Clean Lakes Program: Lake of the Woods - Marshall County

 

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Indiana Clean Lakes Program Lake Report

Lake of the Woods

  

Marshall County

1991

          
Sample Location: Deep Hole
Sample Date: 1991-08-20
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
1991
14.6
1
20
9
82
8.4
6.8
400
370
131.7
238.7
0.01
0.094
0.033
0.113
0.532
1.506
0.051
4.429
1.623
6.032
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)
24
24
24
23.9
23.9
23.9
23.3
19.4
16
14.8
14.2
14
14
14
13.9
DO (mg/L)
7.1
6.9
6.9
7
7.2
7.2
5.4
0.6
0.6
0.6
0.6
0.6
0.6
0.6
0.6
                                                                           
% Water Column Oxic: 38
  
Blue-Green Dominance (% of NU): 20
  
          Carlson TSI: 58
                    Indiana TSI: 33
                                                                           
Blue-Greens (#/L): 7685   Greens (#/L): 19457   Diatoms (#/L): 11966   Other Algae (#/L): 0   Rotifers (#/L):   Zooplankton (#/L): 276
 
 

1995

          
Sample Location: Deep Hole
Sample Date: 1995-07-25
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
1995
14.6
1.1
23
8.5
135.5
8.73
7.05
450
500
453.5
235.5
0.01
0.256
0.049
0.291
27.97
0.701
0.031
0.018
2.185
1.356
4.225
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)
28
27
26.8
26.8
25.2
23.8
21.5
18.5
16.8
15.5
15.2
DO (mg/L)
10.8
10.8
10.8
10.4
6.4
0
0
0
0
0
0
                                                                           
% Water Column Oxic: 67
  
Blue-Green Dominance (% of NU): 96
  
          Carlson TSI: 61
                    Indiana TSI: 42
                                                                           
Blue-Greens (#/L): 34403   Greens (#/L): 892   Diatoms (#/L): 223   Other Algae (#/L): 223   Rotifers (#/L): 0   Zooplankton (#/L): 123
 
 

1999

          
Sample Location: Deep Hole
Sample Date: 1999-07-05
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
1999
14.6
0.5
8
4.59
142
7.5
6.8
448
399
132
182.5
0.01
0.099
0.09
0.163
40.81
1.289
0.778
0.038
1.494
2.072
2.342
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)
28.5
28.5
28.4
28.3
25.7
24.1
21.4
19.6
16.7
15.6
14.5
14.3
14.2
14.1
14.1
DO (mg/L)
10.8
10.9
10.8
10.7
5.8
1.5
0.1
0.1
0.1
0.1
0.1
0.1
0.1
0.1
0.1
                                                                           
% Water Column Oxic: 30
  
Blue-Green Dominance (% of NU): 81
  
          Carlson TSI: 69
                    Indiana TSI: 42
                                                                           
Blue-Greens (#/L): 12898   Greens (#/L): 787   Diatoms (#/L): 0   Other Algae (#/L): 1701   Rotifers (#/L): 533   Zooplankton (#/L): 11.6
 
 

2004

          
Sample Location: Deep Hole
Sample Date: 2004-08-09
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
2004
10.97
0.5
35
10.8
145
9.15
7.45
425.2
498
123
217
0.035
0.051
0.063
0.067
32.55
0.348
0.013
0.046
2.531
1.615
3.987
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)
24.8
24.8
24.8
24.8
24.8
24.8
24.7
22.2
21.3
18.3
16.2
DO (mg/L)
12.22
12
12
12
12
12
11.6
0.04
0.01
0.01
0.01
                                                                           
% Water Column Oxic: 56
  
Blue-Green Dominance (% of NU): 88.2
  
          Carlson TSI: 66
                    Indiana TSI: 39
                                                                           
Blue-Greens (#/L): 15447   Greens (#/L): 950   Diatoms (#/L): 413   Other Algae (#/L): 640   Rotifers (#/L): 41   Zooplankton (#/L): 20.8
 
 

