Advisor, Conservation Science

WWF-CANADA

WATERSHED REPORTS

Lower Mackenzie Watershed

June, 2015 LOWER MACKENZIE WATERSHED REPORT

CONTENTS

FRESHWATER HEALTH ASSESSMENT ...... 2

Summary ...... 2

Overall River Health Scoring ...... 2

Overall Data Sufficiency Scoring ...... 3

HYDROLOGY ...... 4

Overall Hydrology River Health Scoring ...... 4

Hydrology Data Sufficiency ...... 6

Long-Term Trends in Monthly Flow for the Lower Mackenzie Basin...... 8

Recent-Term Trends in Monthly Flow for the Lower mackenzie Basin ...... 14

Trends in Annual Flow for the Lower Mackenzie ...... 23

Hydrological Alteration in the Lower Mackenzie Basin ...... 28

WATER QUALITY ...... 43

Overall Water Quality Health Scoring ...... 43

Water Quality Data Sufficiency ...... 44

FISH ...... 63

Overall Fish Health Scoring ...... 63

Fish Data Sufficiency ...... 64

BENTHICS ...... 69

Overall Benthic Health Scoring ...... 69

Benthic Data Sufficiency ...... 70

FRESHWATER THREATS ASSESSMENT ...... 74

SUMMARY ...... 74

SUB-INDICATOR SCORES BY SUB-WATERSHED ...... 77

Pollution...... 77

Climate Change ...... 78

Alteration of Water Flows ...... 79

Invasive Species ...... 79

Water Use ...... 80

Fragmentation ...... 80

Habitat Loss ...... 81

WWF-Canada Watershed Report for the Lower Mackenzie Watershed. 1 Disclaimer: This analysis reflects currently accessible and available data that aligns with our nationally consistent suite of indicators, as of June 2015.

FRESHWATER HEALTH ASSESSMENT

SUMMARY

OVERALL RIVER HEALTH SCORING

07U - 10G - 10H - 10K - 07P - 07Q - Great 07S - 10D - 10F - Western 10A - 10B - 10C - 10E - Upper Central 10J - Central 10L - Basin Southern Slave Lake- 07R - Northeastern 07T - Central Upper 10M - Indicator 07N - Slave 07O - Hay Great Upper Central Fort Lower Mackenzie- Mackenzie- Great Mackenzie- Lower Great East Arm Lockhart Great Slave Marian Liard- Mackenzie- Peel Slave Liard Liard Nelson Liard Camsell Blackwater Bear The Mackenzie Slave Lake South Shore Lake Petitot Mills Lake Lake Band Lake Ramparts

Hydrology Health Data Data Very Data Data Good Very Poor Good Good Good Good Good Fair Very Poor Good Good Good Good Poor Poor Poor Category deficient deficient Poor deficient deficient Hydrology Hydrology Score 4 1 0 0 4 4 1 0 4 4 4 0 3 1 4 4 4 4 2 2 2

Water Quality Data Data Data Data Data Data Data Data Data Fair Fair Good Good Fair Fair Fair Good Poor Fair Poor Fair Water Health Category Deficient Deficient Deficient Deficient Deficient deficient Deficient Deficient Deficient Quality Water Quality 3 3 0 0 0 4 0 0 4 0 0 3 3 3 0 0 4 2 3 2 3 Health Score Overall Benthic Health Data Data Data Data Data Data Data Data Very Data Very Data Data Data Data Data Very Data Benthic Good Very Good Fair Category Deficient Deficient Deficient Deficient Deficient Deficient Deficient Deficient Good Deficient Good Deficient Deficient Deficient Deficient Deficient Good Deficient Macro- Benthic Health Invertebrates 0 0 0 0 0 0 0 0 5 0 4 5 0 0 0 0 0 5 3 5 0 Score Fish Health Data Data Data Data Data Data Data Data Data Data Data Data Data Data Data Data Good Good Good Good Good Category Deficient Deficient Deficient Deficient Deficient Deficient Deficient Deficient Deficient Deficient Deficient Deficient Deficient Deficient Deficient Deficient Fish Fish Health Score 0 4 4 0 0 0 0 0 4 0 4 4 0 0 0 0 0 0 0 0 0

Total Score 7 8 4 0 4 8 1 0 17 4 12 12 6 4 4 4 8 11 8 9 5

Total Available Score 10 15 5 0 5 10 5 0 20 10 15 15 10 10 5 5 10 15 15 15 10

Percentage of Maximum Score 70.00% 53.33% 80.00% 0.00% 80.00% 80.00% 20.00% 0.00% 85.00% 40.00% 80.00% 80.00% 60.00% 40.00% 80.00% 80.00% 80.00% 73.33% 53.33% 60.00% 50.00%

Data Data Data Data Data Data Data Very Data Data Data Data Data Data Data Overall Health Category Poor Good Good Good Poor Fair Deficient Deficient Deficient Deficient Deficient Deficient Deficient Good Deficient Deficient Deficient Deficient Deficient Deficient Deficient

WWF-Canada Watershed Report for the Lower Mackenzie Watershed. 2 Disclaimer: This analysis reflects currently accessible and available data that aligns with our nationally consistent suite of indicators, as of June 2015.

OVERALL DATA SUFFICIENCY SCORING

07Q - 10G - 10H - 10K - 07P - Great 07S - 07U - 10D - 10F - 10A - 10B - 10E - Upper Central Central 10L - 07N - Southern Slave 07R - Northeastern 07T - Western 10C - Fort Central Upper 10J - Great Basin Indicator 07O - Hay Upper Central Lower Mackenzie- Mackenzie- Mackenzie- Lower 10M - Peel Slave Great Lake- East Lockhart Great Slave Marian Great Nelson Liard- Mackenzie- Bear Liard Liard Liard Camsell Blackwater The Mackenzie Slave Lake Arm South Lake Slave Lake Petitot Mills Lake Band Lake Ramparts Shore Data Partially Partially Partially Partially Partially Partially Partially Partially Partially Partially Partially Partially Partially Partially Partially Partially Moderately Sufficiency Insufficient Insufficient Insufficient Insufficient Sufficient Sufficient Sufficient Sufficient Sufficient Sufficient Sufficient Sufficient Sufficient Sufficient Sufficient Sufficient Sufficient Sufficient Sufficient Sufficient Sufficient Category Hydrology Data Sufficiency 1 1 0 0 1 1 0 0 1 1 1 0 1 1 1 1 1 1 1 1 2 Score Data Partially Partially Partially Partially Partially Partially Partially Partially Partially Partially Sufficiency Insufficient Insufficient Insufficient Insufficient Insufficient Insufficient Insufficient Sufficient Sufficient Insufficient Insufficient Sufficient Sufficient Sufficient Sufficient Sufficient Sufficient Sufficient Sufficient Sufficient Sufficient Water Category Quality Data Sufficiency 1 1 0 0 0 1 0 0 1 0 0 3 3 1 0 0 1 1 1 1 1 Overall Score River Data Partially Partially Partially Partially Partially Partially Health Sufficiency Insufficient Insufficient Insufficient Insufficient Insufficient Insufficient Insufficient Insufficient Insufficient Insufficient Insufficient Insufficient Insufficient Insufficient Insufficient Benthic Sufficient Sufficient Sufficient Sufficient Sufficient Sufficient Category Macro- Data Invertebrates Sufficiency 0 0 0 0 0 0 0 0 1 0 1 1 0 0 0 0 0 1 1 1 0 Score Data Partially Partially Partially Partially Sufficiency Insufficient Sufficient Insufficient Insufficient Insufficient Insufficient Insufficient Insufficient Insufficient Insufficient Insufficient Insufficient Insufficient Insufficient Insufficient Insufficient Insufficient Sufficient Sufficient Sufficient Sufficient Category Fish Data Sufficiency 0 3 1 0 0 0 0 0 1 0 1 1 0 0 0 0 0 0 0 0 0 Score Total Score 2 5 1 0 1 2 0 0 4 1 3 5 4 2 1 1 2 3 3 3 3 Total Available Score 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 Percentage of Maximum 16.67% 41.67% 8.33% 0.00% 8.33% 16.67% 0.00% 0.00% 33.33% 8.33% 25.00% 41.67% 33.33% 16.67% 8.33% 8.33% 16.67% 25.00% 25.00% 25.00% 25.00% Score Overall Data Sufficiency Partially Partially Partially Partially Partially Partially Partially Insufficient Insufficient Insufficient Insufficient Insufficient Insufficient Insufficient Insufficient Insufficient Insufficient Insufficient Insufficient Insufficient Insufficient Category Sufficient Sufficient Sufficient Sufficient Sufficient Sufficient Sufficient

WWF-Canada Watershed Report for the Lower Mackenzie Watershed. 3 Disclaimer: This analysis reflects currently accessible and available data that aligns with our nationally consistent suite of indicators, as of June 2015.

HYDROLOGY

OVERALL HYDROLOGY RIVER HEALTH SCORING

07Q - 07P - Great 07U - 10G - 10H - 10K - 07S - 10D - 10F - Southern Slave Western 10A - 10B - 10C - 10E - Upper Central 10J - Central 10L - 07N - 07O - 07R - Northeastern 07T - Central Upper 10M - Basin Indicator Great Lake- Great Upper Central Fort Lower Mackenzie- Mackenzie- Great Mackenzie- Lower Slave Hay Lockhart Great Slave Marian Liard- Mackenzie- Peel Slave East Arm Slave Liard Liard Nelson Liard Camsell Blackwater Bear The Mackenzie Lake Petitot Mills Lake Lake South Lake Band Lake Ramparts Shore Average percentage Period of 1959- 1963- 1963- 1975- 1964- 1944- 1944- 1942- 1963- 1969- - - 1941-2012 - - 1969-2012 1960-2012 1974-2012 1963-2012 1972-2012 Various change in median Study 2012 2012 2012 2012 2012 2012 2012 2012 2012 2012 monthly flow, Number measured as the Long- of 1 1 0 0 1 1 1 0 3 1 1 0 1 1 1 1 2 1 1 2 20 relative change in Term Stations median monthly flow Trends in Data Data Data Data per year, reported as Value 0.10 1.00 0.00 2.28 2.96 0.14 0.22 0.30 0.22 3.47 0.33 0.70 0.17 0.22 0.83 0.38 0.71 Monthly Deficient Deficient Deficient Deficient an average across Flow Health Data Data Very Data Data studied stations and Good Fair Fair Fair Good Good Good Good Fair Good Good Good Good Good Good Good weighted by the Category Deficient Deficient Good Deficient Deficient Health median annual flow 4 3 0 0 5 3 3 0 4 4 4 0 4 3 4 4 4 4 4 4 4 per station. Score Average percentage Period of 1983- 1975- 1983- 1983- 1980- 1979- 1983- 1974- 1980- 1985- - - 1975-2012 - - 1975-2012 1980-2012 1979-2012 1980-2012 1980-2012 Various change in median Study 2012 2012 2012 2012 2012 2012 2012 2012 2012 2012 Hydrology monthly flow, Number measured as the Recent- of 1 2 0 0 1 3 1 0 3 4 5 0 5 2 4 1 2 2 2 2 40 relative change in Term Stations median monthly flow Trends in Data Data Data Data per year, reported as Value 0.8 0.84 0 0.25 2.96 0.14 0.29 0.27 0.23 2.96 0.36 0.65 0.18 0.21 0.84 0.86 0.56 Monthly Deficient Deficient Deficient Deficient an average across Flow Health Data Data Very Data Data studied stations and Good Good Good Fair Good Good Good Good Fair Good Good Good Good Good Good Good weighted by the Category Deficient Deficient Good Deficient Deficient Health median annual flow 4 4 0 0 5 4 3 0 4 4 4 0 4 3 4 4 4 4 4 4 4 per station. Score Period of 1959- 1963- 1963- 1975- 1964- 1944- 1944- 1942- 1969- - - 1941-2012 - - 1969-2012 1960-2012 1960-2012 Various 1963-2012 1972-2012 Various Study 2012 2012 2012 2012 2012 2012 2012 2012 2012 Average percentage Number change in median Long- of 1 1 0 0 1 1 1 0 3 1 1 0 1 1 1 1 2 1 1 2 20 annual flow, reported Term Stations as an average across Trends in Data Data Data Data studied stations and Value 0.00% 0.00% 0.00% 0.00% 3.23% 0.00% 0.00% 0.68% 0.82% 4.28% 0.00% 8.19% 0.30% 0.00% 1.89% 1.25% 0.01 Annual Deficient Deficient Deficient Deficient weighted by the Flow Health Very Very Data Data Very Data Very Very Data median annual flow Very Good Fair Good Good Fair Very Good Poor Good Very Good Fair Fair Fair per station. Category Good Good Deficient Deficient Good Deficient Good Good Deficient Health 5 5 0 0 5 5 3 0 5 5 4 0 4 3 5 2 4 5 3 3 3 Score

WWF-Canada Watershed Report for the Lower Mackenzie Watershed. 4 Disclaimer: This analysis reflects currently accessible and available data that aligns with our nationally consistent suite of indicators, as of June 2015.

07Q - 07P - Great 07U - 10G - 10H - 10K - 07S - 10D - 10F - Southern Slave Western 10A - 10B - 10C - 10E - Upper Central 10J - Central 10L - 07N - 07O - 07R - Northeastern 07T - Central Upper 10M - Great Lake- Great Upper Central Fort Lower Mackenzie- Mackenzie- Great Mackenzie- Lower Basin Slave Hay Lockhart Great Slave Marian Liard- Mackenzie- Peel Slave East Arm Slave Liard Liard Nelson Liard Camsell Blackwater Bear The Mackenzie Lake Petitot Mills Lake Lake South Lake Band Lake Ramparts Shore Percentage of total Period of 1959- 1963- 1963- 1975- - - 1941-2012 - Various Various Various Various Various 1969-2012 1960-2012 1972-2012 Various 1963-2012 1972-2012 Various Various months, for all Study 2012 2012 2012 2012 stations analyzed, Number of 1 1 0 0 1 1 1 0 3 1 1 0 1 1 1 1 2 1 1 2 20 with significantly Stations different variance in Data Data Data Data Value 83.3% 91.7% 75.0% 50.0% 75.0% 62% 66.7% 53.8% 83.3% 91.7% 50.0% 16.70% 76.4% 83.3% 91.7% 64.8% 69.0% monthly flow pre- Deficient Deficient Deficient Deficient vs. post-dam Pre- vs. Health Very Very Data Data Very Very Data Very Very Data Very Very Very operation or for Poor Poor Very Poor Poor Good Very Poor Very Poor Very Poor Post-Dam Category Poor Poor Deficient Deficient Poor Poor Deficient Poor Poor Deficient Poor Poor Poor or Recent historical vs. Recent Health time periods in 1 1 0 0 1 2 1 0 1 1 2 0 1 1 2 4 1 1 1 1 1 vs. Score Historical undammed systems. Period of 1959- 1963- 1963- 1975- Analysis Percentage change - - 1941-2012 - Various Various Various Various Various 1969-2012 1960-2012 1960-2012 Various 1963-2012 1972-2012 Various Various of in median monthly Study 2012 2012 2012 2012 Monthly Number of flow pre-and post- 1 1 0 0 1 1 1 0 3 1 1 0 1 1 1 1 2 1 1 2 20 Flow dam or for historical Stations vs. Recent time Data Data Data Data Value 20.5% 85.1% 5.2% 16.3% 78.4% 12.2% 12.2% 10.4% 16.9% 265.0% 14.3% 12.0% 9.04% 13.4% 37.4% 32.2% 35.3% periods in Deficient Deficient Deficient Deficient undammed systems, Health Very Data Data Very Very Data Data Very Hydrology Good Good Good Good Good Good Very Poor Good Good Good Fair Fair Fair averaged across Category Poor Deficient Deficient Good Poor Deficient Deficient Good studied stations by Health 4 1 0 0 5 4 1 0 4 4 4 0 4 1 4 4 5 4 3 3 3 mean annual flow. Score Data Data Data Data Total Score 18 14 21 18 11 18 18 18 17 11 19 18 18 18 15 15 15 Deficient Deficient Deficient Deficient Maximum Data Data Data Data Available 25 25 25 25 25 25 25 25 25 25 25 25 25 25 25 25 25 Deficient Deficient Deficient Deficient Score Percentage of Data Data Data Data Hydrology Score 72.0% 56.0% 84.0% 72.0% 44.0% 72.0% 72.0% 72.0% 68.0% 44.0% 76.0% 72.0% 72.0% 72.0% 60.0% 60.0% 60.00% Maximum Deficient Deficient Deficient Deficient Score Hydrology Very Data Data Very Data Data Health Good Good Good Good Good Good Fair Very Poor Good Good Good Good Poor Poor Poor Poor deficient deficient Poor deficient deficient Category Hydrology 4 1 0 0 4 4 1 0 4 4 4 0 3 1 4 4 4 4 2 2 2 Score

WWF-Canada Watershed Report for the Lower Mackenzie Watershed. 5 Disclaimer: This analysis reflects currently accessible and available data that aligns with our nationally consistent suite of indicators, as of June 2015.

HYDROLOGY DATA SUFFICIENCY

07Q - 10G - 10H - 10K - 07P - Great 07S - 07U - 10D - 10F - 10A - 10B - 10E - Upper Central 10J - Central 10L - Data Sufficiency 07N - Southern Slave 07R - Northeastern 07T - Western 10C - Fort Central Upper 10M - Basin 07O - Hay Upper Central Lower Mackenzie- Mackenzie- Great Mackenzie- Lower Indicator Slave Great Lake- East Lockhart Great Slave Marian Great Nelson Liard- Mackenzie- Peel Liard Liard Liard Camsell Blackwater Bear The Mackenzie Slave Lake Arm South Lake Slave Lake Petitot Mills Lake Band Lake Ramparts Shore Total number of sub- 3 3 3 5 3 3 2 3 4 5 6 2 4 3 4 3 5 4 4 3 72 sub-basins Total number of 0 0 0 1 0 4 0 0 0 0 0 0 0 0 0 0 0 0 0 0 5 dams (>10m) Year of earliest dam - - - 1965 - 1941 ------1965 operation Year of earliest available continuous 1959 1963 - - 1963 1941 1975 - 1960 1944 1944 - 1942 1969 1960 1974 1963 1963 1972 1968 1941 flow monitoring Number of Hydrology monitoring stations available for earliest, 1 1 0 0 1 1 1 0 1 1 1 0 1 1 1 1 2 1 1 1 17 continuous flow monitoring Number of sub-sub- basins with 1 1 0 0 1 1 1 0 1 1 1 0 1 1 1 1 2 1 1 1 17 monitoring stations Number of monitoring stations - - - 0 - 1 ------1 on river downstream of dams Data Sufficiency Partially Partially Partially Partially Partially Partially Partially Partially Partially Partially Partially Partially Partially Partially Partially Moderately Insufficient Insufficient Insufficient Insufficient Insufficient Category Sufficient Sufficient Sufficient Sufficient Sufficient Sufficient Sufficient Sufficient Sufficient Sufficient Sufficient Sufficient Sufficient Sufficient Sufficient Sufficient

WWF-Canada Watershed Report for the Lower Mackenzie Watershed. 6 Disclaimer: This analysis reflects currently accessible and available data that aligns with our nationally consistent suite of indicators, as of June 2015.

07Q - 10G - 10H - 10K - 07P - Great 07S - 07U - 10D - 10A - 10B - 10E - 10F - Upper Upper Central Central 10L - Data Sufficiency 07N - Southern Slave Lake- 07R - Northeastern 07T - Western 10C - Fort Central 10J - Great 07O - Hay Upper Central Lower Mackenzie- Mackenzie- Mackenzie- Mackenzie- Lower 10M - Peel Basin Indicator Slave Great East Arm Lockhart Great Slave Marian Great Nelson Liard- Bear Liard Liard Liard Mills Lake Camsell Blackwater The Mackenzie Slave Lake South Lake Slave Lake Petitot Band Lake Ramparts Shore Year of long-term continuous flow 1959 1963 - - 1963 1941 1975 - 1964 1944 1944 - 1942 1969 1960 1974 1963 1963 1972 1969 1975 monitoring Number of monitoring stations available for 1 1 0 0 1 1 1 0 3 1 1 0 1 1 1 1 2 1 1 2 20 continuous flow monitoring analysis Number of sub- sub-basins with 1 1 0 0 1 1 1 0 3 1 1 0 1 1 1 1 2 1 1 2 20 monitoring stations Number of monitoring stations on river - - - 0 - 1 ------1 downstream of dams Data Sufficiency Partially Partially Partially Partially Partially Partially Partially Partially Partially Partially Partially Partially Partially Partially Partially Partially Partially Insufficient Insufficient Insufficient Insufficient Category Sufficient Sufficient Sufficient Sufficient Sufficient Sufficient Sufficient Sufficient Sufficient Sufficient Sufficient Sufficient Sufficient Sufficient Sufficient Sufficient Sufficient Year of widespread, continuous flow 1983 1975 - - 1983 1983 1983 - 1980 1979 1983 - 1974 1975 1980 1979 1980 1980 1980 1985 1985 monitoring

Hydrology Number of monitoring stations available for 1 2 0 0 1 3 1 0 3 4 5 0 5 2 4 1 2 2 2 2 40 continuous flow monitoring analysis Number of sub- sub-basins with 1 2 0 0 1 1 1 0 3 1 2 0 3 2 3 1 2 2 2 2 29 monitoring stations Number of monitoring stations on river - - - 0 - 1 ------1 downstream of dams Data Sufficiency Partially Partially Partially Partially Partially Partially Partially Partially Partially Partially Partially Partially Partially Moderately Insufficient Insufficient Insufficient Insufficient Insufficient Insufficient Insufficient Category Sufficient Sufficient Sufficient Sufficient Sufficient Sufficient Sufficient Sufficient Sufficient Sufficient Sufficient Sufficient Sufficient Sufficient Overall Data Partially Partially Partially Partially Partially Partially Partially Partially Partially Partially Partially Partially Partially Partially Partially Partially Moderately Insufficient Insufficient Insufficient Insufficient Sufficiency Category Sufficient Sufficient Sufficient Sufficient Sufficient Sufficient Sufficient Sufficient Sufficient Sufficient Sufficient Sufficient Sufficient Sufficient Sufficient Sufficient Sufficient Data Sufficiency 1 1 0 0 1 1 0 0 1 1 1 0 1 1 1 1 1 1 1 1 2 Score

WWF-Canada Watershed Report for the Lower Mackenzie Watershed. 7 Disclaimer: This analysis reflects currently accessible and available data that aligns with our nationally consistent suite of indicators, as of June 2015.

LONG-TERM TRENDS IN MONTHLY FLOW FOR THE LOWER MACKENZIE BASIN.

MAP. RESULTS OF A SERIES OF LONG-TERM TREND ANALYSES OF MEDIAN MONTHLY FLOW IN THE LOWER MACKENZIE BASIN FOR THE PERIOD OF 1941-2012.

WWF-Canada Watershed Report for the Lower Mackenzie Watershed. 8 Disclaimer: This analysis reflects currently accessible and available data that aligns with our nationally consistent suite of indicators, as of June 2015.

