Data Comparisons – Part 1
Teams 2 & 8 locations
jmm 3/10
P
P N
O Water flow – O location
• Measured water flow in stream by month & year 2003 to 2009 2004 had higher flows thru-out year, spring always the highest 3.5 3 water flows 2.5 c 2 1.5 1 0.5 flow rate, c3/se 0 ay ber ber ber july april m june arch m august january october february novem decem septem month O water temperature
25
20
15
10 temperature, C
5
0 JF1 MJAM J A S O N D months monitoring at location O
450 Specific Conductance at O 400
350
300
250
200 S cm micro / 150
100
50
0 1 5 9 131721252933374145495357616569737781 data points 2003-2009
• Conductivity - samples collected in order. Data appears to be very random, scattered, high variability. Conductivity at the 3 sample locations
700
600 ONP compare
500 P 400
300
conductance 200
100 O N 0 1 4 7 10 13 16 19 22 25 28 31 34 37 40 43 46 49 52 55 58 61 64 67 70 73 76 79 points orderred in time
• Data remains consistent for same stream (O&N, blue & red) • Data is different for different streams (O&N vs P, yellow) O location - conductivity values regrouped by month
450
400
350
300
250
200 cond 150
100
50 janapr july oct 0 1 4 7 1013161922252831343740434649525558616467 points by month • Group data by months, monthly average in red • Less scatter; shows some relationship with seasons Little Fishing Creek O Î N Lick Run P conductivity 700
600
500
400
300 conductivity, micro-S/cmconductivity, 200
100 range
0 02468101214 months total samples by month 400 alkalinity
350 alkalinity
300
250
200
150 alkalinity, mg/l alkalinity,
100
50
0 02468101214 month • Lick Run higher values than Little Fishing Creek why? limestone? - 2/05 at 360, 3/05 at 360, 10/04 at 320
total samples by month Alkalinity400 – is it temperature dependent? alkalinity 350
range 300
250
200 alkalinity, mg/l 150
100
50 low -5 0 5 10 15 20 25 30 35 water temperature, C
• Small temperature connection monthly pH for Little Fishing Creek
9 ave pH for month 8.8
8.6
8.4
8.2
8 pH O pH pH N 7.8
7.6
7.4
7.2 123456789101112 month • what happened in January? O => N • 7.7 => 8.6, 7.9 => 9.2 (only 2 samples) pH
P pH
9.0
8.5 H p
8.0
7.5 • Lick Run P greater variation. why? april & may lowest A= 6.7, 7.2, 7.8, 7.4 M= 7.2,7.2,6.7,7.6,8.1 (4 samples)
7.0 123456789101112 dissolved O2 for O location
14 13 12 11 10
O2,l / mg 9 8 7 6 123456789101112 month • Dissolved Oxygen • Little Fishing Creek O = blue, N = red • Lick Run P = yellow saturation = white
dissolved oxygen
25
20
15
oxygen, mg/loxygen, 10 stressed 5
0 fatal -5 0 5 10 15 20 25 30 35 water temperature, C 50 45 nitrates 40 high for drinking water nitrates 35
30
25
20 Nitrate O Nitrate N Nitrate P
nitrate, mg/l 15
10
5
0 02468101214 month
• Lick Run - more nitrates than Little Fishing Creek – why? 12/05 at 44, 3/06 at 26, 10/09 at 26 not seasonal Total phosphates
0.7 O Total Phosphate N Total Phosphate 0.6 123456789101112 0.5 0.7
0.4 0.5
0.3 mg / l 0.3 0.2 mg / l mg
0.1 0.1
0 1 2 3 4 5 6 7 8 9 10 11 12 -0.1
• Little Fishing Creek April • Little Fishing Creek - O flows to N 2009 – • Both locations had high analysis spikes, nitrates also both above at 2.9 and 3.6 (average = 2.6) • second highest total phosphate values in April also Is seasonal sulphates
• LFC always at 50 mg/l or less. Lick run always except 3 times (at 55, 60, 65 mg/l). • OK if under 150 mg/l. If above, likely due to a digging related issue, that exposes pyrite material to air and water, creating an acid forming situation. variable data – what is OK?
10 9.5 O nitrates P pH high 9 high 8.5 8 6 8
4 H 7.5 p mg / l mg 2 7 0 6.5 1214161 6 data per time 1 6 11 16 21 26 31 36 41 46 51 56 61 66 lowdata per time • April 2008 – high at 7.0 • Aug 2004 - high 9.3 pH • Nov 2004 - 9.4 • X + 2(dev) = 2.6 + 2(1.3) = 5.2 • Training? Conductance = high (569, 635) • within ave +/- 2(std deviations) = 95.5% • X + 3(dev) = 6.5 • within ave +/- 3(std deviations) = 99.7% • 8 pts acid (low 6.5-6.9 pH) • outside the range of expected value • 8 / 8 in years 2005-2007 • noted - previous day rain • 6 / 8 in Sept – Dec months (fall season) P - nitrates with lot variability, what is normal?
Nitrate
45
40
35
30 Data point at 44 nitrates mg / l / mg 25 12-7-05 20 water temperature = -2C
15 pH = 6.7 sulphate = 60 10
5
0 1 112131415161 data per time summary
• Expect two locations from same stream to have similar values in chemical analyses. example – upstream & downstream on Little Fishing Creek If not – wonder WHY • Can’t compare the analyses from different streams – differences in geology, land use, etc. example – Lick Run was consistently higher for conductivity, alkalinity, nitrates • Data results are dependent on time of year and type of activities. The comparison of past values in common seasons is probably more useful. • Normal? Can’t identify with only few data points.