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Appendix B Climatic and Hydrometric Data AECOM Alberta Flood Recovery Task Force Appendix B – Climatic and Hydrometric Data Appendix B Climatic and Hydrometric Data RPT3-2014-06-06-App_B_Sheep_River_Climatic_And_Hydrometric_Data.Docx AECOM Alberta Flood Recovery Task Force Appendix B – Climatic and Hydrometric Data Table of Contents page 1. Background ...................................................................................................................................................... 1 2. Climate Stations ............................................................................................................................................... 2 3. Hydrometric Data ............................................................................................................................................. 5 3.1 Largest Recorded Discharges .............................................................................................................. 5 3.2 Frequency Floods ................................................................................................................................. 5 3.3 WSC Summaries .................................................................................................................................. 6 3.3.1 05BL012 Sheep River at Okotoks ........................................................................................... 6 3.3.2 05BL013 Three Point Creek near Millarville ............................................................................ 8 3.3.3 05BL014 Sheep River at Black Diamond ................................................................................ 9 3.3.4 05BL018 Sheep River at Buck Ranch ................................................................................... 10 4. References...................................................................................................................................................... 12 5. Sign-Off ........................................................................................................................................................... 13 List of Figures Figure 2-1: Sheep River Basin Hydrometric and Climate Stations ............................................................................... 4 List of Tables Table 2-1: Climate Stations considered for the Sheep River Basin ............................................................................. 2 Table 2-2: Mean Monthly Air Temperatures (1981-2010) ............................................................................................ 3 Table 2-3: Monthly Precipitation (1981-2010) .............................................................................................................. 3 Table 3-1: Water Survey of Canada Hydrometric Stations in Sheep River Basin ........................................................ 5 Table 3-2: Ten Largest Mean Daily Discharges by WSC Station ................................................................................. 5 Table 3-3: Maximum Instantaneous Frequency Floods at 05BL014 ............................................................................ 6 Table 3-4: Annual Peak Instantaneous Discharge Range at 05BL012 ........................................................................ 6 Table 3-5: Minimum Open Water Discharges at 05BL012 ........................................................................................... 7 Table 3-6: Mean Monthly Discharges at 05BL012 ....................................................................................................... 7 Table 3-7: Freeze-Up Discharges at 05BL012 ............................................................................................................. 7 Table 3-8: Earliest Open Water Discharges at 05BL012 ............................................................................................. 7 Table 3-9: Peak Instantaneous Discharge at 05BL012 ................................................................................................ 7 Table 3-10: Annual Peak Instantaneous Discharge Range at 05BL013 ...................................................................... 8 Table 3-11: Minimum Open Water Discharges at 05BL013 ......................................................................................... 8 Table 3-12: Mean Monthly Discharges at 05BL013 ..................................................................................................... 8 Table 3-13: Freeze-Up Discharges at 05BL013 ........................................................................................................... 8 Table 3-14: Earliest Open Water Discharges at 05BL013 ........................................................................................... 8 Table 3-15: Peak Instantaneous Discharge at 05BL013 .............................................................................................. 9 RPT3-2014-06-06-App_B_Sheep_River_Climatic_And_Hydrometric_Data.Docx AECOM Alberta Flood Recovery Task Force Appendix B – Climatic and Hydrometric Data Table 3-16: Annual Peak Instantaneous Discharge Range at 05BL014 ...................................................................... 9 Table 3-17: Minimum Open Water Discharges at 05BL014 ......................................................................................... 9 Table 3-18: Minimum Discharges at 05BL014 ............................................................................................................. 9 Table 3-19: Mean Monthly Discharges at 05BL014 ................................................................................................... 10 Table 3-20: Freeze-Up Discharges at 05BL014 ......................................................................................................... 10 Table 3-21: Earliest Open Water Discharges at 05BL014 ......................................................................................... 10 Table 3-22: Peak Instantaneous Discharge at 05BL014 ............................................................................................ 10 Table 3-23: Annual Peak Instantaneous Discharge Range at 05BL018 .................................................................... 11 Table 3-24: Minimum Open Water Discharges at 05BL018 ....................................................................................... 11 Table 3-25: Mean Monthly Discharges at 05BL018 ................................................................................................... 11 Table 3-26: Freeze-Up Discharges at 05BL018 ......................................................................................................... 11 Table 3-27: Earliest Open Water Discharges at 05BL018 ......................................................................................... 11 RPT3-2014-06-06-App_B_Sheep_River_Climatic_And_Hydrometric_Data.Docx AECOM Alberta Flood Recovery Task Force Appendix B – Climatic and Hydrometric Data 1. Background In June 2013, southern Alberta experienced extensive flooding which impacted several communities in the Sheep River Basin, especially those directly along the Sheep River. The Sheep River originates in the Canadian Rockies Kananaskis area from Rae Creek. The river flows east through the Towns of Turner Valley, Black Diamond, and Okotoks and drains into the Highwood River near Aldersyde. The Sheep River has a drainage area of 1,494 km2 at Water Survey Canada (WSC) Station 05BL012 Sheep River at Okotoks upstream of the confluence with the Highwood River. A hydrological model was used to simulate flow representative of the June 2013 flood event. WSC flow data measured during the flood event was used to calibrate the model. Precipitation data from June 2013 was used as input for a hydrological model of the Sheep River Basin to estimate the runoff responsible for the June 2013 flood event. Fifteen minute interval precipitation data from climate stations within and surrounding the Sheep River Basin for 2013 was obtained from Alberta Environment and Sustainable Resource Development (AESRD) and any data gaps were supplemented with available precipitation data obtained from Alberta Agriculture and Rural Development (AARD). Additionally, WSC observed discharge data from June 2013 was used as input for the hydrological model of the Sheep River Basin to calibrate the flow and hydrograph resulting from the June 2013 flood event. The model incorporated sub-basins that were delineated based on WSC station locations where possible. Fifteen minute interval WSC discharge data from hydrometric stations in the Sheep River Basin for 2013 was obtained from AESRD. RPT3-2014-06-06-App_B_Sheep_River_Climatic_And_Hydrometric_Data.Docx 1 AECOM Alberta Flood Recovery Task Force Appendix B – Climatic and Hydrometric Data 2. Climate Stations Table 2-1 contains the climate stations that are located within and surrounding the Sheep River Basin that were considered for the hydrological model study and are shown in Figure 2-1. Precipitation recorded at Compression Ridge, Cox Hill, Evan-Thomas Creek, Kananaskis Boundary Auto, Little Elbow Summit, Peter Lougheed Park, and Three Isle Lake stations appeared not to significantly contribute to runoff in the Sheep River Basin since their area of influence falls beyond the Sheep River Basin; hence, these stations were not incorporated into the hydrological model. Additionally, the period of record available for the Okotoks’ climate station is daily, whereas the smallest period of record required for use in the hydrological model study is hourly.
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