TABLE. RESULTS OF LONG-TERM TREND ANALYSES FOR MEDIAN MONTHLY FLOW IN THE SLAVE (07N), HAY (07O), LOCKHART (07R), NORTHEASTERN GREAT SLAVE LAKE (07S) AND MARIAN (07T) SUB-WATERSHEDS.

07N - Slave 07O - Hay 07R - Lockhart 07S - Northeastern Great Slave Lake 07T - Marian

07NB001 07OB001 07RD001 07SB003 07TA001

Start Year for Analysis 1959 Start Year for Analysis 1963 Start Year for Analysis 1963 Start Year for Analysis 1941 Start Year for Analysis 1975

Median Annual Flow (m3/s) 2839.74 Median Annual Flow (m3/s) 47.93 Median Annual Flow (m3/s) 106.61 Median Annual Flow (m3/s) 40.56 Median Annual Flow (m3/s) 26.5 Average Average Average Average Average Average Percentage Average Percentage Average Percentage Average Percentage Average Percentage Theil-Sen Mann-Kendall p- Median Change in Theil-Sen Mann-Kendall p- Median Change in Theil-Sen Mann-Kendall p- Median Change in Theil-Sen Mann-Kendall p- Median Change in Theil-Sen Mann-Kendall p- Median Change in Month Slope value Monthly Median Slope value Monthly Median Slope value Monthly Median Slope value Monthly Median Slope value Monthly Median Flow Monthly Flow Monthly Flow Monthly Flow Monthly Flow Monthly Flow* Flow* Flow* Flow* Flow*

October -22.414 1.109E-04 *** 3240.442 -0.692 0.612 0.219 71.203 -0.189 0.575 135.694 1.067 0.001 ** 43.838 2.433 0.863 1.710E-05 *** 29.551 2.922 November -1.207 0.823 2252.904 0.571 0.032 * 31.698 1.802 -0.289 0.516 125.324 1.110 0.001 *** 41.458 2.678 0.866 2.280E-06 *** 26.147 3.311 December 12.222 1.503E-04 *** 1943.190 0.629 0.206 0.007 ** 11.982 1.717 -0.220 0.498 116.240 1.075 3.636E-04 *** 39.235 2.740 0.850 1.560E-06 *** 23.805 3.571 January 13.000 0.001 *** 1942.527 0.669 0.121 0.001 *** 6.392 1.895 -0.145 0.522 103.783 0.936 0.001 *** 37.489 2.498 0.724 2.830E-06 *** 21.265 3.406 February 25.000 8.611E-06 *** 1912.801 1.307 0.107 1.208E-04 *** 4.442 2.412 -0.096 0.702 93.030 0.870 3.078E-04 *** 34.750 2.504 0.732 9.440E-07 *** 20.133 3.637 March 23.509 4.781E-05 *** 1730.600 1.358 0.095 2.142E-05 *** 3.307 2.873 -0.027 0.897 82.948 0.806 1.891E-04 *** 32.990 2.444 0.792 5.940E-07 *** 20.429 3.878 April 25.412 1.213E-04 *** 1914.607 1.327 0.125 0.008 ** 9.797 1.273 -0.012 0.933 75.041 0.758 8.237E-05 *** 30.969 2.446 0.823 9.070E-06 *** 23.579 3.491 May -9.302 0.399 4063.670 -1.081 0.724 329.540 -0.084 0.605 73.230 0.782 2.324E-04 *** 36.027 2.171 0.862 3.900E-06 *** 31.979 2.697 June -39.394 1.697E-04 *** 4830.106 -0.816 1.113 0.201 205.917 0.280 0.422 98.371 0.933 0.009 ** 44.158 2.113 0.802 1.565E-04 *** 40.706 1.970 July -43.636 0.001 *** 4595.319 -0.950 1.500 0.150 156.358 0.219 0.509 121.659 0.899 0.016 * 55.632 1.616 0.747 2.938E-04 *** 38.130 1.959 August -32.143 0.001 ** 3882.699 -0.828 1.477 0.060 116.891 0.000 0.953 138.566 0.871 0.009 ** 52.618 1.655 0.760 8.670E-05 *** 34.557 2.199 September -27.255 9.242E-05 *** 3471.715 -0.785 0.836 0.101 93.043 -0.071 0.893 142.849 0.970 0.003 ** 47.631 2.036 0.800 3.530E-05 *** 31.763 2.519 Average for all months, -6.351 2981.715 0.102 0.473 86.714 0.998 -0.053 108.895 0.000 0.923 41.400 2.278 0.802 28.504 2.963 for each station * Percentage change in median monthly flow is only calculated for months with a statistically significant trend over time. For months without a significant trend, a value of zero is assigned for calculation of the overall station score.

WWF-Canada Watershed Report for the Lower Mackenzie Watershed. 9 Disclaimer: This analysis reflects currently accessible and available data that aligns with our nationally consistent suite of indicators, as of June 2015.

TABLE. RESULTS OF LONG-TERM TREND ANALYSES FOR MEDIAN MONTHLY FLOW IN THE UPPER LIARD (10A) SUB-WATERSHED.

10A - Upper Liard 10AA001 10AB001 10AC005 Start Year for Analysis 1964 Start Year for Analysis 1964 Start Year for Analysis 1964 Median Annual Flow (m3/s) 215.36 Median Annual Flow (m3/s) 26.18 Median Annual Flow (m3/s) 8.17

Theil- Average Average Percentage Theil- Average Average Percentage Theil- Average Average Percentage Mann-Kendall Mann-Kendall Mann-Kendall Month Sen Median Change in Median Sen Median Change in Median Sen Median Change in Median p-value p-value p-value Slope Monthly Flow Monthly Flow* Slope Monthly Flow Monthly Flow* Slope Monthly Flow Monthly Flow*

October 0.412 0.684 327.5 0.286 0.436 43.05 0.014 0.724 14.85 November 0.331 0.485 170.5 0.093 0.651 26.05 0.004 0.803 7.155 December 0.169 0.443 126.5 0.150 0.206 20.1 0.005 0.617 4.7925 January 0.304 0.099 101.15 0.177 0.027 * 15.4 1.15 0.008 0.241 3.41 February 0.406 0.005 ** 84.25 0.48 0.142 0.014 * 13 1.09 0.010 0.117 2.885 March 0.407 0.002 ** 75.4 0.54 0.097 0.029 * 11.6 0.83 0.007 0.231 2.51 April 0.346 0.004 ** 80.4 0.43 0.122 0.014 * 11.8 1.03 0.018 0.007 ** 2.5975 0.69 May 1.661 0.320 428.5 0.823 0.238 53.95 0.225 0.066 15.8 June -3.125 0.369 1200 0.446 0.808 159.5 -0.193 0.413 66.05 July -3.269 0.061 704.25 -1.286 0.195 89.25 -0.134 0.289 32 August -1.563 0.149 418.25 -0.500 0.412 52.9 -0.076 0.244 16.9 September -0.090 0.914 397.25 0.625 0.248 52.075 0.025 0.796 20.175

Average for all months, for each -0.33 342.83 0.12 0.10 45.72 0.34 -0.01 15.76 0.06 station

Average percentage change in median monthly flow for all months, weighted by median annual flow, for Upper Liard sub-basin 0.14

* Percentage change in median monthly flow is only calculated for months with a statistically significant trend over time. For months without a significant trend, a value of zero is assigned for calculation of the overall station score.

WWF-Canada Watershed Report for the Lower Mackenzie Watershed. 10 Disclaimer: This analysis reflects currently accessible and available data that aligns with our nationally consistent suite of indicators, as of June 2015.

TABLE. RESULTS OF LONG-TERM TREND ANALYSES FOR MEDIAN MONTHLY FLOW IN THE CENTRAL LIARD (10B), FORT NELSON (10C), LOWER LIARD (10E) AND UPPER MACKEZIE MILLS LAKE (10F) SUB-WATERSHEDS.

10B - Central Liard 10C - Fort Nelson 10E - Lower Liard 10F - Upper Mackenzie-Mills Lake 10BE001 10CD001 10ED001 10FA002 Start Year for Analysis 1944 Start Year for Analysis 1944 Start Year for Analysis 1942 Start Year for Analysis 1969 Median Annual Flow (m3/s) 706.67 Median Annual Flow (m3/s) 116.93 Median Annual Flow (m3/s) 1,287.65 Median Annual Flow (m3/s) 13.68 Average Average Average Average Average Percentage Average Percentage Average Percentage Average Percentage Theil-Sen Median Change in Theil-Sen Median Change in Theil-Sen Median Change in Theil-Sen Median Change in Month Mann-Kendall p-value Mann-Kendall p-value Mann-Kendall p-value Mann-Kendall p-value Slope Monthly Median Slope Monthly Median Slope Monthly Median Slope Monthly Median Flow Monthly Flow Monthly Flow Monthly Flow Monthly Flow* Flow* Flow* Flow* October 4.028 0.011 * 969.75 0.386 0.178 111.5 7.303 0.178 1285 0.873 0.009 ** 25.379 3.442 November 2.513 0.002 ** 485 0.101 0.496 57.05 -2.500 0.496 462.5 0.439 0.000 *** 8.641 5.085 December 1.755 0.003 ** 368.5 0.48 0.256 0.003 ** 35.75 0.72 2.684 0.003 ** 474.75 0.57 0.211 0.000 *** 4.378 4.825 January 1.573 0.001 ** 302.25 0.52 0.153 0.001 *** 24.3 0.63 2.472 0.001 *** 406.5 0.61 0.118 0.000 *** 2.280 5.169 February 1.564 0.000 *** 267 0.59 0.162 0.000 *** 20.4 0.79 2.168 0.000 *** 342.5 0.63 0.083 0.000 *** 1.639 5.085 March 1.389 0.000 *** 243.5 0.57 0.156 0.000 *** 18.8 0.83 1.238 0.000 *** 305 0.41 0.079 0.000 *** 1.725 4.586 April 1.179 0.002 ** 263.5 0.45 0.052 0.731 28.425 2.295 0.731 333.5 0.208 0.000 *** 4.490 4.635 May -2.174 0.591 1222.5 0.206 0.812 255.5 9.487 0.812 2480 0.358 0.754 100.155 June 7.833 0.215 3565 2.950 0.003 ** 485.75 0.61 20.506 0.003 ** 4485 0.46 0.867 0.336 84.774 July 1.708 0.711 2240 0.846 0.403 500.5 7.361 0.403 3365 1.303 0.003 ** 53.074 2.456 August -0.304 0.878 1380 0.226 0.725 309.5 6.667 0.725 2092.5 1.264 0.004 ** 40.411 3.127 September 3.681 0.060 1225 0.725 0.168 210 12.396 0.168 1715 1.142 0.012 * 35.499 3.216

Average for all months, 2.06 1044.33 0.22 0.52 171.46 0.30 6.01 1478.94 0.22 0.579 30.204 3.469 for each station

WWF-Canada Watershed Report for the Lower Mackenzie Watershed. 11 Disclaimer: This analysis reflects currently accessible and available data that aligns with our nationally consistent suite of indicators, as of June 2015.

TABLE. RESULTS OF LONG-TERM TREND ANALYSES FOR MEDIAN MONTHLY FLOW IN THE UPPER MACKENZIE-CAMSELL BAND (10G), CENTRAL MACKENZIE-BLACKWATER LAKE (10H) AND GREAT BEAR (10J) SUB-WATERSHEDS.

10G - Upper Mackenzie-Camsell Band 10H - Central Mackenzie-Blackwater Lake 10J - Great Bear

10GC001 10HB005 10JA002 10JC003 Start Year for Analysis 1960 Start Year for Analysis 1974 Start Year for Analysis 1963 Start Year for Analysis 1963 Median Annual Flow (m3/s) 5414.49 Median Annual Flow (m3/s) 91.62 Median Annual Flow (m3/s) 91.49 Median Annual Flow (m3/s) 469.9 Average Average Average Average Average Percentage Average Percentage Average Percentage Average Percentage Theil-Sen Median Change in Theil-Sen Median Change in Theil-Sen Median Change in Theil-Sen Median Change in Month Mann-Kendall p-value Mann-Kendall p-value Mann-Kendall p-value Mann-Kendall p-value Slope Monthly Median Slope Monthly Median Slope Monthly Median Slope Monthly Median Flow Monthly Flow Monthly Flow Monthly Flow Monthly Flow* Flow* Flow* Flow* October -1.184 0.839 6399.818 1.707 0.003 ** 91.554 1.864 1.067 0.001 ** 102.984 1.036 0.000 0.987 491.320 November 2.549 0.841 3457.651 1.032 0.139 39.051 1.110 0.001 *** 99.074 1.121 0.130 0.836 464.061 December 13.640 0.012 * 2793.653 0.488 0.482 0.056 30.097 1.075 0.000 *** 95.830 1.122 0.038 0.922 452.690 January 16.800 0.010 ** 2656.774 0.632 0.618 0.008 ** 32.191 1.920 0.936 0.001 *** 85.635 1.093 0.205 0.736 442.202 February 14.599 0.006 ** 2556.954 0.571 0.475 0.021 * 23.226 2.045 0.870 0.000 *** 78.636 1.107 -0.385 0.657 441.015 March 16.750 0.000 *** 2388.623 0.701 0.376 0.075 21.969 0.806 0.000 *** 71.876 1.122 0.436 0.338 441.165 April 18.372 0.001 ** 2717.615 0.676 0.523 0.010 ** 20.100 2.602 0.758 0.000 *** 65.673 1.154 0.507 0.406 426.770 May 55.364 0.009 ** 9186.628 0.603 2.704 0.079 202.432 0.782 0.000 *** 68.634 1.140 0.641 0.191 437.413 June 40.000 0.007 ** 12254.394 0.326 -0.123 0.990 349.416 0.933 0.009 ** 97.597 0.956 0.200 0.632 481.941 July 0.000 0.940 10710.593 0.969 0.744 333.483 0.899 0.016 * 113.369 0.793 -0.105 0.874 502.364 August 1.600 0.826 8548.642 -0.403 0.754 260.625 0.871 0.009 ** 113.207 0.769 -0.333 0.633 507.437 September 0.857 0.876 7436.878 0.865 0.327 189.147 0.970 0.003 ** 107.605 0.901 -0.259 0.746 509.620

Average for all months, 14.946 5925.685 0.333 0.769 132.774 0.703 0.923 91.677 1.026 0.090 466.500 0.000 for each station Average percentage change in median monthly flow for all months, weighted by 0.17 median annual flow for Great Bear sub- basin * Percentage change in median monthly flow is only calculated for months with a statistically significant trend over time. For months without a significant trend, a value of zero is assigned for calculation of the overall station score.

WWF-Canada Watershed Report for the Lower Mackenzie Watershed. 12 Disclaimer: This analysis reflects currently accessible and available data that aligns with our nationally consistent suite of indicators, as of June 2015.

TABLE. RESULTS OF LONG-TERM TREND ANALYSES FOR MEDIAN MONTHLY FLOW IN THE CENTRAL MACKENZIE – THE RAMPARTS (10K), LOWER MACKENZIE (10L) AND PEEL RIVER (10M) SUB-WATERSHEDS.

10K - Central Mackenzie-The Ramparts 10L - Lower Mackenzie 10M - Peel River

10KA001 10LC002 10MA001 10MC002

Start Year for Analysis 1963 Start Year for Analysis 1972 Start Year of Monitoring 1969 Start Year of Monitoring 1969

3 3 Median Annual Flow (m3/s) 6101.57 Median Annual Flow (m3/s) 42.76 Median Annual Flow (m /s) 50.05 Median Annual Flow (m /s) 181.25

Average Average Average Average Average Percentage Average Percentage Average Percentage Average Percentage Theil-Sen Median Change in Theil-Sen Median Change in Theil-Sen Median Change in Theil-Sen Median Change in Month Mann-Kendall p-value Mann-Kendall p-value Mann-Kendall p-value Mann-Kendall p-value Slope Monthly Median Slope Monthly Median Slope Monthly Median Slope Monthly Median Flow Monthly Flow Monthly Flow Monthly Flow Monthly Flow* Flow* Flow* Flow*

October -15.833 0.081 7531.962 0.789 0.052 77.020 1.000 0.051 93.50 1.000 0.051 374.50 November -18.500 0.229 4526.028 0.503 0.084 39.622 0.502 0.014 * 50.70 0.99 0.502 0.014 * 179.75 0.28 December 11.026 0.277 4138.210 0.219 0.121 25.994 0.329 0.006 ** 37.15 0.89 0.329 0.006 ** 124.00 0.27 January 26.316 0.012 * 3872.398 0.680 0.542 0.010 * 26.709 2.030 0.312 0.000 *** 27.15 1.15 0.312 0.000 *** 98.58 0.32 February 23.636 0.004 ** 3563.402 0.663 0.494 0.005 ** 23.377 2.113 0.308 0.000 *** 23.00 1.34 0.308 0.000 *** 90.58 0.34 March 20.179 0.002 ** 3286.956 0.614 0.613 0.000 *** 18.471 3.321 0.200 0.002 ** 21.15 0.95 0.200 0.002 ** 83.90 0.24 April 21.974 0.001 *** 3358.870 0.654 0.440 0.003 ** 17.803 2.474 0.161 0.056 20.75 0.161 0.056 85.45 May 27.634 0.424 10601.473 2.509 0.052 90.824 7.500 0.038 * 301.50 2.49 7.500 0.038 * 1025.00 0.73 June 22.457 0.302 14988.429 -1.345 0.322 311.526 -6.981 0.002 ** 394.75 1.77 -6.981 0.002 ** 1715.00 0.41 July -4.396 0.808 13107.303 0.348 0.683 209.468 1.842 0.182 243.00 1.842 0.182 1015.00 August -9.524 0.373 10539.700 0.000 0.973 175.879 0.800 0.687 252.50 0.800 0.687 970.25

September -7.538 0.541 8888.348 0.976 0.136 122.256 2.563 0.014 * 239.50 1.07 2.563 0.014 * 827.25 0.31 Average for all months, 8.119 7366.923 0.218 0.507 94.912 0.828 0.71 142.05 0.89 0.71 549.10 0.24 for each station

Average percentage change in median monthly flow for all months, weighted 0.38 by median annual flow for Peel River sub-basin

WWF-Canada Watershed Report for the Lower Mackenzie Watershed. 13 Disclaimer: This analysis reflects currently accessible and available data that aligns with our nationally consistent suite of indicators, as of June 2015.

RECENT-TERM TRENDS IN MONTHLY FLOW FOR THE LOWER MACKENZIE BASIN

MAP. RESULTS OF A SERIES OF TREND ANALYSES OF MEDIAN MONTHLY FLOW IN THE LOWER MACKENZIE BASIN FOR THE PERIOD OF 1980-2013.

WWF-Canada Watershed Report for the Lower Mackenzie Watershed. 14 Disclaimer: This analysis reflects currently accessible and available data that aligns with our nationally consistent suite of indicators, as of June 2015.

TABLE. RESULTS OF RECENT-TERM TREND ANALYSES FOR MEDIAN MONTHLY FLOW IN THE SLAVE (07N), HAY (07O) AND LOCKHART (07R) SUB WATERSHEDS.

07N - Slave 07O - Hay 07R - Lockhart

07NB001 07OB001 07OC001 07RD001

Start Year for Analysis 1983 Start Year for Analysis 1975 Start Year for Analysis 1975 Start Year for Analysis 1983

Median Annual Flow (m3/s) 2580.42 Median Annual Flow (m3/s) 49.54 Median Annual Flow (m3/s) 7.79 Median Annual Flow (m3/s) 98.84

Average Average Average Average Average Percentage Average Percentage Average Percentage Average Percentage Theil-Sen Mann-Kendall Median Change in Theil-Sen Mann-Kendall Median Change in Theil-Sen Mann-Kendall Median Change in Theil-Sen Mann-Kendall Median Change in Month Slope p-value Monthly Median Slope p-value Monthly Median Slope p-value Monthly Median Slope p-value Monthly Median Flow Monthly Flow Monthly Flow Monthly Flow Monthly Flow* Flow* Flow* Flow*

October -22.414 1.109E-04 *** 2930.365 0.765 0.612 0.219 77.980 -0.026 0.802 11.559 -0.189 0.575 128.203 November -1.207 0.823 2174.259 0.571 0.032 * 35.863 1.592 0.005 0.820 3.720 -0.289 0.516 118.146 December 12.222 1.503E-04 *** 1982.691 0.616 0.206 0.007 ** 13.555 1.518 0.019 0.044 * 1.664 1.160 -0.220 0.498 108.605 January 13.000 0.001 *** 1989.578 0.653 0.121 0.001 *** 7.318 1.655 0.013 0.074 0.918 -0.145 0.522 97.126 February 25.000 8.611E-06 *** 2028.801 1.232 0.107 1.208E-04 *** 5.049 2.122 0.011 0.044 * 0.644 1.687 -0.096 0.702 87.75 March 23.509 4.781E-05 *** 1865.732 1.260 0.095 2.142E-05 *** 3.780 2.513 0.012 0.017 * 0.750 1.600 -0.027 0.897 78.233 April 25.412 1.213E-04 *** 2079.886 1.222 0.125 0.008 ** 8.854 1.409 0.008 0.812 10.688 -0.012 0.933 70.687 May -9.302 0.399 3680.478 -1.081 0.724 288.118 -0.361 0.745 98.616 -0.084 0.605 69.073 June -39.394 1.697E-04 *** 4193.966 0.939 1.113 0.201 212.753 -0.022 0.965 49.351 0.280 0.422 95.185 July -43.636 0.001 *** 3932.558 1.110 1.500 0.150 162.792 0.467 0.175 46.046 0.219 0.509 118.543 August -32.143 0.001 ** 3376.467 0.952 1.477 0.060 122.441 0.339 0.029 * 26.260 1.291 0.000 0.953 133.981

September -27.255 9.242E-05 *** 3070.990 0.887 0.836 0.101 102.549 0.058 0.537 18.663 -0.071 0.893 137.157 Average for all months, -6.351 2775.481 0.803 0.473 86.754 0.901 0.044 22.407 0.478 -0.053 103.557 0.000 for each station Average percentage change in median monthly flow for all 0.843 months, weighted by median annual flow, for Hay sub-basin

WWF-Canada Watershed Report for the Lower Mackenzie Watershed. 15 Disclaimer: This analysis reflects currently accessible and available data that aligns with our nationally consistent suite of indicators, as of June 2015.

TABLE. RESULTS OF RECENT-TERM TREND ANALYSES FOR MEDIAN MONTHLY FLOW IN THE NORTHEASTERN GREAT SLAVE LAKE (07S) AND MARIAN (07T) SUB WATERSHEDS.

