Clean Lakes Program: Big Otter - Steuben County

 

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Indiana Clean Lakes Program Lake Report

Big Otter

 

Steuben County

1989

         
Sample Location: Deep Hole
Sample Date: 1989-07-12
Year
Max Depth
(m)
Secchi
(m)
Light 3'
(%)
1% Light Level
(ft)
DO @5'
(%)
pH
Epi
pH
Hypo
Cond
Epi
Cond
Hypo
Alk
Epi
Alk
Hypo
SRP
Epi
SRP
Hypo
TP
Epi
TP
Hypo
Chl-a
(ug/L)
NO3
Epi
NO3
Hypo
NH3
Epi
NH3
Hypo
TKN
Epi
TKN
Hypo
1989
11.9
2
15
10
101
8.3
7
630
470
188.5
200.5
0.008
0.086
0.078
0.153
0.59
0.953
0.055
1.063
1.342
2.284
Depth (m)
 0 
 1 
1.5
 2 
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
Temp (oC)
26.3
26.3
23.3
18
14.3
12.2
10
8
7.2
7
6.8
6.2
DO (mg/L)
8.2
8.5
7.5
1
0.4
0.4
0.4
0.5
0.2
0.1
0.1
0.1
                                                                           
% Water Column Oxic: 75
 
Blue-Green Dominance (% of NU): 95
 
          Carlson TSI: 59
                    Indiana TSI: 42
                                                                           
Blue-Greens (#/L): 112561   Greens (#/L): 800   Diatoms (#/L): 1600   Other Algae (#/L): 2934   Rotifers (#/L): 297   Zooplankton (#/L): 0
 
 

1992

         
Sample Location: Deep Hole
Sample Date: 1992-07-20
Year
Max Depth
(m)
Secchi
(m)
Light 3'
(%)
1% Light Level
(ft)
DO @5'
(%)
pH
Epi
pH
Hypo
Cond
Epi
Cond
Hypo
Alk
Epi
Alk
Hypo
SRP
Epi
SRP
Hypo
TP
Epi
TP
Hypo
Chl-a
(ug/L)
NO3
Epi
NO3
Hypo
NH3
Epi
NH3
Hypo
TKN
Epi
TKN
Hypo
1992
11.9
2.9
48
22
100.02
8
7.5
590
600
264
199
0.005
0.043
0.055
0.048
1.271
1.56
0.03
1.356
1.035
0.881
Depth (m)
 0 
 1 
1.5
 2 
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
Temp (oC)
23.8
23.5
23.5
23.5
20.2
17.1
13
9.8
8
7.2
7
6.2
DO (mg/L)
8.5
8.4
8.3
8.3
3.9
0.8
0.3
0.1
0
0
0
0
                                                                           
% Water Column Oxic: 49.6
 
Blue-Green Dominance (% of NU): 3
 
          Carlson TSI: 54
                    Indiana TSI: 17
                                                                           
Blue-Greens (#/L): 136   Greens (#/L): 273   Diatoms (#/L): 870   Other Algae (#/L): 2269   Rotifers (#/L): 883   Zooplankton (#/L): 0
 
 

1997

         
Sample Location: Deep Hole
Sample Date: 1997-07-29
Year
Max Depth
(m)
Secchi
(m)
Light 3'
(%)
1% Light Level
(ft)
DO @5'
(%)
pH
Epi
pH
Hypo
Cond
Epi
Cond
Hypo
Alk
Epi
Alk
Hypo
SRP
Epi
SRP
Hypo
TP
Epi
TP
Hypo
Chl-a
(ug/L)
NO3
Epi
NO3
Hypo
NH3
Epi
NH3
Hypo
TKN
Epi
TKN
Hypo
1997
11.9
2.4
40
18
125.8
8.34
7.62
650
490
212.8
236.4
0.002
0.187
0.01
0.243
4.77
0.034
0.046
0.018
1.007
0.232
1.762
Depth (m)
 0 
 1 
1.5
 2 
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
Temp (oC)
26.1
26.1
26
26
24.8
22
18.8
15.2
12.5
11
10
9
8.5
DO (mg/L)
10.2
10.2
10.2
10.2
10.2
7
5.9
1.7
1
0.6
0
0
0
                                                                           
% Water Column Oxic: 75
 
Blue-Green Dominance (% of NU): 82
 
          Carlson TSI: 43
                    Indiana TSI: 26
                                                                           
Blue-Greens (#/L): 12039   Greens (#/L): 25   Diatoms (#/L): 836   Other Algae (#/L): 1647   Rotifers (#/L): 114   Zooplankton (#/L): 12
 
 

