Clean Lakes Program: Gilbert - Marshall County

 

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Indiana Clean Lakes Program Lake Report

Gilbert

  

Marshall County

1990

          
Sample Location: Deep Hole
Sample Date: 1990-08-07
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
1990
8.5
0.9
42
14.5
114
9
7
419
460
116.5
289.8
0.01
0.023
0.048
0.051
0.794
5.721
0.018
11.9
1.759
6.03
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)
23.3
22
21.6
21
15.9
11.1
9
8
DO (mg/L)
10
9.6
8.7
5
0.3
0.3
0.3
0.3
                                                                           
% Water Column Oxic: 47
  
Blue-Green Dominance (% of NU): 86
  
          Carlson TSI: 61
                    Indiana TSI: 36
                                                                           
Blue-Greens (#/L): 3034   Greens (#/L): 0   Diatoms (#/L): 168   Other Algae (#/L): 42   Rotifers (#/L): 300   Zooplankton (#/L): 0
 
 

1995

          
Sample Location: Deep Hole
Sample Date: 1995-08-01
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
1995
8.5
0.9
29
11.5
157
9.3
7.25
438
472
100
238
0.01
1.088
0.035
1.34
11.27
0.022
0.022
0.018
7.295
1.041
9.616
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)
31
30.5
30
28.5
25.8
21.6
15
11
9.9
9
DO (mg/L)
11.1
11.8
11.9
10.5
2.6
0.2
0.1
0.1
0.1
0.1
                                                                           
% Water Column Oxic: 50
  
Blue-Green Dominance (% of NU): 87
  
          Carlson TSI: 57
                    Indiana TSI: 42
                                                                           
Blue-Greens (#/L): 4637   Greens (#/L): 458   Diatoms (#/L): 53   Other Algae (#/L): 18   Rotifers (#/L): 176   Zooplankton (#/L): 5.6
 
 

1999

          
Sample Location: Deep Hole
Sample Date: 1999-07-13
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
8.5
1.2
29
12.5
128
9.3
7.3
390
405
104
210
0.01
0.495
0.089
0.922
12.9
0.022
0.022
0.019
2
1.325
7.085
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)
25.1
24.7
24
23.6
22.2
16
11.1
8.8
7.5
7
DO (mg/L)
10.43
10.8
10.78
9.31
4.8
0.3
0.1
0.1
0.1
0.1
                                                                           
% Water Column Oxic: 47
  
Blue-Green Dominance (% of NU): 41
  
          Carlson TSI: 61
                    Indiana TSI: 31
                                                                           
Blue-Greens (#/L): 228   Greens (#/L): 25   Diatoms (#/L): 126   Other Algae (#/L): 34   Rotifers (#/L): 135   Zooplankton (#/L): 4.4
 
 

2004

          
Sample Location: Deep Hole
Sample Date: 2004-08-10
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
7.9
0.9
27
9.6
122
9
7.2
418
441
110
259
0.028
0.46
0.045
0.616
13.75
0.013
0.013
0.029
7.388
1.028
8.888
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)
24.7
24.7
24.7
24.7
24.7
22.4
17.5
14.6
11.2
8.8
DO (mg/L)
10.3
10.1
10.1
10.1
9.9
0.03
0
0
0
0
                                                                           
% Water Column Oxic: 38
  
Blue-Green Dominance (% of NU): 55.7
  
          Carlson TSI: 59
                    Indiana TSI: 40
                                                                           
Blue-Greens (#/L): 757   Greens (#/L): 510   Diatoms (#/L): 0   Other Algae (#/L): 66   Rotifers (#/L): 22   Zooplankton (#/L): 5.9
 
 

2012

          
Sample Location: Deep Hole
Sample Date: 2012-07-19
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
2012
8.54
0.7
9.76
9.84
39.3
8.9
7.5
364
372
122
232
0.01
0.157
0.047
0.232
24.97
0.02
0.023
0.018
4.432
1.28
6.01
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
26.2
22.2
14.9
12.6
11.6
11
DO (mg/L)
2.97
3.08
3.04
3.05
2.06
0.11
0.04
0.04
0.03
0.03
                                                                           
% Water Column Oxic: 37.5
  
Blue-Green Dominance (% of NU): 98.2
  
Blue-Green Dominance (% of cells): 94.4
           Carlson TSI: 67
                   
                                                                           
Blue-Greens (#/L): 57730005   Greens (#/L): 3305868   Diatoms (#/L): 57744   Other Algae (#/L): 28872   Rotifers (#/L): 897   Zooplankton (#/L): 523
Blue-Greens (cells/L): 527596   Greens (cells/L): 9528   Diatoms (cells/L): 58   Other Algae (cells/L): 29   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)