07S - Northeastern Great Slave Lake 07T - Marian

07SB003 07SB010 07SB013 07TA001

Start Year for Analysis 1975 Start Year for Analysis 1975 Start Year for Analysis 1975 Start Year for Analysis 1983

Median Annual Flow (m3/s) 54.89 Median Annual Flow (m3/s) 4.13 Median Annual Flow (m3/s) 5.8 Median Annual Flow (m3/s) 26.5

October 0.085 0.290 53.469 0.090 0.100 5.043 0.000 0.079 5.462 0.863 1.706E-05 *** 29.551 2.922 November 0.154 0.059 52.124 0.104 0.020 * 4.839 2.146 0.001 0.022 * 5.662 0.021 0.866 2.278E-06 *** 26.147 3.311 December 0.200 0.011 * 50.85 0.393 0.089 0.015 * 4.448 2.010 0.006 0.008 ** 5.649 0.098 0.850 1.561E-06 *** 23.805 3.571 January 0.204 0.001 *** 51.618 0.396 0.092 0.007 ** 3.682 2.485 0.008 2.004E-04 *** 5.634 0.142 0.724 2.832E-06 *** 21.265 3.406 February 0.201 2.174E-05 *** 49.695 0.404 0.075 0.005 ** 3.17 2.366 0.008 1.322E-04 *** 5.435 0.138 0.732 9.436E-07 *** 20.133 3.638 March 0.186 2.832E-06 *** 48.131 0.387 0.070 0.008 ** 2.754 2.542 0.006 4.415E-04 *** 5.422 0.102 0.792 5.944E-07 *** 20.429 3.878 April 0.168 1.408E-06 *** 46.202 0.363 0.064 0.004 ** 2.467 2.592 0.005 1.313E-04 *** 5.442 0.091 0.823 9.070E-06 *** 23.579 3.491 May 0.146 0.007 ** 50 0.293 0.164 0.017 * 6.185 2.655 0.004 0.656 6.568 0.862 3.896E-06 *** 31.979 2.697 June 0.141 0.053 57.555 0.105 0.353 10.932 -0.002 0.887 6.032 0.802 1.565E-04 *** 40.706 1.970 July 0.103 0.301 68.155 0.055 0.400 9.665 0.002 0.225 5.51 0.747 2.938E-04 *** 38.13 1.959 August 0.068 0.521 61.849 0.050 0.522 6.968 0.000 0.464 5.821 0.760 8.669E-05 *** 34.557 2.199

September 0.040 0.709 56.698 0.049 0.472 5.684 0.000 0.604 5.808 0.800 3.527E-05 *** 31.763 2.519 Average for all months, 0.141 53.862 0.186 0.084 5.486 1.400 0.003 5.704 0.049 0.802 28.504 2.963 for each station

Average percentage change in median monthly flow for all months, weighted by median annual 0.251 flow for the Northeastern Great Slave Lake

WWF-Canada Watershed Report for the Lower Mackenzie Watershed. 16 Disclaimer: This analysis reflects currently accessible and available data that aligns with our nationally consistent suite of indicators, as of June 2015.

TABLE. RESULTS OF RECENT-TERM TREND ANALYSES FOR MEDIAN MONTHLY FLOW IN THE UPPER LIARD (10C) SUB-WATERSHED.

10A - Upper Liard 10AA001 10AB001 10AC005 Start Year for Analysis 1980 Start Year for Analysis 1980 Start Year for Analysis 1980 Median Annual Flow (m3/s) 217.72 Median Annual Flow (m3/s) 26.18 Median Annual Flow (m3/s) 8.30 Average Average Average Average Percentage Average Percentage Average Percentage Theil-Sen Mann-Kendall Median Change in Theil-Sen Mann-Kendall Median Change in Theil-Sen Mann-Kendall Median Change in Month Slope p-value Monthly Median Slope p-value Monthly Median Slope p-value Monthly Median Flow Monthly Flow Monthly Flow Monthly Flow* Flow* Flow* October 0.412 0.684 328.526 0.286 0.436 43.05 0.014 0.724 16.221 November 0.331 0.485 167.213 0.093 0.651 26.05 0.004 0.803 7.111 December 0.169 0.443 127.319 0.150 0.206 20.10 0.005 0.617 4.764 January 0.304 0.099 101.643 0.177 0.027 * 15.40 1.15 0.008 0.241 3.389 February 0.406 0.005 ** 82.587 0.49 0.142 0.014 * 13.00 1.09 0.010 0.117 2.821 March 0.407 0.002 ** 74.515 0.55 0.097 0.029 * 11.60 0.83 0.007 0.231 2.522 April 0.346 0.004 ** 78.463 0.44 0.122 0.014 * 11.80 1.03 0.018 0.007 ** 2.633 0.68 May 1.661 0.320 519.779 0.823 0.238 53.95 0.225 0.066 25.576 June -3.125 0.369 1163.609 0.446 0.808 159.50 -0.193 0.413 64.146 July -3.269 0.061 687.192 -1.286 0.195 89.25 -0.134 0.289 31.844 August -1.563 0.149 403.291 -0.500 0.412 52.90 -0.076 0.244 15.945 September -0.090 0.914 382.082 0.625 0.248 52.08 0.025 0.796 19.391 Average for all months, -0.33 343.02 0.12 0.10 45.72 0.34 -0.01 16.36 0.06 for each station Average percentage change in median monthly flow for all months, weighted by 0.14 median annual flow, for the Upper Liard sub- basin * Percentage change in median monthly flow is only calculated for months with a statistically significant trend over time. For months without a significant trend, a value of zero is assigned for calculation of the overall station score.

TABLE. RESULTS OF RECENT-TERM TREND ANALYSES FOR MEDIAN MONTHLY FLOW IN THE CENTRAL LIARD (10B) SUB-WATERSHED.

10B - Central Liard 10BE001 10BE004 10BE007 10BE009 Start Year for Start Year for Start Year for Analysis 1979 Start Year for Analysis 1979 1979 1979 Analysis Analysis Median Annual Flow Median Annual Flow Median Annual Flow Median Annual 686.68 18.36 10.38 1.11 (m3/s) (m3/s) (m3/s) Flow (m3/s) Average Average Average Average Average Percentage Average Percentage Average Percentage Average Percentage Theil- Mann- Theil- Mann- Theil- Mann- Theil- Mann- Median Change in Median Change in Median Change in Median Change in Month Sen Kendall Sen Kendall Sen Kendall Sen Kendall Monthly Median Monthly Median Monthly Median Monthly Median Slope p-value Slope p-value Slope p-value Slope p-value Flow Monthly Flow Monthly Flow Monthly Flow Monthly Flow* Flow* Flow* Flow* October 4.028 0.011 * 969.75 0.42 -0.009 0.862 30.350 -0.025 0.683 13.825 -0.010 0.103 1.150 November 2.513 0.002 ** 485 0.52 -0.016 0.538 15.400 0.008 0.818 9.82 -0.007 0.056 0.946 December 1.755 0.003 ** 368.5 0.48 0.035 0.084 11.550 0.039 0.010 * 7.78 0.50 -0.009 0.054 0.787 January 1.573 0.001 ** 302.25 0.52 0.038 0.028 * 9.450 0.40 0.033 0.010 * 6.55 0.51 -0.002 0.412 0.651 February 1.564 0.000 *** 267 0.59 0.037 0.002 ** 8.548 0.43 0.020 0.056 6.085 -0.002 0.466 0.620 March 1.389 0.000 *** 243.5 0.57 0.035 0.004 ** 7.965 0.43 0.012 0.264 5.715 -0.002 0.653 0.609 April 1.179 0.002 ** 263.5 0.45 0.038 0.008 ** 8.828 0.43 0.004 0.537 6.2725 -0.003 0.420 0.719 May -2.174 0.591 1222.5 0.048 0.697 22.500 -0.048 0.138 8.7 -0.023 0.104 1.590 June 7.833 0.215 3565 0.121 0.745 122.500 0.072 0.633 38.3 -0.025 0.066 1.760 July 1.708 0.711 2240 -0.150 0.570 103.000 -0.100 0.580 30.9 -0.012 0.187 1.560 August -0.304 0.878 1380 -0.158 0.377 65.450 -0.119 0.156 20.45 -0.011 0.168 1.325 September 3.681 0.060 1225 0.000 1.000 47.875 -0.008 0.937 17.65 -0.014 0.058 1.238 Average for all months, 2.06 1044.33 0.29 0.00 37.78 0.14 -0.01 14.34 0.08 -0.01 1.08 0.00 for each station Average percentage change in median monthly flow for all months, weighted 0.29 by median annual flow, for the Centrall Liard sub-basin * Percentage change in median monthly flow is only calculated for months with a statistically significant trend over time. For months without a significant trend, a value of zero is assigned for calculation of the overall station score.

WWF-Canada Watershed Report for the Lower Mackenzie Watershed. 17 Disclaimer: This analysis reflects currently accessible and available data that aligns with our nationally consistent suite of indicators, as of June 2015.

TABLE. RESULTS OF RECENT-TERM TREND ANALYSES FOR MEDIAN MONTHLY FLOW IN THE FORT NELSON (10C) SUB-WATERSHED.

10C - Fort Nelson

10CB001 10CD001 10CD003 10CD004 10CD005 Start Year for Analysis 1983 Start Year for Analysis 1983 Start Year for Analysis 1983 Start Year for Analysis 1983 Start Year for Analysis 1983 3 3 3 3 3 Median Annual Flow (m /s) 12.29 Median Annual Flow (m /s) 96.92 Median Annual Flow (m /s) 0.24 Median Annual Flow (m /s) 0.40 Median Annual Flow (m /s) 0.15

Average Average Average Average Average Average Percentage Average Percentage Average Percentage Average Percentage Average Percentage Theil-Sen Mann-Kendall Median Change in Theil-Sen Mann-Kendall Median Change in Theil-Sen Mann-Kendall Median Change in Theil-Sen Mann-Kendall Median Change in Theil-Sen Mann-Kendall Median Change in Month Slope p-value Monthly Median Slope p-value Monthly Median Slope p-value Monthly Median Slope p-value Monthly Median Slope p-value Monthly Median Flow Monthly Flow Monthly Flow Monthly Flow Monthly Flow Monthly Flow* Flow* Flow* Flow* Flow*

October -0.050 0.211 9.7875 0.386 0.178 96.45 0.001 0.882 0.171 -0.004 0.563 0.29675 -0.003 0.392 0.142 November -0.020 0.403 9.6525 0.101 0.496 95.525 0.000 0.976 0.167 -0.001 0.475 0.3005 -0.001 0.205 0.148 December 0.015 0.336 9.5975 0.256 0.003 ** 95.175 0.269 0.000 0.849 0.16375 0.000 0.736 0.2825 -0.001 0.018 * 0.151 0.442 January 0.017 0.078 10.4525 0.153 0.001 *** 99.925 0.153 0.000 0.982 0.14675 0.000 0.168 0.31 0.000 0.004 ** 0.1505 0.000 February 0.024 0.005 ** 10.3375 0.231 0.162 0.000 *** 101.95 0.159 0.000 0.407 0.14825 0.000 0.053 0.3035 0.000 0.091 0.148 March 0.017 0.042 * 10.2375 0.161 0.156 0.000 *** 102.95 0.151 0.000 0.446 0.13225 0.000 0.259 0.2905 0.000 0.008 ** 0.15075 0.102 April 0.024 0.259 10.225 0.052 0.731 103.275 0.001 0.088 0.13825 0.000 0.872 0.3055 -0.001 0.138 0.139 May 0.039 0.747 10.02 0.206 0.812 103.775 0.095 0.125 0.1545 -0.093 0.239 0.2845 -0.011 0.592 0.146 June 0.285 0.175 9.855 2.950 0.003 ** 103.725 2.844 0.013 0.543 0.16025 0.019 0.789 0.296 -0.005 0.915 0.14675 July 0.047 0.707 9.885 0.846 0.403 103.425 0.014 0.306 0.16925 0.007 0.812 0.30525 -0.014 0.326 0.155 August -0.060 0.591 9.9975 0.226 0.725 101.325 0.003 0.604 0.1625 -0.001 0.973 0.321 -0.010 0.301 0.152

September -0.104 0.256 9.87 0.725 0.168 99.6 0.002 0.790 0.166 0.010 0.610 0.30175 -0.004 0.544 0.146 Average for all months, 0.02 9.99 0.03 0.52 100.59 0.30 0.01 0.16 0.00 -0.01 0.30 0.00 0.00 0.15 0.05 for each station Average percentage change in median monthly flow for all months, weighted by 0.27 median annual flow for the Fort Nelson sub- basin * Percentage change in median monthly flow is only calculated for months with a statistically significant trend over time. For months without a significant trend, a value of zero is assigned for calculation of the overall station score.

WWF-Canada Watershed Report for the Lower Mackenzie Watershed. 18 Disclaimer: This analysis reflects currently accessible and available data that aligns with our nationally consistent suite of indicators, as of June 2015.

TABLE. RESULTS OF RECENT-TERM TREND ANALYSES FOR MEDIAN MONTHLY FLOW IN THE LOWER LIARD (10E) SUB-WATERSHED. 10E - Lower Liard

10EA003 10EB001 10ED001 10ED002 10ED003 Start Year for Analysis 1974 Start Year for Analysis 1974 Start Year for Analysis 1974 Start Year for Analysis 1974 Start Year for Analysis 1974 3 3 3 3 3 Median Annual Flow (m /s) 32.93 Median Annual Flow (m /s) 58.41 Median Annual Flow (m /s) 909.31 Median Annual Flow (m /s) 1,040.27 Median Annual Flow (m /s) 0.68

Average Average Average Average Average Average Percentage Average Percentage Average Percentage Average Percentage Average Percentage Theil- Mann-Kendall Median Change in Theil-Sen Mann-Kendall Median Change in Theil-Sen Mann-Kendall Median Change in Theil-Sen Mann-Kendall Median Change in Theil-Sen Mann-Kendall Median Change in Month Sen p-value Monthly Median Slope p-value Monthly Median Slope p-value Monthly Median Slope p-value Monthly Median Slope p-value Monthly Median Slope Flow Monthly Flow Monthly Flow Monthly Flow Monthly Flow Monthly Flow* Flow* Flow* Flow* Flow*

October 0.356 0.071 47.475 0.333 0.315 100.300 0.038 0.105 1285.000 14.319 0.048 * 1722.500 0.831 0.038 0.105 1.005 November 0.389 0.000 *** 30.100 1.292 0.443 0.001 *** 55.875 0.793 0.013 0.003 ** 462.500 0.003 2.871 0.247 549.250 0.013 0.003 ** 0.496 2.621

December 0.278 0.000 *** 0.651 0.000 *** 0.006 0.000 *** 4.888 0.003 ** 0.006 0.000 *** 24.650 1.127 49.575 1.313 474.750 0.001 614.000 0.796 0.239 2.516

January 0.160 0.000 *** 0.552 0.000 *** 0.004 0.000 *** 5.343 0.000 *** 0.004 0.000 *** 20.950 0.764 40.425 1.365 406.500 0.001 539.000 0.991 0.128 3.125

February 0.161 0.000 *** 0.419 0.000 *** 0.003 0.000 *** 4.692 0.000 *** 0.003 0.000 *** 18.050 0.893 33.000 1.270 342.500 0.001 456.000 1.029 0.084 3.571

March 0.122 0.000 *** 0.292 0.000 *** 0.002 0.000 *** 2.232 0.016 * 0.002 0.000 *** 16.150 0.757 29.200 0.999 305.000 0.001 402.500 0.555 0.073 2.759 April 0.150 0.003 ** 17.450 0.860 0.245 0.000 *** 30.175 0.811 0.002 0.321 333.500 2.357 0.046 * 432.750 0.545 0.002 0.321 0.354 May -0.201 0.756 133.925 -1.235 0.374 132.000 0.215 0.026 * 2480.000 0.009 7.798 0.702 3330.000 0.215 0.026 * 5.678 3.787 June -0.149 0.740 210.250 0.733 0.725 640.500 0.116 0.003 ** 4485.000 0.003 17.917 0.529 5910.000 0.116 0.003 ** 1.678 6.915 July 0.197 0.746 157.250 -0.955 0.385 427.500 0.090 0.004 ** 3365.000 0.003 -6.667 0.805 4772.500 0.090 0.004 ** 1.266 7.108 August 0.191 0.512 116.500 0.129 0.903 325.000 0.061 0.027 * 2092.500 0.003 1.938 0.822 3040.000 0.061 0.027 * 0.927 6.579

September 0.641 0.016 * 88.875 0.721 1.222 0.041 * 196.500 0.622 0.027 0.232 1715.000 14.454 0.108 2380.000 0.027 0.232 0.954 Average for all months, 0.19 73.47 0.53 0.24 171.67 0.60 0.05 1478.94 0.00 6.01 2012.38 0.40 0.05 1.07 3.25 for each station Average percentage change in median monthly flow for all months, weighted by 0.23 median annual flow for the Lower Liard sub-basin

WWF-Canada Watershed Report for the Lower Mackenzie Watershed. 19 Disclaimer: This analysis reflects currently accessible and available data that aligns with our nationally consistent suite of indicators, as of June 2015.

TABLE. RESULTS OF RECENT-TERM TREND ANALYSES FOR MEDIAN MONTHLY FLOW IN THE UPPER MACKENZIE – MILLS LAKE (10F) SUB-WATERSHED.

10F - Upper Mackenzie-Mills Lake 10FA002 10FB005 Start Year for Analysis 1975 Start Year for Analysis 1975 Median Annual Flow Median Annual Flow (m3/s) 13.82 (m3/s) 1.8 Average Average Average Percentage Average Percentage Theil- Theil- Mann- Mann-Kendall Median Change in Median Change in Month Sen Sen Kendall p- p-value Monthly Median Monthly Median Slope Slope value Flow Monthly Flow Monthly Flow* Flow* October 0.873 0.009 ** 27.459 3.181 0.120 0.003 ** 3.481 3.460 November 0.439 0.000 *** 10.013 4.388 0.044 0.000 *** 1.777 2.485 December 0.211 0.000 *** 5.395 3.915 0.019 0.000 *** 1.048 1.835 January 0.118 0.000 *** 2.771 4.254 0.013 0.000 *** 0.665 1.942 February 0.083 0.000 *** 2.007 4.151 0.010 0.000 *** 0.578 1.777 March 0.079 0.000 *** 2.114 3.742 0.009 0.000 *** 0.534 1.721 April 0.208 0.000 *** 5.255 3.961 0.007 0.000 *** 0.709 0.948 May 0.358 0.754 87.601 0.398 0.023 * 14.720 2.703 June 0.867 0.336 76.849 0.196 0.034 * 7.263 2.697 July 1.303 0.003 ** 52.472 2.484 0.189 0.001 *** 4.654 4.053 August 1.264 0.004 ** 43.318 2.917 0.155 0.001 *** 3.790 4.091 September 1.142 0.012 * 37.171 3.071 0.132 0.003 ** 4.048 3.265 Average for all months, 0.579 29.369 3.006 0.108 3.605 2.581 for each station Average percentage change in median monthly flow for all months, weighted by 2.957 median annual flow for the Upper Mackenzie Mills Lake sub-basin * Percentage change in median monthly flow is only calculated for months with a statistically significant trend over time. For months without a significant trend, a value of zero is assigned for calculation of the overall station score.

TABLE. RESULTS OF RECENT-TERM TREND ANALYSES FOR MEDIAN MONTHLY FLOW IN THE UPPER MACKENZIE – CAMSELL BASIN (10G) SUB-WATERSHED. 10G - Upper Mackenzie-Camsell Band 10GA001 10GB006 10GC001 10GC003 Start Year for Analysis 1980 Start Year for Analysis 1980 Start Year for Analysis 1980 Start Year for Analysis 1980 Median Annual Flow Median Annual Flow Median Annual Flow Median Annual Flow (m3/s) 50.2 (m3/s) 31.05 (m3/s) 4831.35 (m3/s) 2.09 Average Average Average Average Average Percentage Average Percentage Average Percentage Average Percentage Theil- Theil- Mann- Theil- Mann- Theil- Mann- Mann-Kendall Median Change in Median Change in Median Change in Median Change in Month Sen Sen Kendall p- Sen Kendall Sen Kendall p-value Monthly Median Monthly Median Monthly Median Monthly Median Slope Slope value Slope p-value Slope p-value Flow Monthly Flow Monthly Flow Monthly Flow Monthly Flow* Flow* Flow* Flow* October 0.608 0.116 49.928 1.023 0.061 44.755 -1.184 0.839 5884.578 0.130 0.011 * 4.092 3.180 November 0.464 0.001 *** 23.626 1.966 0.567 0.010 ** 16.069 3.528 2.549 0.841 3162.037 0.049 0.001 *** 1.683 2.917 December 0.440 0.000 *** 18.047 2.438 0.334 0.008 ** 10.451 3.191 13.640 0.012 * 2739.060 0.498 0.029 0.000 *** 1.079 2.677 January 0.469 0.000 *** 14.363 3.265 0.181 0.004 ** 7.713 2.352 16.800 0.010 ** 2632.277 0.638 0.023 0.000 *** 0.719 3.216 February 0.394 0.000 *** 12.522 3.150 0.145 0.006 ** 5.695 2.540 14.599 0.006 ** 2537.810 0.575 0.020 0.000 *** 0.565 3.541 March 0.357 0.000 *** 11.445 3.120 0.136 0.000 *** 4.890 2.784 16.750 0.000 *** 2408.300 0.696 0.016 0.000 *** 0.496 3.249 April 0.411 0.000 *** 14.420 2.848 0.148 0.000 *** 5.193 2.848 18.372 0.001 ** 2706.992 0.679 0.018 0.000 *** 0.885 2.084 May 2.786 0.038 * 156.333 1.782 3.326 0.085 229.623 55.364 0.009 ** 8929.337 0.620 0.402 0.204 23.573 June 0.342 0.706 140.131 1.353 0.352 127.000 40.000 0.007 ** 11151.979 0.359 0.245 0.052 12.154 July 2.286 0.065 127.271 0.947 0.141 66.112 0.000 0.940 9630.898 0.197 0.001 *** 6.301 3.126 August 0.783 0.372 114.250 1.022 0.083 51.276 1.600 0.826 7677.034 0.104 0.071 4.625 September 1.365 0.023 * 92.398 1.477 1.323 0.059 60.730 0.857 0.876 6753.755 0.135 0.025 * 5.227 2.587 Average for all months, 0.892 64.561 1.671 0.875 52.459 1.437 14.946 5517.838 0.339 0.114 5.117 2.215 for each station Average percentage change in median monthly flow for all months, weighted 0.360 by median annual flow for the Upper Mackenzie Camsell Band sub-basin * Percentage change in median monthly flow is only calculated for months with a statistically significant trend over time. For months without a significant trend, a value of zero is assigned for calculation of the overall station score.

WWF-Canada Watershed Report for the Lower Mackenzie Watershed. 20 Disclaimer: This analysis reflects currently accessible and available data that aligns with our nationally consistent suite of indicators, as of June 2015.

TABLE. RESULTS OF RECENT-TERM TREND ANALYSES FOR MEDIAN MONTHLY FLOW IN THE CENTRAL MACKENZIE – BLACKWATER LAKE (10H), GREAT BEAR (10J) AND CENTRAL MACKENZIE – THE RAMPARTS (10K) SUB-WATERSHEDS.

