Clean Lakes Program: Flat - Marshall County

 

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Indiana Clean Lakes Program Lake Report

Flat

  

Marshall County

1990

          
Sample Location: Deep Hole
Sample Date: 1990-08-08
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
6.7
1
35
71
7.8
7.4
365
395
173.7
231.1
0.01
0.753
0.048
0.768
0.427
0.433
0.018
2.83
0.23
0.23
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)
20.5
19.5
18.3
14
10.3
8.6
DO (mg/L)
8.3
4.8
0.9
0.3
0.3
0.3
                                                                           
% Water Column Oxic: 50
  
Blue-Green Dominance (% of NU): 35
  
          Carlson TSI: 60
                    Indiana TSI: 28
                                                                           
Blue-Greens (#/L): 7247   Greens (#/L): 2222   Diatoms (#/L): 8035   Other Algae (#/L): 2243   Rotifers (#/L): 691   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
6.7
1.4
14
7.5
87.7
8.2
7.4
422
371
167
209.5
0.01
0.253
0.052
0.307
12.26
0.022
0.022
0.018
1.443
0.808
2.188
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)
30.8
29.8
28.6
26.8
24.3
17.8
14.4
12.4
DO (mg/L)
9.6
9
6.8
3.1
1.1
0.1
0.1
0.1
                                                                           
% Water Column Oxic: 100
  
Blue-Green Dominance (% of NU): 20
  
          Carlson TSI: 57
                    Indiana TSI: 31
                                                                           
Blue-Greens (#/L): 15338   Greens (#/L): 1212   Diatoms (#/L): 51231   Other Algae (#/L): 8064   Rotifers (#/L): 896   Zooplankton (#/L): 157.2
 
 

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
6.7
1
22
8
88
8
7
420
360
181
208
0.013
0.183
0.102
0.311
20.16
0.022
0.022
0.018
1.784
1.131
2.765
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
24
22
21.5
20
13
10
DO (mg/L)
10.9
10.1
7.7
5.5
0
0
0
                                                                           
% Water Column Oxic: 31
  
Blue-Green Dominance (% of NU): 12
  
          Carlson TSI: 64
                    Indiana TSI: 28
                                                                           
Blue-Greens (#/L): 769   Greens (#/L): 591   Diatoms (#/L): 2986   Other Algae (#/L): 2188   Rotifers (#/L): 148   Zooplankton (#/L): 28.3
 
 

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
6.1
0.7
26
12
64.7
8.1
7.5
476.3
461
203
257
0.076
0.633
0.091
0.97
20.69
0.013
0.013
0.018
2.894
1.073
4.161
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
23.8
23.7
23.6
22.8
20.2
16.5
DO (mg/L)
5.66
5.14
5.65
5.75
3.15
0.03
0.01
                                                                           
% Water Column Oxic: 60
  
Blue-Green Dominance (% of NU): 18.4
  
          Carlson TSI: 65
                    Indiana TSI: 27
                                                                           
Blue-Greens (#/L): 192   Greens (#/L): 516   Diatoms (#/L): 258   Other Algae (#/L): 54   Rotifers (#/L): 18   Zooplankton (#/L): 3.4
 
 

2012

          
Sample Location: Deep Hole
Sample Date: 2012-07-26
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
6.4
0.9
5.75
6.56
92.5
7.9
7.2
461
559
213
252
0.01
0.256
0.066
0.284
37.89
0.022
0.029
0.033
1.155
1.07
1.94
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)
24.89
27.75
27.68
27.45
27.06
24.16
19.18
16.88
DO (mg/L)
24.89
8.47
7.8
3.64
3.19
1.88
1.01
0.7
                                                                           
% Water Column Oxic: 83.3
  
Blue-Green Dominance (% of NU): 85.9
  
Blue-Green Dominance (% of cells): 46.6
           Carlson TSI: 69
                   
                                                                           
Blue-Greens (#/L): 4354490   Greens (#/L): 3053561   Diatoms (#/L): 1806843   Other Algae (#/L): 126479   Rotifers (#/L): 69   Zooplankton (#/L): 111
Blue-Greens (cells/L): 121112   Greens (cells/L): 17688   Diatoms (cells/L): 1807   Other Algae (cells/L): 379   Rotifers (cells/L): 0   Zooplankton (cells/L): 0
 
 

2014

          
Sample Location: Deep Hole
Sample Date: 2014-08-04
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
2014
6.1
1.68
22.89
9.51
8
7.6
465
492
199
204
0.01
0.015
0.046
0.0865
17.8
0.013
0.013
0.018
0.018
0.909
0.89
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
25.4
23.3
22.3
21.7
17
14
DO (mg/L)
7.34
8.09
4.82
1.16
0.1
0.04
0.04
                                                                           
% Water Column Oxic:
 
Blue-Green Dominance (% of NU): 54.2
  
Blue-Green Dominance (% of cells): 8.8
           Carlson TSI: 59
                   
                                                                           
Blue-Greens (#/L): 14019   Greens (#/L): 24701   Diatoms (#/L): 1336   Other Algae (#/L): 118827   Rotifers (#/L): 703   Zooplankton (#/L): 89
Blue-Greens (cells/L): 176   Greens (cells/L): 25   Diatoms (cells/L): 5   Other Algae (cells/L): 119   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)