2006

          
Sample Location: Site 1
Sample Date: 2006-07-06
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
2006
13.1
0.5
7
6.2
138.4
9
7.4
450.1
450.3
133
209
0.01
0.069
0.059
0.134
20.93
0.681
0.067
0.018
2.607
1.468
4.602
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)
26.7
26.5
26.1
25.4
24.8
23.7
20.1
17.7
15.8
15.5
15.1
14.9
14.7
14.6
14.4
DO (mg/L)
11.8
11.4
11.3
11.1
7.7
3.6
0
0
0
0
0
0
0
0
0
                                                                           
% Water Column Oxic: 31
  
Blue-Green Dominance (% of NU): 78
  
          Carlson TSI: 64
                    Indiana TSI: 43
                                                                           
Blue-Greens (#/L): 36228   Greens (#/L): 7928   Diatoms (#/L): 1751   Other Algae (#/L): 369   Rotifers (#/L): 92   Zooplankton (#/L): 58.6
 
 

2006

          
Sample Location: Site 2
Sample Date: 2006-07-06
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
2006
12.2
0.5
3
5.6
142
8.9
7.5
453.7
449.2
134
203
0.01
0.037
0.059
0.103
18.9
0.747
0.053
0.036
2.371
1.364
3.323
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)
27.4
27.1
26.2
25.6
25.2
23
21.7
29.5
16.6
15.2
15.1
14.9
14.9
14.8
DO (mg/L)
12.1
11.9
11.5
10.2
8.6
1.5
0
0
0
0
0
0
0
0
                                                                           
% Water Column Oxic: 33.3
  
Blue-Green Dominance (% of NU): 70.9
  
          Carlson TSI: 64
                    Indiana TSI: 43
                                                                           
Blue-Greens (#/L): 33496   Greens (#/L): 11093   Diatoms (#/L): 2066   Other Algae (#/L): 326   Rotifers (#/L): 218   Zooplankton (#/L): 49.2
 
 

2006

          
Sample Location: Site 3
Sample Date: 2006-07-06
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
2006
12.5
0.6
5
5.9
150.9
9.1
7.4
452.9
451.9
129
206
0.01
0.051
0.062
0.112
23.55
0.686
0.056
0.04
2.559
1.557
3.539
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)
27.2
27.1
26.5
25.5
24.5
23.1
21.9
17.4
16.3
15.6
15.1
14.9
14.7
14.7
DO (mg/L)
12.6
12.4
12.1
10
6.4
1.6
0
0
0
0
0
0
0
0
                                                                           
% Water Column Oxic: 33.3
  
Blue-Green Dominance (% of NU): 70.7
  
          Carlson TSI: 64
                    Indiana TSI: 44
                                                                           
Blue-Greens (#/L): 41917   Greens (#/L): 13127   Diatoms (#/L): 3309   Other Algae (#/L): 662   Rotifers (#/L): 221   Zooplankton (#/L): 73.2
 
 

2010

          
Sample Location: Deep Hole
Sample Date: 2010-07-06
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
2010
12.2
0.6
1.5
5.6
152.2
8.9
7.5
402
400
140
209
0.01
0.091
0.059
0.135
30.26
0.194
0.017
0.206
2.178
1.521
2.93
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)
28.1
28.2
28.2
28.2
27.4
27
22.1
19.8
16.7
15.8
15.6
15.3
15.1
14.9
DO (mg/L)
11.8
11.9
11.7
11.6
10
9.6
0.1
0
0
0
0
0
0
0
                                                                           
% Water Column Oxic: 33
  
Blue-Green Dominance (% of NU): 96.8
  
Blue-Green Dominance (% of cells): 91.3
           Carlson TSI: 65
                    Indiana TSI: 64
                                                                           
Blue-Greens (#/L): 6433479   Greens (#/L): 381366   Diatoms (#/L): 182392   Other Algae (#/L): 49743   Rotifers (#/L): 0   Zooplankton (#/L): 4.8
Blue-Greens (cells/L): 145322   Greens (cells/L): 4404   Diatoms (cells/L): 332   Other Algae (cells/L): 50   Rotifers (cells/L): 0   Zooplankton (cells/L): 0
 
 

 

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)