10H - Central Mackenzie- Blackwater Lake 10J - Great Bear 10K - Central Mackenzie- The Ramparts

10HB005 10JA002 10JC003 10KA001 10KB001

Start Year for Analysis 1979 Start Year for Analysis 1980 Start Year for Analysis 1980 Start Year for Analysis 1980 Start Year for Analysis 1980

Median Annual Flow (m3/s) 97.9 Median Annual Flow (m3/s) 93.75 Median Annual Flow (m3/s) 432.95 Median Annual Flow (m3/s) 5270.56 Median Annual Flow (m3/s) 39.07

October 1.707 0.003 ** 93.294 1.830 1.067 0.001 ** 107.282 0.994 0.000 0.987 452.980 -15.833 0.081 6619.942 0.814 0.003 ** 36.366 2.239 November 1.032 0.139 39.908 1.110 0.001 *** 103.282 1.075 0.130 0.836 428.808 -18.500 0.229 4170.260 0.139 0.044 * 17.952 0.772 December 0.482 0.056 31.684 1.075 0.000 *** 100.314 1.072 0.038 0.922 416.116 11.026 0.277 4308.620 0.106 0.052 13.365 January 0.618 0.008 ** 36.533 1.692 0.936 0.001 *** 87.037 1.076 0.205 0.736 397.560 26.316 0.012 * 3973.881 0.662 0.119 0.023 * 10.875 1.097 February 0.475 0.021 * 26.116 1.819 0.870 0.000 *** 79.815 1.090 -0.385 0.657 402.782 23.636 0.004 ** 3758.113 0.629 0.111 0.052 9.154 March 0.376 0.075 23.874 0.806 0.000 *** 72.754 1.108 0.436 0.338 410.534 20.179 0.002 ** 3440.322 0.587 0.092 0.134 8.410 April 0.523 0.010 ** 21.540 2.428 0.758 0.000 *** 66.359 1.142 0.507 0.406 394.572 21.974 0.001 *** 3530.061 0.622 0.077 0.130 8.512 May 2.704 0.079 198.050 0.782 0.000 *** 69.338 1.128 0.641 0.191 404.290 27.634 0.424 9960.583 3.411 0.002 ** 107.862 3.163 June -0.123 0.990 337.013 0.933 0.009 ** 97.763 0.955 0.200 0.632 446.609 22.457 0.302 13149.486 -1.223 0.264 122.097 July 0.969 0.744 321.105 0.899 0.016 * 115.141 0.781 -0.105 0.874 461.146 -4.396 0.808 11198.944 0.369 0.676 88.039 August -0.403 0.754 254.739 0.871 0.009 ** 116.771 0.746 -0.333 0.633 464.437 -9.524 0.373 9154.090 0.589 0.406 96.531

September 0.865 0.327 190.420 0.970 0.003 ** 111.360 0.871 -0.259 0.746 467.243 -7.538 0.541 7741.133 1.102 0.014 * 72.067 1.528 Average for all months, 0.769 131.190 0.647 0.923 93.935 1.003 0.090 428.923 0.000 8.119 6750.453 0.208 0.476 49.269 0.733 for each station

Average percentage change in median monthly Average percentage change in median monthly flow for all months, weighted by median annual 0.179 flow for all months, weighted by median annual 0.212 flow for the Great Bear sub-basin flow

WWF-Canada Watershed Report for the Lower Mackenzie Watershed. 21 Disclaimer: This analysis reflects currently accessible and available data that aligns with our nationally consistent suite of indicators, as of June 2015.

TABLE. RESULTS OF RECENT-TERM TREND ANALYSES FOR MEDIAN MONTHLY FLOW IN THE LOWER MACKENZIE (10L) AND PEEL (10M) SUB-WATERSHEDS.

10L - Lower Mackenzie 10M -Peel River

10LA002 10LC002 10MA001 10MC002

Start Year for Analysis 1980 Start Year for Analysis 1980 Start Year for Analysis 1985 Start Year for Analysis 1985

Median Annual Flow (m3/s) 28.6 Median Annual Flow (m3/s) 40.26 Median Annual Flow (m3/s) 50.05 Median Annual Flow (m3/s) 181.25

October 1.230 0.000 *** 60.575 2.030 0.789 0.052 73.546 1.000 0.051 93.500 3.529 0.012 * 374.500 0.940 November 0.393 0.000 *** 25.207 1.560 0.503 0.084 36.055 0.502 0.014 * 50.700 0.990 1.886 0.003 ** 179.750 1.050 December 0.268 0.000 *** 18.548 1.445 0.219 0.121 25.033 0.329 0.006 ** 37.150 0.890 1.277 6.040E-04 *** 124.000 1.030 January 0.288 0.000 *** 17.369 1.661 0.542 0.010 * 27.074 2.003 0.312 6.940E-05 *** 27.150 1.150 1.159 5.000E-05 *** 98.580 1.118 February 0.235 0.000 *** 14.552 1.612 0.494 0.005 ** 23.925 2.065 0.308 9.750E-05 *** 23.000 1.340 1.130 2.290E-05 *** 90.580 1.250 March 0.195 0.000 *** 13.244 1.472 0.613 0.000 *** 19.975 3.071 0.200 0.002 ** 21.150 0.950 1.044 2.050E-05 *** 83.900 1.240 April 0.160 0.000 *** 13.633 1.170 0.440 0.003 ** 18.475 2.384 0.161 0.056 20.750 1.090 2.260E-05 *** 85.450 1.280 May 0.564 0.753 164.343 2.509 0.052 89.827 7.500 0.038 * 201.500 2.490 4.000 0.513 1025.000 June -2.500 0.174 357.090 -1.345 0.322 280.940 -6.800E+00 0.002 ** 394.750 1.770 -3.060E-01 4.380E-04 *** 1715.000 1.790 July -0.127 0.911 219.323 0.348 0.683 187.537 1.842 0.182 243.000 2.700 0.653 1015.000 August -1.372 0.390 223.067 0.000 0.973 152.001 0.800 0.687 252.500 -2.920 0.515 970.250

September 1.427 0.134 164.992 0.976 0.136 114.840 2.563 0.014 * 239.500 1.070 3.567 0.286 827.250 0.430 Average for all months, 0.063 107.662 0.913 0.507 87.436 0.794 0.726 133.721 0.888 1.513 549.105 0.844 for each station

Average percentage change in median monthly Average percentage change in median monthly flow for all months, weighted by median annual 0.843 flow for all months, weighted by median annual 0.853 flow for the Lower Mackenzie sub-basin flow for the Peel River sub-basin

WWF-Canada Watershed Report for the Lower Mackenzie Watershed. 22 Disclaimer: This analysis reflects currently accessible and available data that aligns with our nationally consistent suite of indicators, as of June 2015.

TRENDS IN ANNUAL FLOW FOR THE LOWER MACKENZIE

TABLE . RESULTS OF LINEAR REGRESSION ANALYSES FOR LONG-TERM TRENDS IN MEDIAN ANNUAL FLOW IN THE LOWER MACKENZIE BASIN, BY SUB- WATERSHED.

Intercept Intercept Intercept Slope Slope Slope T-Test Adjusted F-Test F-Test Sub-Basin Station Start Year Intercept Standard T-Test T-Test Slope Standard T-Test p-value R-Squared Static p-value Error Statistic p-value Error Statistic

07N - Slave 07NB001 1959 22720.209 9890.687 2.297 0.026 -9.803 4.981 -1.968 0.054 0.051 3.873 0.054

07O - Hay 07OB001 1963 -1075.624 1055.056 -1.019 0.313 0.572 0.531 1.078 0.286 0.003 1.163 0.286 07R - 07RD001 1963 343.714 516.233 0.666 0.509 -0.111 0.260 -0.426 0.672 -0.017 0.182 0.672 Lockhart 07S - Northeastern 07SB003 1941 -232.829 100.619 -2.314 0.024 0.131 0.051 2.575 0.012 * 0.074 6.628 0.012 * Great Slave Lake

07T - Marian 07TA001 1975 -1643.210 221.539 -7.417 0.000 0.841 0.111 7.572 0.000 *** 0.604 57.334 0.000 ***

10AA001 1964 -1411.493 956.651 -1.475 0.147 0.819 0.481 1.703 0.095 0.038 2.900 0.095 10A - Upper 10AB001 1964 -37.572 465.998 -0.081 0.936 0.066 0.234 0.280 0.781 -0.020 0.078 0.781 Liard 10AC005 1964 -20.018 40.173 -0.498 0.621 0.014 0.020 0.707 0.483 -0.011 0.500 0.483

10B - Central 10BE001 1944 5141.793 2407.640 2.136 0.036 -2.234 1.217 -1.836 0.071 0.034 3.370 0.071 Liard

10C - Fort 10CD001 1944 2480.605 709.034 3.499 0.001 -1.196 0.359 -3.334 0.001 ** 0.133 11.114 0.001 ** Nelson 10E - Lower 10ED001 1942 28411.704 6078.490 4.674 0.000 -13.644 3.075 -4.436 0.000 *** 0.211 19.682 0.000 *** Liard 10F - Upper Mackenzie- 10FA002 1969 -1503.392 381.360 -3.942 0.000 0.766 0.192 3.999 0.000 *** 0.259 15.992 0.000 *** Mills Lake

10G - Upper Mackenzie- 10GC001 1960 18223.065 27005.361 0.675 0.503 -6.022 13.597 -0.443 0.660 -0.016 0.196 0.660 Camsell Band

10H -Central Mackenzie- 10HB005 1975 -17132.854 2478.636 -6.912 0.000 8.679 1.243 6.980 0.000 *** 0.563 48.721 0.000 *** Blackwater Lake

10J - Great 10JA002 1963 -1863.412 468.890 -3.974 0.000 0.992 0.236 4.204 0.000 *** 0.254 17.674 0.000 *** Bear 10JC003 1963 -1181.274 984.189 -1.200 0.236 0.868 0.495 1.753 0.086 0.041 3.072 0.086

10K - Central Mackenzie- 10KA001 1963 70493.231 45134.367 1.562 0.125 -31.842 22.709 -1.402 0.167 0.019 1.966 0.167 The Remparts

10L - Lower 10LC002 1972 -1737.612 764.384 -2.273 0.029 0.903 0.384 2.353 0.024 * 0.102 5.538 0.024 * Mackenzie 10MA001 1969 -1859.916 949.066 -1.960 0.057 0.969 0.478 2.027 0.049 * 0.016 1.723 0.049 * 10M - Peel River 10MC002 1969 -7365.972 2113.220 -3.486 0.001 3.809 1.062 3.587 0.001 *** 0.140 7.010 0.001 ***

WWF-Canada Watershed Report for the Lower Mackenzie Watershed. 23 Disclaimer: This analysis reflects currently accessible and available data that aligns with our nationally consistent suite of indicators, as of June 2015.

TABLE . RESULTS OF MANN-KENDALL NON-PARAMETRIC TREND ANALYSIS FOR LONG-TERM TRENDS IN MEDIAN ANNUAL FLOW IN THE LOWER MACKENZIE BASIN, BY SUB-WATERSHED.

Median Median Average Average Average Percentage Theil -Sen Mann-Kendall Mann-Kendall Test Median Annual Percentage Percentage Sub-Basin Station Start Year Change in Slope Test Statistic p-value Flow (m3/s) Change in Change in Annual Flow for Annual Flow Annual Flow by entire basin sub-basin

07N - Slave 07NB001 1959 -5.278 -175.000 0.194 2839.74

07O - Hay 07OB001 1963 0.424 136.000 0.259 47.93

07R - Lockhart 07RD001 1963 -0.071 -35.000 0.776 106.61

07S - Northeastern 07SB003 1941 0.030 114.000 0.575 40.56 Great Slave Lake

07T - Marian 07TA001 1975 0.856 402.000 0.000 *** 26.5 3.23 3.23

10AA001 1964 0.909 195.000 0.094 215.37 10A - Upper Liard 10AB001 1964 0.173 97.000 0.408 26.18 10AC005 1964 0.018 108.000 0.356 8.17

10B - Central Liard 10BE001 1944 -0.066 -16.000 0.938 706.67

10C - Fort Nelson 10CD001 1944 -0.800 -517.000 0.005 ** 116.93 0.68 0.68

10E - Lower Liard 10ED001 1942 -10.513 -638.000 0.002 ** 1287.65 0.82 0.82

10F - Upper 0.143 Mackenzie-Mills 10FA002 1969 0.586 331.000 0.001 *** 13.680 4.282 4.282 Lake

10G - Upper Mackenzie- 10GC001 1960 2.980 23.000 0.866 5414.490 Camsell Band

10H -Central Mackenzie- 10HB005 1960 7.500 393.000 0.000 *** 91.620 8.186 8.186 Blackwater Lake

10JA002 1963 0.989 437.000 0.000 *** 91.490 1.082 10J - Great Bear 0.300 10JC003 1963 0.697 155.000 0.197 469.900 0.148

10K - Central Mackenzie- The 10KA001 1963 -24.667 -118.000 0.328 6101.570 Remparts

10L - Lower 10LC002 1972 0.808 259.000 0.004 ** 42.760 1.889 1.889 Mackenzie 10MA001 1969 0.192 79.000 0.430 50.05 1.249 10M - Peel River 10MC002 1969 2.889 380.000 0.000 *** 181.25 1.59

WWF-Canada Watershed Report for the Lower Mackenzie Watershed. 24 Disclaimer: This analysis reflects currently accessible and available data that aligns with our nationally consistent suite of indicators, as of June 2015.

FIGURE. TIME-SERIES OF LONG-TERM TRENDS IN MEDIAN ANNUAL FLOW FOR THE LOWER MACKENZIE BASIN, BY SITE.

WWF-Canada Watershed Report for the Lower Mackenzie Watershed. 25 Disclaimer: This analysis reflects currently accessible and available data that aligns with our nationally consistent suite of indicators, as of June 2015.

WWF-Canada Watershed Report for the Lower Mackenzie Watershed. 26 Disclaimer: This analysis reflects currently accessible and available data that aligns with our nationally consistent suite of indicators, as of June 2015.

WWF-Canada Watershed Report for the Lower Mackenzie Watershed. 27 Disclaimer: This analysis reflects currently accessible and available data that aligns with our nationally consistent suite of indicators, as of June 2015.

HYDROLOGICAL ALTERATION IN THE LOWER MACKENZIE BASIN

TABLE . NON-PARAMETRIC COMPARISON OF VARIANCE FOR RECENT VS. HISTORICAL MONTHLY FLOW IN THE LOWER MACKENZIE BASIN.

Historic Recent Fligner-Killeen Mann-Whitney

Percentage Median Median Change in Average Average Median Absolute Median Absolute Montly Percentage Median Percentage Number of Number of Monthly Deviation Monthly Deviation Flow Change Annual Change Station Month Years of Years of Test Statistic p-value Test Statistic p-value Flow in Monthly Flow in Monthly Between Across Flow Across Sampling Sampling (m3/s) Flow (m3/s) Flow the Two Months by (m3/s) Months for (m3/s) (m3/s) Time station sub-basin Periods

May 26 4530 1556.73 28 4570 1052.65 69.8037 6.5509E-17 *** 345918.5 0.7860 0.88%

June 26 5800 1497.43 28 4850 815.43 116.7560 3.2465E-27 *** 465786 7.6340E-49 *** 16.38%

July 26 5810 1423.30 28 4490 978.52 64.2021 1.1229E-15 *** 501030.5 7.2664E-53 *** 22.72%

August 26 4785 1475.19 28 3700 593.04 130.1587 3.7830E-30 *** 491081.5 2.2977E-46 *** 22.68%

September 26 4080 830.26 28 3400 504.08 55.8028 8.0116E-14 *** 480464 1.4270E-60 *** 16.67%

October 26 3820 711.65 28 3230 518.91 20.8943 4.8534E-06 *** 503997 6.8656E-55 *** 15.45% 07N - Slave 07NB001 20.5% 2839.74 November 26 2450 815.43 28 2400 548.56 32.7338 1.0568E-08 *** 344227 0.0772 2.04%

December 26 2000 400.30 28 2380 355.82 4.4848 0.0342 * 159011 4.6230E-83 *** 19.00%

January 25 2020 415.13 28 2430 474.43 0.8554 0.3550 144827.5 1.4745E-88 *** 20.30%

February 25 1980 652.34 28 2530 415.13 22.9764 1.6401E-06 *** 101584 1.1071E-100 *** 27.78%

March 25 1620 667.17 28 2340 429.95 68.9468 1.0115E-16 *** 119828.5 1.2064E-112 *** 44.44%

April 25 1780 756.13 28 2505 615.28 0.5144 0.4732 134272 4.8969E-87 *** 40.73%

June 25 206 102.30 25 236 128.99 7.3585 0.0067 ** 239879 0.0001 *** 14.56%

July 25 143 102.60 25 180 118.90 10.5282 0.0012 ** 252261 7.6479E-07 *** 25.87%

August 25 102 93.26 25 155 112.38 25.6017 4.1968E-07 *** 215525.5 6.3920E-22 *** 51.96%

September 25 66.4 77.32 25 119.5 100.08 0.0086 0.9259 229311.5 5.9423E-10 *** 79.97%

October 25 56 58.12 25 83 74.13 8.6684 0.0032 ** 254159.5 1.6217E-07 *** 48.21%

November 25 20.95 19.26 25 40.9 35.66 38.1360 6.5981E-10 *** 212167 1.7829E-16 *** 95.23% 07O - Hay 07OB001 85.1% 47.92 December 25 7.79 5.38 25 14 10.38 142.0280 9.5888E-33 *** 182105 4.8643E-41 *** 79.72%

January 24 3.4 2.11 25 8.06 4.46 119.2977 9.0134E-28 *** 123726 1.2282E-82 *** 137.06%

February 24 2.53 1.76 25 6.12 3.53 140.6930 1.8779E-32 *** 87487 5.6366E-93 *** 141.90%

March 24 1.71 1.20 25 4.92 2.58 152.4050 5.1678E-35 *** 89408 8.3489E-120 *** 187.72%

April 24 3.45 3.39 25 8.735 7.94 51.9868 5.5875E-13 *** 176683.5 1.8775E-30 *** 153.19%

May 24 382 217.20 25 361 204.60 12.5604 0.0004 *** 308994 0.0155 * 5.50%

WWF-Canada Watershed Report for the Lower Mackenzie Watershed. 28 Disclaimer: This analysis reflects currently accessible and available data that aligns with our nationally consistent suite of indicators, as of June 2015.

April 25 82.1 16.46 25 86.7 17.79 2.4629 0.1166 215137 2.7722E-09 *** 5.60% May 24 82.95 17.42 25 80.8 18.24 6.3375 0.0118 * 289088 0.9266 2.59% June 25 106 20.76 25 117 34.10 68.0600 1.5860E-16 *** 222989 8.4556E-10 *** 10.38% July 25 128 26.69 25 138 37.07 44.5626 2.4636E-11 *** 227576 1.5094E-16 *** 7.81% August 25 151 28.17 25 163 57.82 59.6177 1.1520E-14 *** 225134.5 6.1409E-14 *** 7.95% September 25 157 29.65 25 163.5 61.53 133.3221 7.6871E-31 *** 226120 4.9342E-11 *** 4.14% 07R - Lockhart 07RD001 5.2% 106.61 October 25 151 31.13 25 150 51.89 49.1344 2.3901E-12 *** 254406 2.1022E-05 *** 0.66% November 23 141 31.13 25 135 41.51 12.1925 0.0005 *** 229326.5 0.0002 *** 4.26% December 25 129 26.69 25 127 34.10 1.0603 0.3032 251926.5 0.0016 ** 1.55% January 23 113 25.20 25 118 28.17 0.8136 0.3671 240017 1.1839E-05 *** 4.42% February 23 100.5 24.46 25 108 22.83 9.3745 0.0022 ** 189785 1.0754E-05 *** 7.46% March 24 89.5 20.02 25 96.5 20.02 6.0159 0.0142 * 225611.5 7.2432E-10 *** 7.82% January 36 20.6 8.30 29 25.6 8.30 0.2343 0.6284 396823 2.2015E-13 *** 24.27% February 36 18.2 6.08 29 23.7 7.12 2.5534 0.1101 296220 1.7699E-26 *** 30.22% March 36 16.8 4.60 29 21.9 6.67 26.7501 2.3154E-07 *** 317581.5 8.7807E-41 *** 30.36% April 36 15.9 3.11 29 20.35 6.00 72.3840 1.7714E-17 *** 275935.5 2.2919E-48 *** 27.99% May 36 19 6.52 30 22.05 9.86 27.5836 1.5045E-07 *** 444841.5 2.5632E-08 *** 16.05% 07S - Northeastern June 36 27.4 13.49 30 27.25 12.75 12.0130 0.0005 *** 482199.5 0.8297 0.55% 07SB003 16.3% 40.56 Great Slave July 36 34 27.28 30 29.8 25.06 5.7143 0.0168 * 545838 0.0389 * 12.35% Lake August 36 43.9 20.16 30 34.1 27.28 50.9534 9.4583E-13 *** 597950.5 5.5261E-12 *** 22.32% September 35 33.7 16.46 30 30.05 16.68 0.5647 0.4524 570215.5 3.1872E-15 *** 10.83% October 35 26.3 9.79 30 27.5 13.12 0.4918 0.4831 580280.5 5.9409E-09 *** 4.56% November 35 24.6 10.08 30 27.6 10.97 0.2125 0.6448 482885.5 0.2364 12.20% December 34 23.15 10.16 30 26.9 10.67 0.0987 0.7534 456734 0.0154 * 16.20% February 19 15.6 4.89 19 30.8 8.90 55.0161 1.1954E-13 *** 38672.5 2.3479E-91 *** 97.44% March 19 16 6.82 19 33.6 9.04 40.6628 1.8089E-10 *** 41357 4.8391E-109 *** 110.00% April 19 19.5 5.78 19 39 6.97 2.9722 0.0847 47255 2.2788E-82 *** 100.00% July 19 36.65 8.23 19 53.6 9.34 10.2242 0.0014 ** 84693.5 1.2997E-46 *** 46.25% August 19 32.5 7.26 19 50.3 9.19 9.0733 0.0026 ** 84907 5.7680E-52 *** 54.77% September 19 28.5 6.38 19 47.25 9.49 10.2383 0.0014 ** 73435.5 9.9954E-58 *** 65.79% 07T - Marian 07TA001 78.4% 26.50 October 19 25.4 5.93 19 45.2 11.27 40.6963 1.7782E-10 *** 69934 2.3496E-70 *** 77.95% November 19 21.9 5.78 19 40.55 10.90 64.6621 8.8908E-16 *** 57312.5 8.4017E-80 *** 85.16% December 19 19.5 5.49 19 38.4 11.27 55.1550 1.1139E-13 *** 58731.5 5.6064E-86 *** 96.92% January 18 16.45 3.93 19 32.5 9.04 75.9901 2.8508E-18 *** 54707 4.0685E-85 *** 97.57% May 18 29.7 10.67 19 47.9 9.04 0.0011 0.9735 59507.5 7.9697E-72 *** 61.28% June 18 38.4 9.34 19 56.9 8.60 2.7528 0.0971 69403 8.0746E-52 *** 48.18%

WWF-Canada Watershed Report for the Lower Mackenzie Watershed. 29 Disclaimer: This analysis reflects currently accessible and available data that aligns with our nationally consistent suite of indicators, as of June 2015.

