Clean Lakes Program: Strahl - Brown County

 

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Indiana Clean Lakes Program Lake Report

Strahl

  

Brown County

1992

          
Sample Location: Deep Hole
Sample Date: 1992-08-05
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
1992
4.9
2.7
40
6.2
94.91
6.8
6.4
111
110
22
23
0.01
0.01
0.117
0.122
0.019
0.018
0.365
0.397
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)
26.5
24.5
24
23.2
21
16.5
DO (mg/L)
7.8
7.8
7.8
9
8.4
1
                                                                           
% Water Column Oxic: 100
  
Blue-Green Dominance (% of NU): 68
  
          Carlson TSI: 46
                    Indiana TSI: 0
                                                                           
Blue-Greens (#/L): 5519   Greens (#/L): 34   Diatoms (#/L): 169   Other Algae (#/L): 2370   Rotifers (#/L): 53   Zooplankton (#/L): 0
 
 

1996

          
Sample Location: Deep Hole
Sample Date: 1996-08-20
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
1996
4.9
1.8
17.6
11.5
78.5
7.23
6.55
22.7
32.4
0.01
0.01
0.022
0.029
0.55
0.046
0.046
0.018
0.018
0.505
0.426
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
28.9
28
27
21
15.2
12.5
DO (mg/L)
6.65
6.45
6.15
5.75
3.2
0.65
0.55
                                                                           
% Water Column Oxic: 100
  
Blue-Green Dominance (% of NU): 42
  
          Carlson TSI: 42
                    Indiana TSI: 14
                                                                           
Blue-Greens (#/L): 37484   Greens (#/L): 91   Diatoms (#/L): 2405   Other Algae (#/L): 48648   Rotifers (#/L): 45   Zooplankton (#/L): 24
 
 

2001

          
Sample Location: Deep Hole
Sample Date: 2001-07-18
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
2001
4.9
2.2
19
10
88.5
7.2
6.5
110
99
19
19
0.01
0.01
0.016
0.023
5.77
0.013
0.013
0.018
0.018
0.596
0.459
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)
27.8
27.4
26.5
25.4
20.8
15.5
DO (mg/L)
6.8
7.1
7.1
7.4
1
0.3
                                                                           
% Water Column Oxic: 75
  
Blue-Green Dominance (% of NU): 82
  
          Carlson TSI: 47
                    Indiana TSI: 20
                                                                           
Blue-Greens (#/L): 21957   Greens (#/L): 0   Diatoms (#/L): 78   Other Algae (#/L): 4548   Rotifers (#/L): 39   Zooplankton (#/L): 68.7
 
 

 

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)