2002

         
Sample Location: Deep Hole
Sample Date: 2002-07-01
Year
Max Depth
(m)
Secchi
(m)
Light 3'
(%)
1% Light Level
(ft)
DO @5'
(%)
pH
Epi
pH
Hypo
Cond
Epi
Cond
Hypo
Alk
Epi
Alk
Hypo
SRP
Epi
SRP
Hypo
TP
Epi
TP
Hypo
Chl-a
(ug/L)
NO3
Epi
NO3
Hypo
NH3
Epi
NH3
Hypo
TKN
Epi
TKN
Hypo
2002
11.9
4.2
33
16
101.9
8.2
7.7
690
445
241
246
0.008
0.249
0.027
0.297
0.03
0.187
0.215
0.096
1.139
0.545
1.606
Depth (m)
 0 
 1 
1.5
 2 
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
Temp (oC)
29.3
29.3
29.3
29.2
24
19.3
15.1
12.8
11.3
10.4
9.2
7.9
7.2
6.6
DO (mg/L)
7.95
7.96
7.97
7.97
9.29
7.34
6.12
6.02
4.84
4.21
2.42
0.57
0.35
0.31
                                                                           
% Water Column Oxic: 73.8
 
Blue-Green Dominance (% of NU): 94
 
          Carlson TSI: 29
                    Indiana TSI: 28
                                                                           
Blue-Greens (#/L): 49309   Greens (#/L): 329   Diatoms (#/L): 164   Other Algae (#/L): 2445   Rotifers (#/L): 105   Zooplankton (#/L): 36.1
 
 

2009

         
Sample Location: Deep Hole
Sample Date: 2009-06-30
Year
Max Depth
(m)
Secchi
(m)
Light 3'
(%)
1% Light Level
(ft)
DO @5'
(%)
pH
Epi
pH
Hypo
Cond
Epi
Cond
Hypo
Alk
Epi
Alk
Hypo
SRP
Epi
SRP
Hypo
TP
Epi
TP
Hypo
Chl-a
(ug/L)
NO3
Epi
NO3
Hypo
NH3
Epi
NH3
Hypo
TKN
Epi
TKN
Hypo
2009
11.6
2.5
11.31
14.25
86
8.2
7.5
543
367.3
223
200
0.01
0.105
0.036
0.123
8.74
0.274
0.645
0.076
0.221
0.608
1.024
Depth (m)
 0 
 1 
1.5
 2 
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
Temp (oC)
23.7
23.7
23.7
23.7
23.7
21.5
16.9
13.7
11.1
9.2
8
7.4
7.3
DO (mg/L)
7.3
7.3
7.3
7
7.3
5.2
4.2
3.5
4
4.2
1.7
0.08
0.02
                                                                           
% Water Column Oxic: 67.22
 
Blue-Green Dominance (% of NU): 9.7
 
          Carlson TSI: 52
                    Indiana TSI: 19
                                                                           
Blue-Greens (#/L): 5096   Greens (#/L): 1147   Diatoms (#/L): 42077   Other Algae (#/L): 3453   Rotifers (#/L): 771   Zooplankton (#/L): 51.1
 
 

2015

         
Sample Location: deep hole
Sample Date: 2015-07-07
Year
Max Depth
(m)
Secchi
(m)
Light 3'
(%)
1% Light Level
(ft)
DO @5'
(%)
pH
Epi
pH
Hypo
Cond
Epi
Cond
Hypo
Alk
Epi
Alk
Hypo
SRP
Epi
SRP
Hypo
TP
Epi
TP
Hypo
Chl-a
(ug/L)
NO3
Epi
NO3
Hypo
NH3
Epi
NH3
Hypo
TKN
Epi
TKN
Hypo
2015
12.2
1.6
1.05
12.3
8.5
7.7
715
827
229
251
0.01
0.07
0.021
0.107
9.28
0.013
0.421
0.018
0.388
0.872
1.058
Depth (m)
 0 
 1 
1.5
 2 
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
Temp (oC)
25.2
25.2
23.9
21.9
18.9
13.8
10.7
9.5
8.9
8.4
8
7.5
DO (mg/L)
9.19
9.5
9.9
10.02
7.34
5.8
4.85
4.33
3.82
2.41
1
0.54
                                                                           
% Water Column Oxic: 73.77
 
Blue-Green Dominance (% of NU):
 
Blue-Green Dominance (% of cells):
          Carlson TSI: 56
                   
                                                                           
Blue-Greens (#/L):   Greens (#/L):   Diatoms (#/L):   Other Algae (#/L):   Rotifers (#/L):   Zooplankton (#/L):
Blue-Greens (cells/L):   Greens (cells/L):   Diatoms (cells/L):   Other Algae (cells/L):   Rotifers (cells/L):   Zooplankton (cells/L):
 
 

 

In 2011 CLP changed plankton sampling methods, thus the Indiana TSI is no longer calculated.
Epi
Epilimnion
Alk
Alkalinity (mg CaCO3/L)
DO
Dissolved Oxygen (mg/L)
NH3
Ammonia (mg-N/L)
SRP
Soluable Reactive Phosphorus (mg-P/L)
Hypo
Hypolimnion
Chl-a
Chlorophyll-a (ug/L)
Light 3'
Percent light penetration at 3ft
NO3
Nitrate (mg-N/L)
TP
Total Phosphorus (mg-P/L)
   
Cond
Conductivity
1% Light Level
Depth of the 1% light level (ft)
TKN
Total Kjeldahl Nitrogen (mg-N/L)
Temp
Temperature (oC)