June 28 1270 355.824 25 1145 437.367 10.693254 0.0010753 ** 359700 1.00E-06 *** 22.9% July 28 779 269.8332 25 675 250.5594 3.0314367 0.0816657 413470 9.49E-16 *** 7.1% August 28 445 115.6428 25 411 145.2948 23.827686 1.05E-06 *** 386148 2.13E-07 *** 25.6% September 28 379 87.4734 25 392.5 119.3493 40.518292 1.95E-10 *** 300199.5 0.1053631 36.4% October 28 314 88.956 25 329 105.2646 16.11887 5.95E-05 *** 308392 0.0035881 ** 18.3% November 28 167 50.4084 25 173 54.8562 4.7242251 0.0297406 * 297510.5 0.0556627 8.8% 10AA001 10.2% 215.4 December 28 119 26.6868 25 130 25.2042 2.5808937 0.1081606 271027.5 1.01E-11 *** 5.6% January 27 94.6 18.5325 25 104 17.7912 0.0007321 0.9784133 211547.5 1.34E-33 *** 4.0% February 27 76.2 15.12252 25 88 12.89862 15.32507 9.05E-05 *** 135291 3.29E-61 *** 14.7% March 27 65.4 13.19514 25 78.1 12.00906 0.201118 0.65382 168288.5 1.06E-62 *** 9.0% April 27 72.35 17.49468 25 85 19.2738 48.308772 3.64E-12 *** 184703.5 6.69E-41 *** 10.2% May 27 436 375.0978 25 494 358.7892 3.0978492 0.0783958 270662 9.02E-09 *** 4.3%

December 25 44 10.67472 25 51 12.30558 31.876547 1.64E-08 *** 190706.5 2.25E-30 *** 15.3% March 24 22.4 3.40998 25 24.9 4.29954 2.2056602 0.137505 183544 1.51E-34 *** 26.1% April 24 22.7 4.00302 25 27.3 7.413 113.48565 1.69E-26 *** 154999.5 2.30E-45 *** 85.2% May 25 133 113.27064 25 160 118.75626 9.1191312 0.0025295 ** 238347 4.66E-11 *** 4.8% June 25 541 163.086 25 537 198.6684 10.830259 0.0009985 *** 278985 0.7871844 21.8%

10A - Upper July 25 365 118.608 25 332 131.9514 0.9297539 0.3349269 344726.5 4.64E-07 *** 11.3% 10AB001 25.2% 26.2 12.23% Liard August 25 219 57.8214 25 202 83.0256 62.99319 2.07E-15 *** 330261 0.0006762 *** 43.6% September 25 166 45.2193 25 184 45.9606 17.388466 3.05E-05 *** 230403.5 1.35E-09 *** 1.6% October 25 133 34.0998 25 148 47.4432 57.452888 3.46E-14 *** 252106.5 4.47E-08 *** 39.1% November 25 70.8 18.97728 25 81.05 26.31615 26.92443 2.12E-07 *** 221737.5 1.44E-09 *** 38.7% January 24 31.1 6.37518 25 36.7 7.26474 9.5371016 0.0020136 ** 172829.5 5.22E-36 *** 14.0% December 23 25.5 4.59606 25 29.5 5.63388 12.594905 0.0003868 *** 133128.5 5.86E-41 *** 22.6%

January 24 3.2 0.548562 25 3.3 0.770952 39.183855 3.86E-10 *** 275396 0.1310532 40.5% February 24 2.75 0.459606 25 2.83 0.726474 24.394529 7.85E-07 *** 208525 2.83E-05 *** 58.1% March 24 2.39 0.467019 25 2.5 0.59304 16.268059 5.50E-05 *** 246303 8.90E-07 *** 27.0% April 24 2.27 0.533736 25 2.85 0.7413 52.605688 4.08E-13 *** 148634.5 2.53E-50 *** 38.9% May 24 13.45 14.648088 25 25.3 27.042624 116.38919 3.91E-27 *** 209035.5 1.78E-20 *** 84.6% June 24 69.95 28.54005 25 67.05 31.20873 4.5714148 0.0325097 * 290445 0.0119761 * 9.4% 10AC005 25.6% 8.2 July 24 35.85 17.34642 25 30.4 14.826 16.562204 4.71E-05 *** 347941 2.98E-12 *** 14.5% August 24 18.9 8.00604 25 15.8 6.07866 8.1345839 0.0043429 ** 342894.5 1.68E-10 *** 24.1% September 24 19.65 8.30256 25 18.4 10.52646 40.789128 1.70E-10 *** 288915 0.0200824 * 26.8% October 24 15.3 6.07866 25 14.7 5.78214 6.8922724 0.0086569 ** 309735.5 0.0121347 * 4.9% November 24 7.02 1.808772 25 7.4 2.07564 1.8285154 0.176303 253591.5 0.0437136 * 14.8% December 24 4.53 1.082298 25 4.9 1.03782 2.8858346 0.0893617 232647.5 7.40E-11 *** 4.1%

WWF-Canada Watershed Report for the Lower Mackenzie Watershed. 30 Disclaimer: This analysis reflects currently accessible and available data that aligns with our nationally consistent suite of indicators, as of June 2015.

July 33 2400 859.908 35 2220 800.604 3.8907785 0.0485519 * 589766 0.0012284 ** 6.9%

August 33 1440 429.954 35 1370 311.346 33.525966 7.03E-09 *** 609476 9.54E-05 *** 27.6%

September 33 1135 332.1024 35 1200 281.694 8.8189097 0.0029812 ** 458573 4.20E-06 *** 15.2%

June 32 3620 1245.384 35 3495 1156.428 2.0994323 0.1473538 504129 0.2984492 7.1%

October 32 876.5 286.8831 35 980 281.694 0.0046055 0.9458941 408699.5 2.47E-21 *** 1.8%

10B - Central November 30 411 154.1904 35 511 131.9514 22.61375 1.98E-06 *** 283250.5 3.69E-43 *** 14.4% 10BE001 12.2% 706.7 Liard February 27 227 53.3736 35 277 66.717 18.766112 1.48E-05 *** 216736.5 3.74E-47 *** 25.0%

May 31 1400 1110.4674 35 1310 819.8778 17.679825 2.61E-05 *** 499538.5 0.1876674 26.2%

December 26 320 71.1648 35 367 69.6822 0.4700288 0.4929739 238790 4.31E-64 *** 2.1%

January 26 257 63.7518 35 307 69.6822 5.4375863 0.0197079 * 257856 3.26E-46 *** 9.3%

March 26 210 34.0998 35 253 48.9258 10.519419 0.0011813 ** 228666 1.31E-70 *** 43.5%

April 27 232 60.7866 35 270.5 60.0453 2.630158 0.1048513 279851.5 2.75E-31 *** 1.2%

August 34 303 137.8818 33 317 140.847 0.9083415 0.3405549 517335.5 0.1474186 2.2%

September 34 188.5 83.7669 33 220 115.6428 52.685865 3.91E-13 *** 403117.5 5.11E-15 *** 38.1%

October 32 108 45.9606 33 116 50.4084 21.731312 3.14E-06 *** 433545.5 1.54E-08 *** 9.7%

November 26 52.1 26.83506 33 57.5 18.5325 20.931428 4.76E-06 *** 322833 8.94E-05 *** 30.9%

December 23 28.9 9.6369 33 37.5 10.3782 4.5977019 0.0320148 * 215723.5 1.23E-47 *** 7.7%

10C - Fort January 23 20 5.63388 33 25.8 6.22692 6.1975419 0.0127928 * 199439.5 3.32E-58 *** 10.5% 10CD001 10.4% 116.9 Nelson February 26 16.6 3.55824 33 21.5 3.85476 0.6556873 0.4180866 102143.5 4.43E-117 *** 8.3%

March 26 15.6 3.40998 33 20 3.7065 1.2844656 0.2570704 138695 8.26E-124 *** 8.7%

April 27 24.4 17.34642 33 32 18.08772 0.4384223 0.5078849 305251 8.99E-14 *** 4.3%

May 32 249 150.4839 33 272 189.7728 5.7596753 0.0163981 * 477462 0.12527 26.1%

June 33 425 191.2554 33 515 203.1162 0.3576313 0.5498247 385499 6.05E-16 *** 6.2%

July 33 487 238.6986 33 499 188.2902 12.604661 0.0003848 *** 503259 0.1343262 21.1%

October 32 1350 415.128 36 1600 504.084 21.337502 3.85E-06 *** 384173.5 5.79E-32 *** 21.4%

September 31 1730 548.562 36 2030 607.866 11.312965 0.0007697 *** 322890 1.70E-40 *** 10.8%

November 19 609 240.1812 36 560 237.216 4.0538484 0.0440708 * 305244 8.71E-09 *** 1.2%

May 30 3200 2031.162 36 3450 1630.86 22.466584 2.14E-06 *** 440548 7.83E-05 *** 19.7%

June 29 5170 1527.078 36 5460 1853.25 16.626078 4.55E-05 *** 418329.5 3.12E-05 *** 21.4%

10E- Lower July 29 3880 1690.164 36 3980 1452.948 2.8698867 0.0902512 459152 0.0199471 * 14.0% 10ED001 16.9% 1287.7 Liard August 30 2290 726.474 36 2490 726.474 2.7763804 0.0956641 429868.5 7.71E-08 *** 0.0%

April 15 318.5 68.9409 36 392.5 120.8319 59.651818 1.13E-14 *** 148501.5 2.48E-26 *** 75.3%

December 15 481 103.782 36 530 102.2994 12.102896 0.0005034 *** 168334.5 3.77E-26 *** 1.4%

January 14 385 80.0604 34 425 78.5778 5.0849628 0.0241342 * 142008.5 1.18E-30 *** 1.9%

February 14 320 50.4084 34 362 62.2692 5.7838807 0.0161738 * 103657.5 8.79E-40 *** 23.5%

March 14 294 37.065 35 330 41.5128 6.9189608 0.0085287 ** 121841.5 1.54E-46 *** 12.0%

WWF-Canada Watershed Report for the Lower Mackenzie Watershed. 31 Disclaimer: This analysis reflects currently accessible and available data that aligns with our nationally consistent suite of indicators, as of June 2015.

July 22 45.2 22.832 22 75.45 49.741 83.816 0.000 *** 143226.500 1.5982E-29 *** 66.92%

August 22 30.6 20.163 22 60.9 50.853 126.318 0.000 *** 148612.000 8.1569E-31 *** 99.02%

September 22 26.05 21.572 22 50.85 54.856 246.870 0.000 *** 136841.000 1.4139E-31 *** 95.20%

October 22 17.15 15.938 22 36.75 38.325 275.686 0.000 *** 146316.500 1.9793E-32 *** 114.29%

November 22 4.18 3.951 22 17.2 15.197 304.774 0.000 *** 106482.500 3.8033E-58 *** 311.48%

10F - Upper December 22 1.5 1.658 22 6.935 7.376 390.535 0.000 *** 101467.500 1.2868E-72 *** 362.33%

Mackenzie- 10FA002 265.0% 13.68

Mills Lake January 21 0.58 0.713 22 3.495 3.783 433.057 0.000 *** 88472.500 1.5428E-80 *** 502.59%

February 21 0.43 0.517 22 2.72 2.555 370.267 0.000 *** 74729.000 5.4741E-72 *** 532.56%

March 21 0.35 0.460 22 2.67 2.417 241.963 0.000 *** 100927.500 1.5156E-66 *** 662.86%

April 21 1.6 2.239 22 8.17 8.933 113.066 0.000 *** 125275.000 4.6504E-35 *** 410.63%

May 21 113 81.543 22 120 78.430 0.003 0.959 206288.000 0.0254 * 6.19%

June 21 96.2 53.077 22 112 76.947 24.575 0.000 *** 183333.000 0.0002 *** 16.42%

August 47 9490 1793.946 27 9660 1571.556 12.029 0.001 *** 570723.500 0.0305 * 1.79%

September 48 8240 1349.166 27 8245 1423.296 1.805 0.179 513361.000 0.0080 ** 0.06%

October 44 7140 1141.602 27 7370 1052.646 10.486 0.001 ** 437522.000 0.0004 *** 3.22%

June 46 13300 2816.940 27 14550 2594.550 1.690 0.194 373870.500 0.0000 *** 9.40%

July 47 12300 2668.680 27 12500 2668.680 1.528 0.216 538361.500 0.0027 * 1.63%

10G - Upper May 26 10500 3854.760 27 11600 3409.980 18.449 0.000 *** 243522.000 8.6668E-15 *** 10.48%

Mackenzie- 10GC001 14.3% 5414.49

Camsell Band December 25 2830 459.606 27 3410 770.952 110.405 0.000 *** 151276.000 1.9915E-63 *** 20.49%

January 24 2530 533.736 27 3230 563.388 4.976 0.026 132577.500 9.6619E-80 *** 27.67%

March 24 2230 474.432 27 2890 385.476 0.140 0.708 104355.500 1.1763E-108 *** 29.60%

April 26 2610 696.822 27 3250 711.648 8.312 0.004 * 135994.500 3.3945E-73 *** 24.52%

November 23 4390 1853.250 27 3955 1682.751 0.134 0.715 301475.500 0.0084 * 9.91%

February 25 2250 548.562 27 2990 385.476 2.578 0.108 89702.000 1.8005E-95 *** 32.89%

September 18 197.5 70.424 19 231 75.613 0.895 0.344 117709.000 1.3797E-05 *** 16.96%

May 18 214.5 137.141 18 232.5 121.573 2.742 0.098 49628.500 0.0074 ** 8.39% 10H - Central June 18 460 198.668 19 396.5 205.340 0.038 0.846 158947.500 0.0017 ** 13.80% Mackenzie 10HB005 15.53% 91.62 Blackwater July 18 413 160.121 19 378 163.086 1.485 0.223 140290.500 0.0154 * 8.47% Lake

August 18 330 114.160 19 292.5 112.678 0.916 0.339 157510.000 1.0943E-05 *** 11.36%

October 16 98 37.732 19 131.5 45.219 8.512 0.004 ** 55653.500 1.4736E-18 *** 34.18%

WWF-Canada Watershed Report for the Lower Mackenzie Watershed. 32 Disclaimer: This analysis reflects currently accessible and available data that aligns with our nationally consistent suite of indicators, as of June 2015.

October 31 107 27.725 19 132 38.548 15.627 0.000 *** 183001.000 3.2574E-29 *** 23.36% November 31 106 22.387 19 131 35.582 25.735 0.000 *** 162995.500 4.8550E-36 *** 23.58% December 31 104 17.050 19 126 34.100 35.821 0.000 *** 168497.500 6.9104E-41 *** 21.15% January 30 94.6 16.902 19 118 25.204 23.254 0.000 *** 149603.500 2.3801E-49 *** 24.74% February 30 85.8 16.976 18 108 18.236 19.397 0.000 *** 105287.500 2.4576E-56 *** 25.87% March 30 77.6 16.753 18 98.25 15.938 16.424 0.000 *** 120321.500 2.3186E-67 *** 26.61% 10JA002 21.8% 91.49 April 30 70.2 14.233 18 89.2 10.823 10.789 0.001 ** 107646.000 3.0483E-70 *** 27.07% May 30 71.8 15.716 19 91.1 14.678 1.289 0.256 142035.000 1.9650E-56 *** 26.88% June 30 97.8 31.431 19 119 29.578 0.758 0.384 179210.500 1.9063E-22 *** 21.68% July 30 116 32.617 19 132 35.582 13.091 0.000 ** 214072.500 6.9230E-13 *** 13.79% August 30 113 31.135 19 128 38.548 15.044 0.000 ** 212824.500 2.2865E-13 *** 13.27%

10J - Great September 30 109.5 31.876 19 125 35.582 12.881 0.000 ** 188609.000 1.1120E-17 *** 14.16% 9.04% Bear April 28 496 41.513 17 525 62.269 124.861 0.000 *** 139578.000 1.2959E-16 *** 5.85% May 30 507 37.065 18 544.5 46.702 55.382 0.000 *** 172856.500 5.1376E-19 *** 7.40% June 32 538 59.304 19 579 56.339 9.389 0.002 ** 201389.500 2.3979E-12 *** 7.62% July 31 556 59.304 19 602 48.926 0.359 0.549 232864.500 1.5307E-05 *** 8.27% August 31 581.5 62.269 19 613 47.443 3.708 0.054 247439.000 0.0044 ** 5.42% September 33 586 62.269 19 620 50.408 0.000 0.998 236653.000 1.1250E-05 *** 5.80% 10JC003 6.6% 469.9 October 31 561 53.374 19 601 57.821 9.608 0.002 ** 226783.000 3.7065E-09 *** 7.13% November 30 527 57.821 19 565 63.752 15.329 0.000 *** 187809.500 4.0438E-07 *** 7.21% December 28 525 51.891 17 566 60.787 27.504 0.000 *** 162975.000 2.4200E-09 *** 7.81% February 27 508 47.443 15 540 62.269 63.552 0.000 *** 102222.000 3.3303E-11 *** 6.30% January 26 518 45.961 15 539 62.269 31.465 0.000 *** 104518.500 2.6787E-09 *** 4.05% March 28 504 50.408 17 533 51.891 48.791 0.000 *** 146695.500 4.5396E-16 *** 5.75% May 31 12200 7590.912 25 15100 7264.740 0.362 0.547 211204.000 1.3399E-10 *** 23.77% June 39 17400 3113.460 25 17400 3854.760 66.634 0.000 *** 407763.000 0.4664 0.00% July 40 15500 3261.720 25 14600 3706.500 54.124 0.000 *** 539840.500 1.5135E-10 *** 5.81%

September 40 10500 1334.340 25 10000 2075.640 125.193 0.000 *** 467865.500 1.2974E-07 *** 4.76%

October 36 9000 1334.340 25 8470 1482.600 45.723 0.000 *** 494056.000 1.2152E-21 *** 5.89%

10K - Central August 38 12300 2075.640 25 11500 2075.640 10.411 0.001 ** 547359.000 2.9492E-19 *** 6.50% Mackenzie-The 10KA001 13.5% 6101.57

Ramparts November 26 4995 2246.139 25 4830 2016.336 6.243 0.012 * 280740.500 0.0496 * 3.30%

March 23 2950 578.214 25 3610 429.954 12.260 0.000 *** 91489.500 2.3520E-103 *** 22.37%

December 24 3680 822.843 25 4140 948.864 11.204 0.001 *** 201862.000 6.7276E-24 *** 12.50%

January 22 3370 800.604 25 4210 637.518 0.848 0.357 95571.000 2.2189E-95 *** 24.93% February 22 3000 637.518 25 3910 504.084 16.707 0.000 *** 74184.500 3.0024E-96 *** 30.33% April 22 3170 637.518 25 3850 696.822 49.776 0.000 *** 82605.500 1.1601E-96 *** 21.45%

WWF-Canada Watershed Report for the Lower Mackenzie Watershed. 33 Disclaimer: This analysis reflects currently accessible and available data that aligns with our nationally consistent suite of indicators, as of June 2015.

March 21 16 11.327 20 28.4 16.531 39.887 0.000 *** 96367.500 2.2218E-52 *** 77.50%

May 21 72.2 84.805 20 161.5 195.555 34.741 0.000 *** 152918.000 1.5587E-07 *** 123.68%

August 21 210 60.787 20 220.5 61.528 0.320 0.572 186098.500 0.3098 5.00%

October 21 95.8 29.949 20 109.5 51.150 39.676 0.000 *** 152655.000 2.7274E-10 *** 14.30%

December 21 26.5 9.637 19 31.4 15.123 39.903 0.000 *** 131853.000 4.4844E-17 *** 18.49%

10L - Lower January 20 27.5 14.381 19 35.5 18.681 22.672 0.000 *** 114751.000 5.1345E-29 *** 29.09% 10LA002 36.9% 42.76 Mackenzie February 20 20.6 12.899 19 29.7 15.123 6.753 0.009 ** 91116.500 1.8098E-30 *** 44.17%

April 20 15.75 10.749 20 26.65 14.752 41.667 0.000 *** 95229.500 2.7491E-45 *** 69.21%

June 20 440 145.295 20 402.5 128.986 8.385 0.004 ** 200171.000 6.0059E-07 *** 8.52%

July 20 303 84.508 20 293 59.304 30.910 0.000 *** 201856.500 0.0018 ** 3.30%

September 20 155 44.478 20 180 47.443 13.559 0.000 ** 133917.000 1.6229E-14 *** 16.13%

November 20 38.9 17.791 19 54.05 26.390 24.109 0.000 *** 117985.000 4.4373E-20 *** 38.95%

June 23 535 256.4898 15 401 197.1858 9.2340 0.0024 ** 183970.0 0.0000 *** 25.0%

July 22 235 87.4734 15 268 127.5036 31.8499 0.0000 *** 122519.0 0.0000 *** 14.0%

August 23 243 113.4189 15 270 124.5384 0.1682 0.6818 143799.5 0.0028 ** 11.1%

September 23 219 75.6126 15 269 93.4038 16.3935 0.0001 *** 107623.0 0.0000 *** 22.8%

October 23 92.5 40.6232 14 104 60.7866 33.5657 0.0000 *** 136668.0 0.0601 12.4%

November 23 47.9 13.6399 13 52.5 12.8986 0.5392 0.4628 106190.5 0.0000 *** 9.6% 10MA001 26.3% 50.05 December 23 32 8.8956 13 36.8 8.8956 0.0002 0.9882 86905.0 0.0000 *** 15.0%

January 22 23 5.2632 14 28.6 4.5961 0.2520 0.6157 61853.5 0.0000 *** 24.3%

February 22 19.9 3.8548 14 25.9 4.4478 8.5197 0.0035 ** 44539.5 0.0000 *** 30.2%

March 22 18.7 2.5204 15 24.7 3.7065 55.7966 0.0000 *** 63608.0 0.0000 *** 32.1%

April 22 19.7 4.0030 15 24.4 6.5234 64.3709 0.0000 *** 81151.0 0.0000 *** 23.9%

10M - Peel May 20 202 261.6789 15 420 455.1582 1.5748 0.2095 114336.5 0.0000 *** 107.9% 32.2% River September 21 753 286.1418 22 868.5 309.1221 1.5897 0.2074 172780.5 0.0001 *** 15.3%

October 21 328 152.7078 22 402.5 166.7925 7.8736 0.0050 ** 170848.0 0.0000 *** 22.7%

November 21 148 42.9954 21 178 68.1996 97.1703 0.0000 *** 127915.5 0.0000 *** 20.3%

December 21 103 25.2042 21 126 25.2042 35.8610 0.0000 *** 80983.5 0.0000 *** 22.3%

January 20 81.15 12.8245 21 109 24.3146 92.4739 0.0000 *** 58925.5 0.0000 *** 34.3%

February 20 73.6 11.2678 21 97.5 22.5355 126.1856 0.0000 *** 43903.5 0.0000 *** 32.5% 10MC002 33.8% 181.25 March 20 70 12.4538 22 88.8 17.0499 50.1085 0.0000 *** 58287.0 0.0000 *** 26.9%

April 20 70.45 14.3071 22 91.9 22.2390 68.8131 0.0000 *** 66761.5 0.0000 *** 30.4%

June 19 2220 1008.1680 22 1700 785.7780 15.2840 0.0001 *** 220162.5 0.0000 *** 23.4% July 19 1060 475.9146 22 1020 414.3867 3.8314 0.0503 205729.0 0.3363 3.8% August 20 947 412.1628 22 999.5 453.6756 3.7306 0.0534 207470.5 0.3639 5.5%

May 17 552 708.6828 22 1530 1994.8383 2.9521 0.0858 149528.0 0.0002 *** 177.2%

WWF-Canada Watershed Report for the Lower Mackenzie Watershed. 34 Disclaimer: This analysis reflects currently accessible and available data that aligns with our nationally consistent suite of indicators, as of June 2015.

