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state of the lake 2012
2012 Report on Lake Wononscopomuc
This year we sampled 6 times. There were only 17 days of ice cover in the preceding winter and temperatures in the spring were higher than normal. Rainfall during the sampling season was very low.
Buoy 1 disappeared during the summer. Suspect that it was cut by fisherman.
Dissolved Oxygen: (Below trout survival level in red)
Date: 4/18/12 5/2/12 5/16/12 7/13/12 9/17/12 11/16/12
(after fall turnover)
Buoy A
10’ 103.7%/11.10 Missing 103/8.35 106.1/9.48 missing
30’ 96.7/11.70 99.7/11.50 98.3/10.77
50’ 83.8/10.40 48.0/5.90 10.5/.83
75’ 5.2/.70
Buoy B
10’ 103.8/11.0 94.3/10.39 101.2/9.97 99.0/8.06 107.5/9.31 74.9/8.71
30’ 100.5/11.91 93.8/10.96 88.0/10.14 93.2/10.27 104.8/9.45 73.7/8.51
50’ 91.2/11.12 74.4/9.02 58.1/8.24 39.1/4.73 60.3/7.09 68.1/7.92
95’ 71.8/10.11 58/7.20 44.9/5.1 5.4/.72 5.3/.62 7.1/.86
Buoy C
10’ 107.6/11.73 99.5/10.68 97.4/9.51 94.4/7.15 100.2/8.85 76.0/8.76
30’ 103.4/12.25 99.1/11.39 81.7/9.60 87.0/9.75 95.0/9.54 74.9/8.72
50’ 86.9/10.06 51.1/6.11 21.4/2.44 5.7/.74 4.4/.50 77.4/8.92
Temperature:
Date: 4/18/12 5/2/12 5/16/12 7/13/12 9/17/12 11/16/12
(after fall turnover)
Buoy A
10’ 11.1 missing missing 26.2 21.5 missing
30’ 8.0 11.2 13.1
50’ 6.3 7.5 7.5
75’ 6.1
Buoy B
10’ 11.9 11.8 15.6 26.0 21.9 9.0
30’ 8.0 8.5 9.8 10.1 20.6 8.9
50’ 6.8 7.0 7.3 7.6 8.4 8.8
95’ 5.9 6.1 6.2 6.2 6.3 6.4
Buoy C
10’ 11.4 11.5 15.7 26.4 21.4 8.9
30’ 8.3 9.2 9.4 10.2 12.2 8.8
50’ 7.6 7.7 7.8 7.9 8.3 8.7
Visibility:
Date: 4/18/12 5/2/12 5/16/12 7/13/12 9/17/12 11/16/12
Buoy A 4.0 missing missing 3.25 5.5 missing
Buoy B 4.0 3.0 3.0 2.75 4.5 3.50
Buoy C 3.75 3.0 3.0 3.0 4.5 2.75
pH
Date: 5/2/12
Buoy B
surface 8.5
Buoy C
surface 8.4
Conductivity:
Date: 5/16/12 11/16/12
Buoy A
Buoy B
10’ 265.9
30’ 233.4
50’ 219.9 219.5
95’
Buoy C
10’ 268.0
30’ 238.2
50’ 224.5
Temperature Profiles:
4/18/12
Surf 12.4
5’ 12.4
10’ 12.4
15’ 11.5
Thermocline beginning to set up
20’ 9.1
25’ 8.1
30’ 8.0
35’ 7.7
40’ 7.3
45’ 6.9
50’ 6.8
55’ 6.4
60’ 6.2
65’ 6.1
70’ 6.0
75’ 6.0
80’ 6.0
85’ 6.0
90’ 5.9
Temp Profile: 9/17/2012….Buoy B
5’ 22.6
10’ 22.4
15’ 21.9
20’ 21.8
25’ 21.6
30’ 20.6
Thermocline
35’ 16.8
40’ 12.2
45’ 9.8
50’ 8.4
55’ 7.7
60’ 7.2
65’ 7.0
70’ 6.7
75’ 6.5
80’ 6.4
85’ 6.3
90’ 6.2
95’ 6.2
Temp profile 11/16/12….Buoy B
5’ 9.1
10’ 9.1
15’ 9.0
20’ 9.0
25’ 8.9
30’ 8.9
35’ 8.9
40’ 8.9
45’ 8.9
50’ 8.8
55’ 8.4
60’ 7.2
65’ 6.8
70’ 6.7
75’ 6.5
80’ 6.5
85’ 6.4
90’ 6.4
95’ 6.4
P Sampling
9/17/12 Buoy B
10’ 0.014 mg/L
30’ 0.016 mg/L
50’ 0.03 mg/L
95’ 0.201 mg/L below all fish survival level
11/16/12
95’ Buoy B .056 mg/L
50’ Buoy C .022 mg/L