Clean Lakes Program: Benefiel - Sullivan County

 

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Indiana Clean Lakes Program Lake Report

Benefiel

  

Sullivan County

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
10.7
8
64
29.5
97.7
7.74
6.72
2280
3500
91.1
715.6
0.01
0.012
0.01
0.101
0.47
0.046
0.046
0.018
5.208
0.239
5.713
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)
27.5
27.5
27.3
27.3
27.2
27.05
25.3
22
19.9
18.4
16.4
DO (mg/L)
7.43
7.88
7.79
7.65
7.6
7.82
13.95
9.97
18.8
20
20
                                                                           
% Water Column Oxic: 100
  
Blue-Green Dominance (% of NU): 11
  
          Carlson TSI: 30
                    Indiana TSI: 10
                                                                           
Blue-Greens (#/L): 663   Greens (#/L): 0   Diatoms (#/L): 0   Other Algae (#/L): 5405   Rotifers (#/L): 0   Zooplankton (#/L): 0
 
 

2001

          
Sample Location: Deep Hole
Sample Date: 2001-07-09
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
2001
10.7
6.6
51
28
101.7
8.2
6.9
2001
3570
78
551
0.01
0.01
0.026
0.161
0.47
0.013
0.013
0.062
0.083
0.311
2.655
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)
29.4
28.7
28
27.6
27.1
26.7
24.2
20.8
18.5
17.8
16.4
12.5
DO (mg/L)
8.1
7.9
7.9
7.9
8.2
8
12.2
13.7
16.8
20
2
1.2
                                                                           
% Water Column Oxic: 81
  
Blue-Green Dominance (% of NU): 74
  
          Carlson TSI: 36
                    Indiana TSI: 18
                                                                           
Blue-Greens (#/L): 1599   Greens (#/L): 14   Diatoms (#/L): 14   Other Algae (#/L): 533   Rotifers (#/L): 7   Zooplankton (#/L): 8.7
 
 

2008

          
Sample Location: Deep Hole
Sample Date: 2008-08-04
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
2008
10.06
5.4
13.51
24.93
126
8
6.9
164
321
98
464
0.01
0.01
0.01
0.01
0.98
0.013
0.061
0.018
0.423
0.378
1.132
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)
29.34
28.84
28.89
28.78
28.6
24.8
20.4
17
15.5
14.6
12.6
11.3
DO (mg/L)
9.98
9.84
9.54
9.27
8.87
16.22
18.71
17.4
17.13
17.65
13.37
11.31
                                                                           
% Water Column Oxic: 100
  
Blue-Green Dominance (% of NU): 41.2
  
          Carlson TSI: 34
                    Indiana TSI: 7
                                                                           
Blue-Greens (#/L): 145   Greens (#/L): 19   Diatoms (#/L): 46   Other Algae (#/L): 130   Rotifers (#/L): 4   Zooplankton (#/L): 8.7
 
 

 

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)