FIGURE. PERCENTAGE CHANGE IN MEDIAN MONTHLY FLOW FOR RECENT VS. HISTORICAL PERIODS IN LOWER MACKENZIE BASIN, BY SITE.

WWF-Canada Watershed Report for the Lower Mackenzie Watershed. 35 Disclaimer: This analysis reflects currently accessible and available data that aligns with our nationally consistent suite of indicators, as of June 2015.

WWF-Canada Watershed Report for the Lower Mackenzie Watershed. 36 Disclaimer: This analysis reflects currently accessible and available data that aligns with our nationally consistent suite of indicators, as of June 2015.

WWF-Canada Watershed Report for the Lower Mackenzie Watershed. 37 Disclaimer: This analysis reflects currently accessible and available data that aligns with our nationally consistent suite of indicators, as of June 2015.

WWF-Canada Watershed Report for the Lower Mackenzie Watershed. 38 Disclaimer: This analysis reflects currently accessible and available data that aligns with our nationally consistent suite of indicators, as of June 2015.

FIGURE. MONTHLY FLOW FOR RECENT VS. HISTORICAL TIME PERIODS IN THE LOWER MACKENZIE BASIN, BY SITE.

WWF-Canada Watershed Report for the Lower Mackenzie Watershed. 39 Disclaimer: This analysis reflects currently accessible and available data that aligns with our nationally consistent suite of indicators, as of June 2015.

WWF-Canada Watershed Report for the Lower Mackenzie Watershed. 40 Disclaimer: This analysis reflects currently accessible and available data that aligns with our nationally consistent suite of indicators, as of June 2015.

WWF-Canada Watershed Report for the Lower Mackenzie Watershed. 41 Disclaimer: This analysis reflects currently accessible and available data that aligns with our nationally consistent suite of indicators, as of June 2015.

WWF-Canada Watershed Report for the Lower Mackenzie Watershed. 42 Disclaimer: This analysis reflects currently accessible and available data that aligns with our nationally consistent suite of indicators, as of June 2015.

WATER QUALITY

OVERALL WATER QUALITY HEALTH SCORING

07Q - 07P - Great 07U - 10G - 10H - 10K - 07S - 10D - 10F - Southern Slave Western 10A - 10B - 10E - Upper Central 10J - Central 10L - 07N - 07O - 07R - Northeastern 07T - 10C - Fort Central Upper 10M - Basin Indicator Great Lake- Great Upper Central Lower Mackenzie- Mackenzie- Great Mackenzie- Lower Slave Hay Lockhart Great Slave Marian Nelson Liard- Mackenzie- Peel Slave East Arm Slave Liard Liard Liard Camsell Blackwater Bear The Mackenzie Lake Petitot Mills Lake Lake South Lake Band Lake Ramparts Shore 2011- 2009- 2009- 2009- 2009- 2009- Year - - - 2013 - 2012 2009-2013 2011 - 2009-2013 2013 2006-2007 2009-2013 2009-2013 Various Exceedance of water 2013 2013 2013 2013 2013 2013 quality thresholds. Number Weighted average of of 7 4 0 0 0 2 0 27 41 2 0 3 9 13 1 13 2 39 30 5 198 exceedances of three Stations thresholds: water Data Data Data Data Data Data Data Data Value 0.20 0.20 0.12 0.12 0.24 0.16 0.14 0.19 0.12 0.31 0.21 0.3 0.16 quality guidelines,90th Deficient Deficient Deficient Deficient Deficient Deficient Deficient Deficient percentile and 77th Water Water percentile. Expressed Quality Data Data Data Data Data Data Data Data Data Quality Fair Fair Good Good Fair Fair Fair Good Poor Fair Poor Fair Exceedance as a proportion of Health Deficient Deficient Deficient Deficient Deficient Deficient Deficient Deficient Deficient of water total measurements. Category quality Reported as a Water guidelines weighted average for Quality 3 3 0 0 0 4 0 0 4 0 0 3 3 3 0 0 4 2 3 2 3 for aquatic the last five years. Health life Score Variance of annual Value NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA water quality score Significant Mann- Time 1960- 1987- Data Data Data Data Data Data Data 1960- 1960- Data Data 1969- 1960- - 1991-2013 1960-2013 1960-2013 1960-2013 Various Kendal time-series test Period 2010 2007 Deficient Deficient Deficient Deficient Deficient Deficient Deficient 2013 2013 Deficient Deficient 2013 2013 to determine Negative directional trend in Trend in Data Data Data Data Data Data Data Data Data proportion of Trend None None - Proportion None None None None None None None None Deficient Deficient Deficient Deficient Deficient Deficient Deficient Deficient Deficient exceedance of water of quality thresholds. Exceedence

WWF-Canada Watershed Report for the Lower Mackenzie Watershed. 43 Disclaimer: This analysis reflects currently accessible and available data that aligns with our nationally consistent suite of indicators, as of June 2015.

WATER QUALITY DATA SUFFICIENCY

07Q - 10G - 10H - 10K - 07P - Great 07S - 07U - 10D - 10A - 10B - 10E - 10F - Upper Upper Central Central 10L - Data Sufficiency 07N - Southern Slave Lake- 07R - Northeastern 07T - Western 10C - Fort Central 10J - Great Basin 07O - Hay Upper Central Lower Mackenzie- Mackenzie- Mackenzie- Mackenzie- Lower 10M - Peel Indicator Slave Great East Arm Lockhart Great Slave Marian Great Nelson Liard- Bear Liard Liard Liard Mills Lake Camsell Blackwater The Mackenzie Slave Lake South Lake Slave Lake Petitot Band Lake Ramparts Shore Total number of sub- 3 3 3 5 3 3 2 3 4 5 6 2 4 3 4 3 5 4 4 3 72 sub-basins Year of earliest 1976 1968 - 1969 - 1967 - 2012 1991 2011 - 1960 1960 1960 2006 1969 1969 1960 1960 1960 1960 available monitoring Number of monitoring stations available for 1 1 0 1 0 1 0 1 1 2 0 1 9 1 2 1 1 1 1 1 26 earliest monitoring Number of sub-sub- basins with earliest 1 1 0 1 0 1 0 1 1 1 0 1 3 1 2 1 1 1 1 1 19 available monitoring stations Year of most recently 2013 2013 - 2013 - 2013 - 2012 2013 2011 - 2013 2013 2013 2013 2007 2013 2013 2013 2013 2013 available monitoring Number of monitoring

Water Quality Water stations available 7 4 0 1 0 2 0 27 41 2 0 4 10 13 1 0 2 39 30 5 188 within last five years Number of sub-sub- basins within last five 2 1 0 1 0 2 0 1 3 1 0 2 4 2 1 0 2 2 3 1 28 years Percentage of samples with at least 10 42% 92% 0% 100% 0% 100% 0% 0% 60.0% 0.0% 0.0% 90.0% 100.0% 89% 50% 0% 83% 42% 43% 44.00% 47% elements measured within last 5 years. Number of years of sampling in last 10 4 10 0 10 0 2 0 1 10 1 0 10 10 10 3 2 10 10 10 10 10 years Overall Data Sufficiency Partially Partially Partially Partially Partially Partially Partially Partially Partially Partially Insufficient Insufficient Insufficient Insufficient Insufficient Insufficient Insufficient Sufficient Sufficient Insufficient Insufficient Category Sufficient Sufficient Sufficient Sufficient Sufficient Sufficient Sufficient Sufficient Sufficient Sufficient Data Sufficiency Score 1 1 0 0 0 1 0 0 1 0 0 3 3 1 0 0 1 1 1 1 1

WWF-Canada Watershed Report for the Lower Mackenzie Watershed. 44 Disclaimer: This analysis reflects currently accessible and available data that aligns with our nationally consistent suite of indicators, as of June 2015.

MAP. EXCEEDANCE OF WATER QUALITY THRESHOLDS AS REPORTED FOR MONITORING STATIONS IN THE LOWER MACKENZIE BASIN FOR THE FIVE MOST RECENT YEARS AVAILABLE.

WWF-Canada Watershed Report for the Lower Mackenzie Watershed. 45 Disclaimer: This analysis reflects currently accessible and available data that aligns with our nationally consistent suite of indicators, as of June 2015.

TABLE. WATER QUALITY IN THE LOWER MACKENZIE BASIN BASED ON PROPORTION OF EXCEEDANCE OF THREE THRESHOLDS: PROVINCIAL WATER QUALITY GUIDELINES, 75TH PERCENTILE OF HISTORICAL DISTRIBUTION, AND 90TH PERCENTILE OF HISTORICAL DISTRIBUTION. REPORTED BY SUB-BASIN AND DATA SOURCE. Total Total Total Proportion Proportion Proportion 5-Years Number of Total Number of Number of Weighted Number of Number of of of 90th of 75th Weighted Sub-basin Year Data Source Contaminants Number 90th 75th Average Measurements Guidelines Guideline Percentile Percentile Average Measured of Sites Percentile Percentile Exceedance Exceedances Exceedance Exceedance Exceedance Exceedance Exceedances Exceedances NWT-Wide Community- based Water 2013 16 7 451 93 0.21 62 0.14 137 0.30 0.20 Quality Monitoring Program 2012 EC 17 4 443 90 0.20 38 0.09 159 0.36 0.19 07N - Slave 0.20 NWT-Wide Community- based Water 2012 16 1 62 23 0.37 8 0.13 19 0.31 0.28 Quality Monitoring Program 2011 EC 17 1 181 27 0.15 26 0.14 51 0.28 0.17

2013 EC 16 1 37 8 0.22 3 0.08 10 0.27 0.18 NWT-Wide Community- based Water 2013 16 4 248 42 0.17 12 0.05 111 0.45 0.18 Quality Monitoring Program 2012 EC 16 1 84 17 0.20 8 0.10 20 0.24 0.17 07O - Hay NWT-Wide 0.20 Community- based Water 2012 16 1 32 7 0.22 1 0.03 3 0.09 0.14 Quality Monitoring Program 2011 EC 16 1 100 26 0.26 5 0.05 15 0.15 0.17 2010 EC 17 2 278 42 0.15 14 0.05 33 0.12 0.11 2009 EC 17 2 269 92 0.34 97 0.36 131 0.49 0.37

NWT-Wide 07S - Community- Northeastern based Water 2013 16 2 128 24 0.19 4 0.03 11 0.09 0.12 0.12 Great Slave Quality Lake Monitoring Program

NWT-Wide Community- 07U - based Water Western 2013 16 3 147 8 0.05 106 0.72 117 0.80 0.40 Quality 0.20 Great Slave Monitoring Lake Program 2012 CABIN 2 27 54 0 0.00 0 0.00 9 0.17 0.03

2013 EC 14 1 41 2 0.0488 11 0.2683 18 0.4390 0.1870 2012 EC 14 1 93 2 0.0215 9 0.0968 26 0.2796 0.0896 2011 CABIN 2 20 40 0 0.0000 0 0.0000 4 0.1000 0.0167 10A - Upper 2011 EC 11 1 163 11 0.0675 22 0.1350 44 0.2699 0.1237 0.12 Liard 2010 CABIN 5 20 100 1 0.0100 31 0.3100 37 0.3700 0.1700 2010 EC 13 1 211 6 0.0284 21 0.0995 53 0.2512 0.0893 2009 EC 13 1 208 13 0.0625 32 0.1538 52 0.2500 0.1242 BC 10B - Central Environmental 2011 3 2 9 0 0.0000 4 0.4444 5 0.5556 0.2407 0.24 Liard Monitoring System BC Environmental 2013 6 1 57 0 0.0000 2 0.0351 6 0.1053 0.0292 Monitoring System 2013 EC 16 1 104 13 0.1250 10 0.0962 27 0.2596 0.1378 2012 EC 17 1 97 23 0.2371 15 0.1546 35 0.3608 0.2302 10D - Central 2011 EC 17 1 137 9 0.0657 0 0.0000 21 0.1533 0.0584 0.16 Liard-Petitot BC Environmental 2010 3 2 9 0 0.0000 0 0.0000 1 0.1111 0.0185 Monitoring System 2010 EC 17 1 167 31 0.1856 6 0.0359 36 0.2156 0.1407 2009 EC 17 1 125 50 0.4000 19 0.1520 70 0.5600 0.3440

WWF-Canada Watershed Report for the Lower Mackenzie Watershed. 46 Disclaimer: This analysis reflects currently accessible and available data that aligns with our nationally consistent suite of indicators, as of June 2015.

2013 EC 18 9 454 71 0.1564 49 0.1079 133 0.2930 0.1630 NWT-Wide Community- based 2013 Water 16 1 45 19 0.42 10 0.22 25 0.56 0.38 10E - Quality Lower Monitoring 0.14 Liard Program 2012 EC 18 9 632 89 0.1408 55 0.0870 194 0.3070 0.1506 2011 EC 18 9 591 86 0.1455 24 0.0406 165 0.2792 0.1328 2010 EC 18 9 620 70 0.1129 80 0.1290 168 0.2710 0.1446 2009 EC 18 9 569 79 0.1388 35 0.0615 145 0.2548 0.1324

2013 EC 11 1 112 27 0.24 1 0.01 15 0.13 0.15 NWT-Wide Community- based 2013 Water 16 6 386 75 0.19 9 0.02 48 0.12 0.13 Quality Monitoring Program 10F - 2012 EC 11 1 54 13 0.24 2 0.04 12 0.22 0.17 Upper NWT-Wide 0.13 Mackenzie- Community- Mills Lake based 2012 Water 16 5 288 60 0.21 6 0.02 37 0.13 0.13 Quality Monitoring Program 2011 EC 12 2 77 12 0.16 4 0.05 11 0.14 0.12 2010 EC 14 2 146 38 0.26 6 0.04 21 0.14 0.17 2009 EC 15 2 261 44 0.17 3 0.01 46 0.18 0.12 NWT-Wide 10G - Community- Upper based Mackenzie- 2013 Water 16 1 33 14 0.42 9 0.27 18 0.55 0.39 0.39 Camsell Quality Band Monitoring Program 2013 EC 15 1 87 14 0.16 8 0.09 23 0.26 0.16 NWT-Wide Community- based 2013 Water 16 1 48 5 0.10 2 0.04 5 0.10 0.08 Quality 10J - Great Monitoring 0.12 Bear Program 2012 EC 15 1 45 7 0.16 4 0.09 7 0.16 0.13 2011 EC 15 1 111 17 0.15 4 0.04 13 0.12 0.11 2010 EC 15 1 159 12 0.08 16 0.10 21 0.13 0.09 2009 EC 15 1 39 7 0.18 3 0.08 8 0.21 0.15

2013 EC 9 1 38 9 0.24 3 0.08 15 0.39 0.21 NWT-Wide Community- based 2013 Water 16 13 716 331 0.46 198 0.28 385 0.54 0.41 10K - Quality Central Monitoring Mackenzie- Program 0.31 The 2012 EC 9 1 75 20 0.27 4 0.05 20 0.27 0.20 Ramparts 2011 EC 9 1 114 33 0.29 1 0.01 34 0.30 0.20 2010 EC 14 2 84 13 0.15 6 0.07 20 0.24 0.14 2009 CABIN 3 24 72 3 0.04 20 0.28 25 0.35 0.17 2009 EC 14 2 157 32 0.20 10 0.06 43 0.27 0.17

WWF-Canada Watershed Report for the Lower Mackenzie Watershed. 47 Disclaimer: This analysis reflects currently accessible and available data that aligns with our nationally consistent suite of indicators, as of June 2015.

Arctic Great 2013 Lakes 1 1 4 0 0.00 0 0.00 0 0.00 0.00 Observatory 2013 EC 10 1 67 26 0.39 1 0.01 28 0.42 0.27 NWT-Wide Community- based 2013 Water 16 5 274 95 0.35 33 0.12 95 0.35 0.27 Quality Monitoring Program Arctic Great 2012 Lakes 1 2 5 0 0.00 1 0.20 2 0.40 0.13 Observatory 2012 EC 10 1 30 11 0.37 7 0.23 18 0.60 0.36 NWT-Wide Community- 10L - based 2012 Water 16 2 79 22 0.28 5 0.06 18 0.23 0.20 Lower 0.21 Mackenzie Quality Monitoring Program Arctic Great 2011 Lakes 1 1 3 0 0.00 0 0.00 1 0.33 0.06 Observatory 2011 EC 10 1 78 28 0.36 11 0.14 44 0.56 0.32 Arctic Great 2010 Lakes 5 1 22 0 0.00 1 0.05 3 0.14 0.04 Observatory 2010 CABIN 4 3 10 0 0.00 0 0.00 2 0.20 0.03 2010 EC 14 2 36 11 0.31 4 0.11 14 0.39 0.25 Arctic Great 2009 Lakes 5 1 20 0 0.00 1 0.05 2 0.10 0.03 Observatory 2009 CABIN 3 20 60 13 0.22 0 0.00 16 0.27 0.15 2009 EC 14 2 111 23 0.21 14 0.13 34 0.31 0.20 2013 EC 9 1 32 10 0.31 4 0.13 6 0.19 0.23 NWT-Wide Community- based 2013 Water 16 4 192 74 0.39 30 0.16 52 0.27 0.29 Quality Monitoring Program 2012 EC 9 1 63 25 0.40 18 0.29 35 0.56 0.39 NWT-Wide 0.30 Community- 10M - based Peel River 2012 Water 16 1 47 22 0.47 10 0.21 18 0.38 0.37 Quality Monitoring Program 2011 EC 9 1 90 44 0.49 14 0.16 23 0.26 0.34 2010 EC 9 1 61 16 0.26 13 0.21 18 0.30 0.25 2009 EC 9 1 36 13 0.36 5 0.14 10 0.28 0.27 2008 CABIN 2 25 50 1 0.02 3 0.06 5 0.10 0.05 2007 CABIN 2 23 46 0 0.00 9 0.20 23 0.50 0.17 1999 AANDC 15 14 196 18 0.09 59 0.30 96 0.50 0.23

WWF-Canada Watershed Report for the Lower Mackenzie Watershed. 48 Disclaimer: This analysis reflects currently accessible and available data that aligns with our nationally consistent suite of indicators, as of June 2015.

FIGURE. ANALYSIS OF VARIANCE IN EXCEEDANCE OF WATER QUALITY THRESHOLDS OVER TIME FOR MONITORING STATIONS IN THE LOWER MACKENZIE BASIN (1960-2013).

WWF-Canada Watershed Report for the Lower Mackenzie Watershed. 49 Disclaimer: This analysis reflects currently accessible and available data that aligns with our nationally consistent suite of indicators, as of June 2015.

FIGURE. ANALYSIS OF VARIANCE IN EXCEEDANCE OF WATER QUALITY THRESHOLDS OVER TIME FOR MONITORING STATIONS IN THE LOWER MACKENZIE BASIN, BY CONTAMINANT (ALBERTA).

WWF-Canada Watershed Report for the Lower Mackenzie Watershed. 50 Disclaimer: This analysis reflects currently accessible and available data that aligns with our nationally consistent suite of indicators, as of June 2015.

WWF-Canada Watershed Report for the Lower Mackenzie Watershed. 51 Disclaimer: This analysis reflects currently accessible and available data that aligns with our nationally consistent suite of indicators, as of June 2015.

FIGURE. ANALYSIS OF VARIANCE IN EXCEEDANCE OF WATER QUALITY THRESHOLDS OVER TIME FOR MONITORING STATIONS IN THE LOWER MACKENZIE BASIN, BY CONTAMINANT (BRITISH-COLUMBIA).

WWF-Canada Watershed Report for the Lower Mackenzie Watershed. 52 Disclaimer: This analysis reflects currently accessible and available data that aligns with our nationally consistent suite of indicators, as of June 2015.

WWF-Canada Watershed Report for the Lower Mackenzie Watershed. 53 Disclaimer: This analysis reflects currently accessible and available data that aligns with our nationally consistent suite of indicators, as of June 2015.

WWF-Canada Watershed Report for the Lower Mackenzie Watershed. 54 Disclaimer: This analysis reflects currently accessible and available data that aligns with our nationally consistent suite of indicators, as of June 2015.

FIGURE. ANALYSIS OF VARIANCE IN EXCEEDANCE OF WATER QUALITY THRESHOLDS OVER TIME FOR MONITORING STATIONS IN THE LOWER MACKENZIE BASIN, BY CONTAMINANT (YUKON TERRITORY).

WWF-Canada Watershed Report for the Lower Mackenzie Watershed. 55 Disclaimer: This analysis reflects currently accessible and available data that aligns with our nationally consistent suite of indicators, as of June 2015.

WWF-Canada Watershed Report for the Lower Mackenzie Watershed. 56 Disclaimer: This analysis reflects currently accessible and available data that aligns with our nationally consistent suite of indicators, as of June 2015.

FIGURE. ANALYSIS OF VARIANCE IN EXCEEDANCE OF WATER QUALITY THRESHOLDS OVER TIME FOR MONITORING STATIONS IN THE LOWER MACKENZIE BASIN, BY CONTAMINANT (NORTHWEST TERRITORIES).

WWF-Canada Watershed Report for the Lower Mackenzie Watershed. 57 Disclaimer: This analysis reflects currently accessible and available data that aligns with our nationally consistent suite of indicators, as of June 2015.

WWF-Canada Watershed Report for the Lower Mackenzie Watershed. 58 Disclaimer: This analysis reflects currently accessible and available data that aligns with our nationally consistent suite of indicators, as of June 2015.

WWF-Canada Watershed Report for the Lower Mackenzie Watershed. 59 Disclaimer: This analysis reflects currently accessible and available data that aligns with our nationally consistent suite of indicators, as of June 2015.

WWF-Canada Watershed Report for the Lower Mackenzie Watershed. 60 Disclaimer: This analysis reflects currently accessible and available data that aligns with our nationally consistent suite of indicators, as of June 2015.

TABLE . RESULTS OF MANN-KENDALL NON-PARAMETRIC TREND ANALYSIS OF ANNUAL EXCEEDANCE OF WATER QUALITY THRESHOLDS OVER TIME IN THE LOWER MACKENZIE BASIN.

Number of Number of Theil-Sen Mann-Ken Sub-basin Data Source Start Year End Year Mann-Ken p-value Years Sites Slope Score

All 1976 2012 18 11 -0.0015 -120 0.1190

AB Env. and 07N - Slave Sustainable 1976 1996 17 10 -0.0016 -26 0.4495 Res. Dev.

EC 2012 2012 1 1

All 1960 2012 51 3 -0.0016 -250 0.0558 Alberta EC 1960 2012 51 1 -0.0016 -263 0.0442 *

07O - Hay AB Env. and Sustainable 2005 2005 1 1 Res. Dev.

ABI 2007 2007 1 1

10D - Central CABIN (DFO) 2006 2006 1 18 Liard-Petitiot 10A - Upper BC-EMS 2004 2008 2 2 Liard British- 10B - Central BC-EMS 2011 2011 1 2 Columbia Liard 10D - Central BC-EMS 2010 2013 2 3 Liard-Petitiot Yukon 10D - Central CABIN (DFO) 2006 2006 1 2 Territory Liard-Petitiot

WWF-Canada Watershed Report for the Lower Mackenzie Watershed. 61 Disclaimer: This analysis reflects currently accessible and available data that aligns with our nationally consistent suite of indicators, as of June 2015.

All 2012 2013 2 9 - - - EC 2012 2012 1 2 - - - NWT-Wide 07N - Slave Community- based Water 2012 2013 2 7 - - - Quality Monitoring Program All 1968 2013 41 7 0.0000 -25 0.8200 EC 1968 2013 41 2 0.0002 29 0.7907 NWT-Wide 07O - Hay Community- based Water 2012 2013 2 5 - - - Quality Monitoring Program All 1967 2013 23 3 0 -72 0.4991 EC 1967 2001 22 1 0 -60 0.3765 07S - NWT-Wide Northeastern Community- Great Slave based Water Lake 2013 2013 1 2 - - - Quality Monitoring Program All 2012 2013 2 30 - - - CABIN 2012 2012 1 27 - - - 07U - NWT-Wide Western Community- Great Slave based Water Lake 2013 2013 1 3 - - - Quality Monitoring Program - All 1960 2013 49 11 -300 0.0252401 10A - Upper 0.0012533 Liard - EC 1960 2013 49 10 -291 0.029975568 0.0012698

10D - Central All 1960 2013 26 1 0.0002646 113 0.401691363 Liard-Petitiot EC 1960 2013 26 1 0.0002646 113 0.401691363 - All 1960 2013 46 10 -201 0.135053678 0.0009171 10E - Lower CABIN (DFO) 2006 2006 1 1 Northwest Liard - Territories EC 1960 2013 46 9 -195 0.147160971 0.0009191 All 1960 2013 46 14 -0.0014 -176 0.1905 10F - Upper Mackenzie- CABIN (DFO) 2006 2007 2 11 - - - Mills Lake ec 1960 2013 46 3 -0.0013 -172 0.2008 10G - Upper All 2006 2007 2 10 - - - Mackenzie- Camsell CABIN (DFO) 2006 2007 2 10 - - - Band 10H - Central All 1969 2007 9 14 0.0000 -43 0.6087 Mackenzie- CABIN (DFO) 2006 2007 2 13 - - - Blackwater Lake EC 1969 1994 7 1 0.0000 -21 0.6553 All 1969 2013 43 3 0.0000 212 0.0290 * 10J - Great CABIN (DFO) 2006 2006 1 1 - - - Bear EC 1969 2013 43 2 0.0000 212 0.0290 * All 1960 2013 51 43 -0.0011 -119 0.3779 10K - Central CABIN (DFO) 2005 2006 2 17 - - - Mackenzie- CABIN (NWT- 2009 2010 2 24 - - - The Delta) Ramparts Environment 1960 2013 51 2 -0.0005 -74 0.5854 Canada All 1960 2013 52 56 -0.0013 -185 0.1692 Arctic Great Rivers 2003 2013 10 2 -0.0069 -21 0.1006 Observatory 10L - Lower Mackenzie CABIN (DFO) 2005 2007 3 33 - - - CABIN (NWT- 2009 2010 2 19 - - - Delta) Environment 1960 2013 52 2 0.0005 78 0.5651 Canada EC 1960 2013 41 1 0 45 0.74 NWT-Wide Community- based Water 2012 2013 2 4 - - - 10M - Peel Quality River Monitoring Program AANDC 1999 1999 1 14 - - - CABIN 2007 2008 2 48 - - -

WWF-Canada Watershed Report for the Lower Mackenzie Watershed. 62 Disclaimer: This analysis reflects currently accessible and available data that aligns with our nationally consistent suite of indicators, as of June 2015.

FISH

OVERALL FISH HEALTH SCORING

07Q - 07P - Great 07U - 10G - 10H - 10K - 07S - 10D - Southern Slave Western 10A - 10B - 10E - 10F - Upper Upper Central 10J - Central 10L - 07N - 07O - 07R - Northeastern 07T - 10C - Fort Central 10M - Basin Indicator Great Lake- Great Upper Central Lower Mackenzie- Mackenzie- Mackenzie- Great Mackenzie- Lower Slave Hay Lockhart Great Slave Marian Nelson Liard- Peel Slave East Arm Slave Liard Liard Liard Mills Lake Camsell Blackwater Bear The Mackenzie Lake Petitot Lake South Lake Band Lake Ramparts Shore Period of 1961- 1969- 1973- 1979- 1974- 1980- 1982- 1983- 1998------1994-2003 1971-2003 2002-2007 1962 2002-2007 2002-2003 Various Study 2000 2012 2011 2012 2007 2011 2009 2009 2010

Number 24 102 9 0 0 0 0 0 103 276 408 16 107 10 13 19 1 21 21 41 1171 of Sites Presence of statistically significant Data Data Data Data Data Data Data Data Data Data Fish decline in number of Trend No No No No No No No No No No No Deficient Deficient Deficient Deficient Deficient Deficient Deficient Deficient Deficient Deficient total species observed Change per year. in Native Presence of Fish statistically significant Species Data Data Data Data Data Data Data Data Data Data decline in median Trend No No No No No No No No No No No Richness Deficient Deficient Deficient Deficient Deficient Deficient Deficient Deficient Deficient Deficient species richness for the basin. Fish Data Data Data Data Data Data Data Data Data Data Data Data Data Data Data Data Health Good Good Good Good Good Deficient Deficient Deficient Deficient Deficient Deficient Deficient Deficient Deficient Deficient Deficient Deficient Deficient Deficient Deficient Deficient Category

Fish Health 0 4 4 0 0 0 0 0 4 0 4 4 0 0 0 0 0 0 0 0 0 Score

WWF-Canada Watershed Report for the Lower Mackenzie Watershed. 63 Disclaimer: This analysis reflects currently accessible and available data that aligns with our nationally consistent suite of indicators, as of June 2015.

FISH DATA SUFFICIENCY

07Q - 10G - 10H - 10K - 07P - Great 07S - 07U - 10D - 10F - 10A - 10B - 10E - Upper Central Central 10L - Data Sufficiency 07N - Southern Slave 07R - Northeastern 07T - Western 10C - Fort Central Upper 10J - Great Basin 07O - Hay Upper Central Lower Mackenzie- Mackenzie- Mackenzie- Lower 10M - Peel Indicator Slave Great Lake- East Lockhart Great Slave Marian Great Nelson Liard- Mackenzie- Bear Liard Liard Liard Camsell Blackwater The Mackenzie Slave Lake Arm South Lake Slave Lake Petitot Mills Lake Band Lake Ramparts Shore Total number of sub-sub- 3 3 3 5 3 3 2 3 4 5 6 2 4 3 4 3 5 4 4 3 72 basins Year of earliest available 1961 1969 1973 - - - - - 1979 1974 1980 1982 - 1994 1971 2002 1962 2002 2002 1998 1961 monitoring Number of sampling locations available for 2 1 1 0 0 0 0 0 3 2 9 2 0 2 1 7 1 8 7 3 49 earliest monitoring Number of sub-sub- basins with earliest 1 1 1 0 0 0 0 0 2 1 2 1 0 2 1 1 1 2 2 3 21 available sampling locations Earliest year of 1996 1994 2010 - - - - - 2008 2006 2011 2006 - 2002 2002 2002 - 2002 2002 1998 1994 continuous monitoring

Number of sampling

Fish locations available for 7 1 1 0 0 0 0 0 3 1 35 2 0 2 5 7 0 8 7 3 82 first year of continuous monitoring Number of sub-sub- basins for first year of 2 1 1 0 0 0 0 0 2 1 2 1 0 1 2 1 0 2 2 1 19 continuous monitoring Year of most recently 2000 2012 2011 - - - - - 2012 2007 2012 2009 - 2003 2003 2007 1962 2007 2003 2010 2012 available monitoring Number of monitoring stations available within 0 46 2 0 0 0 0 0 5 0 26 18 0 0 0 0 0 0 0 51 148 last five years Number of sub-sub- basins within last five 0 3 1 0 0 0 0 0 1 0 3 1 0 0 0 0 0 0 0 3 12 years Number of years of 0 10 2 0 0 0 0 0 5 3 10 3 0 1 1 5 0 0 0 3 10 sampling in last 10 years Overall Data Sufficiency Partially Partially Partially Partially Insufficient Sufficient Insufficient Insufficient Insufficient Insufficient Insufficient Insufficient Insufficient Insufficient Insufficient Insufficient Insufficient Insufficient Insufficient Insufficient Insufficient Category Sufficient Sufficient Sufficient Sufficient Data Sufficiency Score 0 3 1 0 0 0 0 0 1 0 1 1 0 0 0 0 0 0 0 0 0

WWF-Canada Watershed Report for the Lower Mackenzie Watershed. 64 Disclaimer: This analysis reflects currently accessible and available data that aligns with our nationally consistent suite of indicators, as of June 2015.

MAP. NUMBER OF FISH SPECIES OBSERVED IN THE LOWER MACKENZIE BASIN.

WWF-Canada Watershed Report for the Lower Mackenzie Watershed. 65 Disclaimer: This analysis reflects currently accessible and available data that aligns with our nationally consistent suite of indicators, as of June 2015.

FIGURE.NON-PARAMETRIC ANALYSIS OF VARIANCE IN FISH SPECIES RICHNESS WITHIN THE LOWER MACKENZIE

FIGURE.TIME-SERIES OF TOTAL (LEFT) AND MEDIAN (RIGHT) NATIVE FISH SPECIES RICHNESS IN THE SLAVE SUB-WATERSHED (07N).

FIGURE.TIME-SERIES OF TOTAL (LEFT) AND MEDIAN (RIGHT) NATIVE FISH SPECIES RICHNESS IN THE HAY SUB-WATERSHED (07O)

WWF-Canada Watershed Report for the Lower Mackenzie Watershed. 66 Disclaimer: This analysis reflects currently accessible and available data that aligns with our nationally consistent suite of indicators, as of June 2015.

FIGURE.TIME-SERIES OF TOTAL (LEFT) AND MEDIAN (RIGHT) NATIVE FISH SPECIES RICHNESS IN THE SOUTHERN GREAT SLAVE LAKE SUB-WATERSHED (07P).

FIGURE.TIME-SERIES OF TOTAL (LEFT) AND MEDIAN (RIGHT) NATIVE FISH SPECIES RICHNESS IN THE UPPER MACKENZIE – MILLS LAKE SUBWATERSHED (10F).

FIGURE.TIME-SERIES OF TOTAL (LEFT) AND MEDIAN (RIGHT) NATIVE FISH SPECIES RICHNESS IN THE UPPER MACKENZIE – CAMSELL BASIN SUB-WATERSHED (10G).

FIGURE.TIME-SERIES OF TOTAL (LEFT) AND MEDIAN (RIGHT) NATIVE FISH SPECIES RICHNESS IN THE CENTRAL MACKENZIE - BLACKWATER LAKE SUB- WATERSHED (10H).

WWF-Canada Watershed Report for the Lower Mackenzie Watershed. 67 Disclaimer: This analysis reflects currently accessible and available data that aligns with our nationally consistent suite of indicators, as of June 2015.

FIGURE.TIME-SERIES OF TOTAL (LEFT) AND MEDIAN (RIGHT) NATIVE FISH SPECIES RICHNESS IN THE CENTRAL MACKENZIE – THE RAMPARTS SUB-WATERSHED (10K).

TABLE . RESULTS OF MANN-KENDALL NON-PARAMETRIC TREND ANALYSIS OF FISH SPECIES RICHNESS OVER TIME IN THE LOWER MACKENZIE BASIN.

Mann-Kendall Sub-basins Data Source Start Year Number of Sites Theil-Sen Slope Mann-Ken p-value Statistics Score All 1995 135 0 -32 0.2183 Alberta Fisheries and Wildlife 1961 113 0 -51 0.6847 All Management Information System British Columbia Fisheries Information 1995 22 0 -10 0.5898 Survey System

Alberta Fisheries and Wildlife 07N - Slave River 1961 24 0 48 0.5792 Management Information System

Alberta Fisheries and Wildlife 1961 80 0 9 0.9315 Management Information System 07O - Hay British Columbia Fisheries Information 1995 22 0 -10 0.5898 Survey System

07P - Southern Alberta Fisheries and Wildlife 1961 9 0 8 0.9219 Great Slave Lake Management Information System

WWF-Canada Watershed Report for the Lower Mackenzie Watershed. 68 Disclaimer: This analysis reflects currently accessible and available data that aligns with our nationally consistent suite of indicators, as of June 2015.

BENTHICS

OVERALL BENTHIC HEALTH SCORING

WWF-Canada Watershed Report for the Lower Mackenzie Watershed. 69 Disclaimer: This analysis reflects currently accessible and available data that aligns with our nationally consistent suite of indicators, as of June 2015.

BENTHIC DATA SUFFICIENCY

07Q - 10G - 10H - 10K - 07P - Great 07S - 07U - 10D - 10A - 10B - 10E - 10F - Upper Upper Central Central 10L - Data Sufficiency 07N - Southern Slave 07R - Northeastern 07T - Western 10C - Fort Central 10J - Great 10M - Basin 07O - Hay Upper Central Lower Mackenzie- Mackenzie- Mackenzie- Mackenzie- Lower Indicator Slave Great Lake- East Lockhart Great Slave Marian Great Nelson Liard- Bear Peel Liard Liard Liard Mills Lake Camsell Blackwater The Mackenzie Slave Lake Arm South Lake Slave Lake Petitot Band Lake Ramparts Shore Total number of sub- 3 3 3 5 3 3 2 3 4 5 6 2 4 3 4 3 5 4 4 3 72 sub-basins Year of earliest - 2007 - - - - - 2012 2010 - 2011 2006 2006 2006 2006 2006 2006 2005 2005 1998 1998 available monitoring Number of

monitoring stations 0 1 0 0 0 0 0 27 20 0 1 1 1 3 2 9 1 16 8 6 96 available for earliest monitoring Number of sub-sub- basins with earliest

Invertebrates 0 1 0 0 0 0 0 1 1 0 1 1 1 2 2 1 1 3 1 1 17

- available monitoring stations Year of most recently - 2007 - - - - - 2012 2011 - 2013 2013 2006 2007 2007 2007 2006 2009 2012 2008 2013 available monitoring Number of monitoring stations

Benthic Macro Benthic 0 0 0 0 0 0 0 27 40 0 9 9 0 0 0 0 0 23 71 17 203 available within last five years Number of sub-sub- basins within last five 0 0 0 0 0 0 0 1 3 0 2 1 0 0 0 0 0 3 2 1 13 years Number of years of sampling in last 10 0 1 0 0 0 0 0 1 2 0 3 4 1 2 2 2 1 3 6 3 31 years Overall Data Sufficiency Partially Partially Partially Partially Partially Partially Insufficient Insufficient Insufficient Insufficient Insufficient Insufficient Insufficient Insufficient Insufficient Insufficient Insufficient Insufficient Insufficient Insufficient Insufficient Category Sufficient Sufficient Sufficient Sufficient Sufficient Sufficient Data Sufficiency Score 0 0 0 0 0 0 0 0 1 0 1 1 0 0 0 0 0 1 1 1 0

WWF-Canada Watershed Report for the Lower Mackenzie Watershed. 70 Disclaimer: This analysis reflects currently accessible and available data that aligns with our nationally consistent suite of indicators, as of June 2015.

MAP. HILSENHOFF'S BIOTIC INDEX SCORES FOR BENTHIC MACRO-INVERTEBRATE COMMUNITIES IN THE LOWER MACKENZIE BASIN (2009-2013).

WWF-Canada Watershed Report for the Lower Mackenzie Watershed. 71 Disclaimer: This analysis reflects currently accessible and available data that aligns with our nationally consistent suite of indicators, as of June 2015.

FIGURE. ANALYSIS OF VARIANCE FOR HILSENHOFF'S BIOTIC INDEX VALUES FOR BENTHIC MACRO-INVERTEBRATE COMMUNITIES SAMPLED IN THE LOWER MACKENZIE BASIN (2005-2013).

WWF-Canada Watershed Report for the Lower Mackenzie Watershed. 72 Disclaimer: This analysis reflects currently accessible and available data that aligns with our nationally consistent suite of indicators, as of June 2015.

TABLE . HILSENHOFF'S BIOTIC INDEX VALUSES FOR BENTHIC MACRO-INVERTEBRATE COMMUNITIES SAMPLED IN THE LOWER MACKENZIE BASIN, BY SUB- WATERSHED, YEAR AND DATA SOURCE.

5-Year Sub-basin Year Data Source Number of Sites HBI Value Weighted Average

Alberta Biomonitoring 07O - Hay 2007 1 2.6 2.60 Institute 07U - Western 2012 CABIN 27 4.5230 4.52 Great Slave Lake 2011 20 3.89 10A - Upper Liard CABIN-YTG 3.86 2010 20 3.83

2013 4 4.52

10C - Fort Nelson 2012 CABIN-Geoscience 4 4.32 4.34

2011 1 3.70

2013 2 4.05

10D - Central 2012 CABIN-Geoscience 2 4.09 3.63 Liard Petitot 2011 5 3.27

2006 CABIN-DFO 2 5.64

10E - Lower Liard 2006 CABIN-DFO 1 4.35 4.35

10F - Upper 2007 CABIN (DFO-Mackenzie) 8 3.6041 Mackenzie- Mills 3.64 Lake 2006 CABIN (DFO-Mackenzie) 3 3.7219 10G - Upper 2007 CABIN (DFO-Mackenzie) 8 4.3822 Mackenzie- 4.28 Camsell Band 2006 CABIN (DFO-Mackenzie) 2 3.8946 10H - Central 2007 CABIN (DFO-Mackenzie) 4 3.4638 Mackenzie- 2.96 Blackwater Lake 2006 CABIN (DFO-Mackenzie) 9 2.7368 10J - Great Bear 2006 CABIN (DFO-Mackenzie) 1 4.8261 4.83

2009 CABIN (NWT-Delta) 23 4.1715 10K - Central Mackenzie- The 2006 CABIN (DFO-Mackenzie) 1 2.4524 4.16 Ramparts 2005 CABIN (DFO-Mackenzie) 16 4.2489

2012 CABIN (NWT-Delta) 2 3.5103

2010 CABIN (NWT-Delta) 3 3.8802 5.32

10L - Lower 2009 CABIN (NWT-Delta) 21 5.7028 Mackenzie 2007 CABIN (NWT-Delta) 21 5.8507

2006 CABIN (NWT-Delta) 16 5.0314

2005 CABIN (NWT-Delta) 8 4.8226

2008 CABIN-YTG 17 4.24 4.44

2007 CABIN-YTG 15 4.48

2007 CABIN-YTG 8 4.81

10M - Peel River 2005 CABIN-BISY 3 3.88

2005 CABIN-BISY 3 3.14

2005 CABIN-BISY 4 3.70

1998 CABIN-BISY 6 5.40

TABLE . RESULTS OF MANN-KENDALL NON-PARAMETRIC TREND ANALYSIS OF HILSENHOFF'S BIOTIC INDEX OVER TIME IN THE LOWER MACKENZIE BASIN. Mann- Number Theil-Sen Kendall Mann-Kendall Basin Data Source Start Year End Year of Sites Slope Test Test p-value Statistic All 2005 2013 276 0.070687 4 0.754454 CABIN-DFO Mackenzie 2005 2007 96 0.12658 1 1 Lower Mackenzie CABIN-Geoscience 2011 2013 18 0.507581 3 0.29627 CABIN-NWT Delta 2009 2012 71 0.009002 1 1 CABIN-YTG 2007 2011 87 -0.00668 -1 1 10C - Fort Nelson All 2011 2013 9 0.411527 3 0.29627 10D - Central All Liard Petitot 2006 2013 11 -0.00394 -4 0.701671 10K - Central Mackenzie - The All Ramparts 2005 2009 40 -0.01936 -2 0.794003 10L - Lower All Mackenzie 2005 2012 65 -0.09486 -4 0.706197

WWF-Canada Watershed Report for the Lower Mackenzie Watershed. 73 Disclaimer: This analysis reflects currently accessible and available data that aligns with our nationally consistent suite of indicators, as of June 2015.

FRESHWATER THREATS ASSESSMENT

SUMMARY

TABLE. OVERALL SCORING RESULTS FRESHWATER THREATS ASSESSMENT OF LOWER MACKENZIE WATERSHED, BY SUB-WATERSHED AND PEARSE WATERSHED

SUB WATERSHED SCORE PEARSE FINAL BASIN SCORE WSCSDA SUB WATERSHED NAME SCORE (MEDIAN) THREAT CLASSIFICATION Low 07L Fond-du-Lac SCORE 32.5 THREAT CLASSIFICATION Low 07M Lake Athabasca - Shores SCORE 25 THREAT CLASSIFICATION Low 07N Slave SCORE 25 THREAT CLASSIFICATION Moderate 07O Hay SCORE 40 THREAT CLASSIFICATION Low 07P Southern Great Slave Lake SCORE 25 Great Slake Lake - East Arm THREAT CLASSIFICATION Low 07Q South Shore SCORE 20 THREAT CLASSIFICATION Low 07R Lockhart SCORE 20 Northeastern Great Slave THREAT CLASSIFICATION Moderate 07S Lake SCORE 40 THREAT CLASSIFICATION Low 07T Marian SCORE 25 THREAT CLASSIFICATION Low 07U Western Great Slave Lake SCORE 20 THREAT CLASSIFICATION Low 10A Upper Liard SCORE 22.5 THREAT CLASSIFICATION Low Lower 10B Central Liard Mackenzie SCORE 25 THREAT CLASSIFICATION Low 10C Fort Nelson SCORE 25 THREAT CLASSIFICATION Low 10D Central Liard - Petitot SCORE 33.33 THREAT CLASSIFICATION Low 10E Lower Liard SCORE 20 Upper Mackenzie - Mills THREAT CLASSIFICATION Very low 10F Lake SCORE 10 Upper Mackenzie - Camsell THREAT CLASSIFICATION Low 10G Bend SCORE 22.5 Central Mackenzie - THREAT CLASSIFICATION Moderate 10H Blackwater Lake SCORE 42.5 THREAT CLASSIFICATION Very low 10J Great Bear SCORE 12.5 Central Mackenzie - The THREAT CLASSIFICATION Moderate 10K Ramparts SCORE 42.5 THREAT CLASSIFICATION Low 10L Lower Mackenzie SCORE 22.5 Peel and Southwestern THREAT CLASSIFICATION Very low 10M Beaufort Sea SCORE 12.5 OVERALL PEARSE BASIN SCORE THREAT CLASSIFICATION Low SCORE 25.78

WWF-Canada Watershed Report for the Lower Mackenzie Watershed. 74 Disclaimer: This analysis reflects currently accessible and available data that aligns with our nationally consistent suite of indicators, as of June 2015.

TABLE. SCORING RESULTS FRESHWATER THREAT INDICATORS OF LOWER MACKENZIE WATERSHED, BY SUB-WATERSHED AND PEARSE WATERSHED

SUB WATERSHED SCORE PEARSE BASIN CLIMATE ALTERATION OF WATER WATER HABITAT WATERSHED AREA RELATIVE WATERSHED WSCSDA SUB WATERSHED NAME INDICATOR POLLUTION CHANGE FLOWS INVASIVE SPECIES FRAGMENTATION USE LOSS (m2) AREA Low Moderate No threat reported Unknown Very low Low Very High 07L Fond-du-Lac THREAT CLASSIFICATION 68,570,266,827 5.45% SCORE 40 66.67 0 -9999 20 25 100 THREAT CLASSIFICATION Low Low No threat reported Very low Very low Low Very High 07M Lake Athabasca - Shores 31,076,664,660 2.47% SCORE 40 33.33 0 20 20 25 100 THREAT CLASSIFICATION No threat reported Moderate No threat reported Very low Low Low High 07N Slave 16,542,360,483 1.32% SCORE 0 66.67 0 20 40 25 80 THREAT CLASSIFICATION Low Moderate Very low Unknown Low Low Moderate 07O Hay 49,894,952,472 3.97% SCORE 40 66.67 20 -9999 40 25 60 THREAT CLASSIFICATION Low Moderate No threat reported No threat reported Very low Low Very High 07P Southern Great Slave Lake 32,888,299,668 2.62% SCORE 40 66.67 0 0 10 25 100 Great Slake Lake - East Arm THREAT CLASSIFICATION No threat reported Moderate No threat reported No threat reported Very low Low High 07Q 93,432,269,848 7.43% South Shore SCORE 0 66.67 0 0 20 25 80 THREAT CLASSIFICATION Moderate Low No threat reported No threat reported Very low Low Very low 07R Lockhart 26,393,660,057 2.10% SCORE 60 33.33 0 0 20 25 20 THREAT CLASSIFICATION Low Low Moderate No threat reported Moderate Low Low Lower 07S Northeastern Great Slave Lake 66,916,586,882 5.32% Mackenzie SCORE 40 33.33 60 0 50 25 40 THREAT CLASSIFICATION Low Moderate No threat reported No threat reported Very low Low Moderate 07T Marian 23,608,645,900 1.88% SCORE 40 66.67 0 0 10 25 60 THREAT CLASSIFICATION Very low Low No threat reported No threat reported Very low Low High 07U Western Great Slave Lake 30,024,404,240 2.39% SCORE 20 33.33 0 0 20 25 80 THREAT CLASSIFICATION No threat reported High No threat reported Very low Unknown Low Moderate 10A Upper Liard 59,992,261,838 4.77% SCORE 0 100 0 20 -9999 25 60 THREAT CLASSIFICATION Very low Moderate No threat reported Unknown Unknown Low Low 10B Central Liard 69,881,857,068 5.56% SCORE 20 66.67 0 -9999 -9999 25 40 THREAT CLASSIFICATION Very High Moderate No threat reported Unknown Unknown Low Very low 10C Fort Nelson 53,192,274,887 4.23% SCORE 100 66.67 0 -9999 -9999 25 20 THREAT CLASSIFICATION Low Low No threat reported Unknown Unknown Low High 10D Central Liard - Petitot 29,638,079,781 2.36% SCORE 40 33.33 0 -9999 -9999 25 80 THREAT CLASSIFICATION Very low Moderate No threat reported No threat reported Unknown Low Very low 10E Lower Liard 53,903,240,257 4.29% SCORE 20 66.67 0 0 -9999 25 20 10F Upper Mackenzie - Mills Lake THREAT CLASSIFICATION No threat reported Low No threat reported No threat reported Unknown Low Very low 49,513,491,839 3.94%

WWF-Canada Watershed Report for the Lower Mackenzie Watershed. 75 Disclaimer: This analysis reflects currently accessible and available data that aligns with our nationally consistent suite of indicators, as of June 2015.

SUB WATERSHED SCORE PEARSE BASIN CLIMATE ALTERATION OF WATER WATER HABITAT WATERSHED AREA RELATIVE WATERSHED WSCSDA SUB WATERSHED NAME INDICATOR POLLUTION CHANGE FLOWS INVASIVE SPECIES FRAGMENTATION USE LOSS (m2) AREA SCORE 0 33.33 0 0 -9999 25 20 THREAT CLASSIFICATION Low Low No threat reported No threat reported Unknown Low Very low 10G Upper Mackenzie - Camsell Bend 56,168,217,426 4.47% SCORE 40 33.33 0 0 -9999 25 20 Central Mackenzie - Blackwater THREAT CLASSIFICATION Moderate Moderate No threat reported No threat reported Unknown Low Moderate 10H 65,375,749,343 5.20% Lake SCORE 60 66.67 0 0 -9999 25 60 THREAT CLASSIFICATION No threat reported Moderate No threat reported No threat reported Unknown Low Low 10J Great Bear 154,647,858,345 12.30% SCORE 0 66.67 0 0 -9999 25 40 Central Mackenzie - The THREAT CLASSIFICATION High Moderate No threat reported No threat reported Unknown Low Moderate 10K 45,635,944,334 3.63% Ramparts SCORE 80 66.67 0 0 -9999 25 60 THREAT CLASSIFICATION Very low Moderate No threat reported No threat reported Unknown Low Low 10L Lower Mackenzie 75,367,854,318 5.99% SCORE 20 66.67 0 0 -9999 25 40 Peel and Southwestern Beaufort THREAT CLASSIFICATION No threat reported Moderate No threat reported No threat reported Unknown Low Low 10M 104,260,661,925 8.29% Sea SCORE 0 66.67 0 0 -9999 25 40 OVERALL PEARSE BASIN SCORE THREAT CLASSIFICATION Low Moderate Very low Very low Unknown Low Moderate SCORE 26.57 60.6 3.99 1.71 -9999 25 51.84

WWF-Canada Watershed Report for the Lower Mackenzie Watershed. 76 Disclaimer: This analysis reflects currently accessible and available data that aligns with our nationally consistent suite of indicators, as of June 2015.

SUB-INDICATOR SCORES BY SUB-WATERSHED

POLLUTION

TABLE. SCORING RESULTS OF POLLUTION THREAT BY SUB-INDICATOR AND SUB-WATERSHED

SUB-INDICATOR Point Source Pollution Pipeline incidents Transportation Incidents Agricultural Contamination SUB-SUB-INDICATOR Risk of Water Contamination by N Risk of Water Contamination by Pesticides Risk of Water Contamination by P WSCSDA SUB WATERSHED NAME Value Score Threat Classification Value Score Threat Classification Value Score Threat Classification Value Score Threat Classification Value Score Threat Classification Value Score Threat Classification 07L Fond-du-Lac 932.73 40 Low 0 0 None 0 0 None 0 0 None 0 0 None 0 0 None 07M Lake Athabasca - Shores 294.01 40 Low 0 0 None 4 20 Very Low 0 0 None 0 0 None 0 0 None 07N Slave 0 0 None 0 0 None 0 0 None 0 0 None 0 0 None 0 0 None 07O Hay 1.01 20 Very Low 16500 40 Low 0 0 None 0 20 Very Low 0 20 Very Low 0 20 Very Low

07P Southern Great Slave Lake 0 0 None 0 0 None 20 40 Low 0 0 None 0 0 None 0 20 Very Low Great Slave Lake - East Arm South 0 0 None -9999 -9999 Unknown 0 0 None 0 0 None None None 07Q Shore 0 0 0 0

07R Lockhart 3164.22 60 Moderate 0 0 None 0 0 None 0 0 None 0 0 None 0 0 None

07S Northeastern Great Slave Lake 828.04 40 Low 0 0 None 2 20 Very Low 0 0 None 0 0 None 0 0 None

07T Marian 0 0 None 0 0 None 13 40 Low 0 0 None 0 0 None 0 0 None

07U Western Great Slave Lake 0 0 None 10000 20 Very Low 0 0 None 0 0 None 0 0 None 0 0 None

10A Upper Liard 0 0 None 0 0 None 0 0 None 0 0 None 0 0 None 0 0 None

10B Central Liard 0 0 None 0 0 None 4 20 Very Low 0 0 None 0 0 None 0 0 None

10C Fort Nelson 5.32 20 Very Low 9.3E+08 100 Very High 0 0 None 0.02 20 Very Low 0 0 None 0 20 Very Low

10D Central Liard - Petitot 0 0 None 0 0 None 10 40 Low 0 0 None 0 0 None 0 0 None

10E Lower Liard 0 0 None 200 20 Very Low 0 0 None 0 0 None 0 0 None 0 0 None

10F Upper Mackenzie - Mills Lake 0 0 None 0 0 None 0 0 None 0 0 None 0 0 None 0 0 None

10G Upper Mackenzie - Camsell Bend 0 0 None 20000 40 Low 0 0 None 0 0 None 0 0 None 0 0 None Central Mackenzie - Blackwater 0 0 None 259003 60 Moderate 0 0 None 0 0 None None None 10H Lake 0 0 0 0

10J Great Bear 0 0 None 0 0 None 0 0 None 0 0 None 0 0 None 0 0 None Central Mackenzie - The 47.83 20 Very Low 4.2E+07 80 High 0 0 None 0 0 None None None 10K Ramparts 0 0 0 0

10L Lower Mackenzie 0 0 None 0 0 None 2 20 Very Low 0 0 None 0 0 None 0 0 None Peel and Southwestern Beaufort 0 0 None 0 0 None 0 0 None 0 0 None None None 10M Sea 0 0 0 0

WWF-Canada Watershed Report for the Lower Mackenzie Watershed. 77 Disclaimer: This analysis reflects currently accessible and available data that aligns with our nationally consistent suite of indicators, as of June 2015.

CLIMATE CHANGE

TABLE. SCORING RESULTS OF CLIMATE CHANGE THREAT BY SUB-INDICATOR AND SUB-WATERSHED

SUB-INDICATOR Summer Maximum Temperature Spring Precipitation Anomaly Summer Precipitation Anomaly Winter Mean Temperature Anomaly Anomaly WSCSDA SUB WATERSHED NAME Value Score Threat Classification Value Score Threat Classification Value Score Threat Classification Value Score Threat Classification 07L Fond-du-Lac 0 33.33 Low 1.49 66.67 Moderate -0.06 66.67 Moderate 0.1 33.33 Low 07M Lake Athabasca - Shores 0 33.33 Low 1.33 33.33 Low 0.01 33.33 Low 0.1 33.33 Low 07N Slave -0.12 66.67 Moderate 1.25 33.33 Low 0.07 33.33 Low 0.09 33.33 Low 07O Hay 0.04 33.33 Low 0.98 33.33 Low -0.05 66.67 Moderate 0.28 33.33 Low 07P Southern Great Slave Lake -0.13 66.67 Moderate 1.26 33.33 Low 0.11 33.33 Low 0.18 33.33 Low 07Q Great Slave Lake - East Arm South Shore -0.13 66.67 Moderate 1.65 66.67 Moderate 0.07 33.33 Low 0.06 33.33 Low 07R Lockhart -0.11 33.33 Low 1.31 33.33 Low 0.16 33.33 Low 0.29 33.33 Low 07S Northeastern Great Slave Lake -0.1 33.33 Low 1.1 33.33 Low 0.18 33.33 Low 0.29 33.33 Low 07T Marian -0.02 33.33 Low 0.52 33.33 Low 0.22 66.67 Moderate 0.42 33.33 Low 07U Western Great Slave Lake -0.07 33.33 Low 0.85 33.33 Low 0.16 33.33 Low 0.3 33.33 Low 10A Upper Liard -0.28 100 Very High -0.79 66.67 Moderate 0.06 33.33 Low 0.1 66.67 Moderate 10B Central Liard -0.11 33.33 Low -0.45 66.67 Moderate 0.02 33.33 Low 0.15 33.33 Low 10C Fort Nelson 0.08 33.33 Low 0.47 33.33 Low -0.08 66.67 Moderate 0.24 33.33 Low 10D Central Liard - Petitot 0 33.33 Low 0.41 33.33 Low 0.08 33.33 Low 0.32 33.33 Low 10E Lower Liard -0.13 66.67 Moderate -0.23 33.33 Low 0.15 33.33 Low 0.24 33.33 Low 10F Upper Mackenzie - Mills Lake 0.03 33.33 Low 0.54 33.33 Low 0.16 33.33 Low 0.33 33.33 Low 10G Upper Mackenzie - Camsell Bend -0.05 33.33 Low -0.1 33.33 Low 0.18 33.33 Low 0.27 33.33 Low 10H Central Mackenzie - Blackwater Lake -0.19 66.67 Moderate -0.31 33.33 Low 0.18 33.33 Low 0.11 33.33 Low 10J Great Bear -0.02 33.33 Low -0.34 33.33 Low 0.22 66.67 Moderate 0.41 33.33 Low 10K Central Mackenzie - The Ramparts -0.25 66.67 Moderate -0.61 66.67 Moderate 0.16 33.33 Low 0.02 33.33 Low 10L Lower Mackenzie -0.22 66.67 Moderate -0.62 66.67 Moderate 0.08 33.33 Low 0.11 33.33 Low 10M Peel and Southwestern Beaufort Sea -0.23 66.67 Moderate -0.36 66.67 Moderate 0.05 33.33 Low 0.12 33.33 Low

WWF-Canada Watershed Report for the Lower Mackenzie Watershed. 78 Disclaimer: This analysis reflects currently accessible and available data that aligns with our nationally consistent suite of indicators, as of June 2015.

ALTERATION OF WATER FLOWS

TABLE. SCORING RESULTS OF ALTERATION OF WATER FLOWS THREAT BY SUB-INDICATOR AND SUB-WATERSHED

SUB-INDICATOR Area of Reservoirs/Dams WSCSDA SUB WATERSHED NAME Value Score Threat Classification 07L Fond-du-Lac 0 0 None 07M Lake Athabasca - Shores 0 0 None 07N Slave 0 0 None 07O Hay 6.1 20 Very Low 07P Southern Great Slave Lake 0 0 None 07Q Great Slave Lake - East Arm South Shore 0 0 None 07R Lockhart 0 0 None 07S Northeastern Great Slave Lake 149 60 Moderate 07T Marian 0 0 None 07U Western Great Slave Lake 0 0 None 10A Upper Liard 0 0 None 10B Central Liard 0 0 None 10C Fort Nelson 0 0 None 10D Central Liard - Petitot 0 0 None 10E Lower Liard 0 0 None 10F Upper Mackenzie - Mills Lake 0 0 None 10G Upper Mackenzie - Camsell Bend 0 0 None 10H Central Mackenzie - Blackwater Lake 0 0 None 10J Great Bear 0 0 None 10K Central Mackenzie - The Ramparts 0 0 None 10L Lower Mackenzie 0 0 None 10M Peel and Southwestern Beaufort Sea 0 0 None

INVASIVE SPECIES

TABLE. SCORING RESULTS OF INVASIVE SPECIES THREAT BY SUB-INDICATOR AND SUB-WATERSHED

SUB-INDICATOR Presence of Invasive Species WSCSDA SUB WATERSHED NAME Value Score Threat Classification - - 07L Fond-du-Lac 9999 9999 Unknown 07M Lake Athabasca - Shores 2 20 Very Low 07N Slave 2 20 Very Low - - 07O Hay 9999 9999 Unknown 07P Southern Great Slave Lake 0 0 None Great Slave Lake - East Arm South 07Q Shore 0 0 None 07R Lockhart 0 0 None 07S Northeastern Great Slave Lake 0 0 None 07T Marian 0 0 None 07U Western Great Slave Lake 0 0 None 10A Upper Liard 2 20 Very Low - - 10B Central Liard 9999 9999 Unknown - - 10C Fort Nelson 9999 9999 Unknown - - 10D Central Liard - Petitot 9999 9999 Unknown 10E Lower Liard 0 0 None 10F Upper Mackenzie - Mills Lake 0 0 None 10G Upper Mackenzie - Camsell Bend 0 0 None 10H Central Mackenzie - Blackwater Lake 0 0 None 10J Great Bear 0 0 None 10K Central Mackenzie - The Ramparts 0 0 None 10L Lower Mackenzie 0 0 None 10M Peel and Southwestern Beaufort Sea 0 0 None

WWF-Canada Watershed Report for the Lower Mackenzie Watershed. 79 Disclaimer: This analysis reflects currently accessible and available data that aligns with our nationally consistent suite of indicators, as of June 2015.

WATER USE

TABLE. SCORING RESULTS OF WATER USE THREAT BY SUB-INDICATOR AND SUB-WATERSHED

SUB-INDICATOR Water Use WSCSDA SUB WATERSHED NAME Value Score Threat Classification 07L Fond-du-Lac N/A 25 Low 07M Lake Athabasca - Shores N/A 25 Low 07N Slave N/A 25 Low 07O Hay N/A 25 Low 07P Southern Great Slave Lake N/A 25 Low Great Slave Lake - East Arm South 07Q Shore N/A 25 Low 07R Lockhart N/A 25 Low 07S Northeastern Great Slave Lake N/A 25 Low 07T Marian N/A 25 Low 07U Western Great Slave Lake N/A 25 Low 10A Upper Liard N/A 25 Low 10B Central Liard N/A 25 Low 10C Fort Nelson N/A 25 Low 10D Central Liard - Petitot N/A 25 Low 10E Lower Liard N/A 25 Low 10F Upper Mackenzie - Mills Lake N/A 25 Low 10G Upper Mackenzie - Camsell Bend N/A 25 Low 10H Central Mackenzie - Blackwater Lake N/A 25 Low 10J Great Bear N/A 25 Low 10K Central Mackenzie - The Ramparts N/A 25 Low 10L Lower Mackenzie N/A 25 Low 10M Peel and Southwestern Beaufort Sea N/A 25 Low

FRAGMENTATION

TABLE. SCORING RESULTS OF FRAGMENTATION THREAT BY SUB-INDICATOR AND SUB-WATERSHED

SUB-INDICATOR Fragmentation by dams Fragmentation by roads and rail WSCSDA SUB WATERSHED NAME Value Score Threat Classification Value Score Threat Classification 07L Fond-du-Lac 0.17 20 Very Low 0.0001 20 Very Low 07M Lake Athabasca - Shores 0.03 20 Very Low 0.0001 20 Very Low 07N Slave 0.57 60 Moderate 0.0001 20 Very Low 07O Hay 0.19 20 Very Low 0.0022 60 Moderate 07P Southern Great Slave Lake 0 0 None 0.0001 20 Very Low

07Q Great Slave Lake - East Arm South Shore 0.21 20 Very Low 0.0001 20 Very Low 07R Lockhart 0 0 None 0.0002 40 Low 07S Northeastern Great Slave Lake 0.37 40 Low 0.0008 60 Moderate 07T Marian 0 0 None 0.0001 20 Very Low 07U Western Great Slave Lake 0 20 Very Low 0.0001 20 Very Low - - 10A Upper Liard 9999 9999 Unknown -9999 -9999 Unknown - - 10B Central Liard 9999 9999 Unknown -9999 -9999 Unknown - - 10C Fort Nelson 9999 9999 Unknown -9999 -9999 Unknown - - 10D Central Liard - Petitot 9999 9999 Unknown -9999 -9999 Unknown - - 10E Lower Liard 9999 9999 Unknown -9999 -9999 Unknown - - 10F Upper Mackenzie - Mills Lake 9999 9999 Unknown -9999 -9999 Unknown - - 10G Upper Mackenzie - Camsell Bend 9999 9999 Unknown -9999 -9999 Unknown - - 10H Central Mackenzie - Blackwater Lake 9999 9999 Unknown -9999 -9999 Unknown - - 10J Great Bear 9999 9999 Unknown -9999 -9999 Unknown - - 10K Central Mackenzie - The Ramparts 9999 9999 Unknown -9999 -9999 Unknown - - 10L Lower Mackenzie 9999 9999 Unknown -9999 -9999 Unknown - - 10M Peel and Southwestern Beaufort Sea 9999 9999 Unknown -9999 -9999 Unknown

WWF-Canada Watershed Report for the Lower Mackenzie Watershed. 80 Disclaimer: This analysis reflects currently accessible and available data that aligns with our nationally consistent suite of indicators, as of June 2015.

HABITAT LOSS

TABLE. SCORING RESULTS OF HABITAT LOSS THREAT BY SUB-INDICATOR AND SUB-WATERSHED

SUB-INDICATOR Land use/Land cover Forest loss WSCSDA SUB WATERSHED NAME Value Score Threat Classification Value Score Threat Classification 07L Fond-du-Lac 0.05 20 Very Low 28.4 100 Very High 07M Lake Athabasca - Shores 0.04 20 Very Low 37.51 100 Very High 07N Slave 0.09 20 Very Low 14.23 80 High 07O Hay 0.2 20 Very Low 4.76 60 Moderate 07P Southern Great Slave Lake 0.11 20 Very Low 28.23 100 Very High 07Q Great Slave Lake - East Arm South Shore 0 20 Very Low 16.76 80 High 07R Lockhart 0 0 None 0.12 20 Very Low 07S Northeastern Great Slave Lake 0.03 20 Very Low 1.55 40 Low 07T Marian 0.01 20 Very Low 6.79 60 Moderate 07U Western Great Slave Lake 0.06 20 Very Low 9.23 80 High 10A Upper Liard 0.1 20 Very Low 4.65 60 Moderate 10B Central Liard 0.02 20 Very Low 3.43 40 Low 10C Fort Nelson 0.28 20 Very Low 0.76 20 Very Low 10D Central Liard - Petitot 0.11 20 Very Low 11.8 80 High 10E Lower Liard 0.03 20 Very Low 1.02 20 Very Low 10F Upper Mackenzie - Mills Lake 0.06 20 Very Low 1.22 20 Very Low 10G Upper Mackenzie - Camsell Bend 0.02 20 Very Low -0.06 0 None 10H Central Mackenzie - Blackwater Lake 0.01 20 Very Low 4.58 60 Moderate 10J Great Bear 0 20 Very Low 2.52 40 Low 10K Central Mackenzie - The Ramparts 0.01 20 Very Low 5 60 Moderate 10L Lower Mackenzie 0.02 20 Very Low 3.02 40 Low 10M Peel and Southwestern Beaufort Sea 0.02 20 Very Low 3.19 40 Low

WWF-Canada Watershed Report for the Lower Mackenzie Watershed. 81 Disclaimer: This analysis reflects currently accessible and available data that aligns with our nationally consistent suite of indicators, as of June 2015.