Clean Lakes Program: Rock - Kosciusko County

 

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Indiana Clean Lakes Program Lake Report

Rock

  

Kosciusko County

1991

          
Sample Location: Deep Hole
Sample Date: 1991-08-26
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
1991
4.9
0.5
5
4.5
82
8.5
7.2
440
410
188
190
0.01
0.01
0.088
0.177
0.97
0.873
0.038
0.132
0.284
2.825
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
25
24
24
23
22
DO (mg/L)
12.2
9.4
6.9
4.4
0.2
0.1
                                                                           
% Water Column Oxic: 75
  
Blue-Green Dominance (% of NU): 28
  
          Carlson TSI: 70
                    Indiana TSI: 30
                                                                           
Blue-Greens (#/L): 25765   Greens (#/L): 64216   Diatoms (#/L): 856   Other Algae (#/L): 514   Rotifers (#/L):   Zooplankton (#/L): 377
 
 

1998

          
Sample Location: Deep Hole
Sample Date: 1998-08-10
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
1998
4.9
0.6
4
3.75
131
8.08
7.02
361.1
379.7
145
180
0.011
0.423
0.109
0.527
53.2
0.026
0.029
2.137
4.465
2.075
4.544
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
27.3
27.2
24.7
23
DO (mg/L)
11.35
10.47
10.23
1.65
0.01
                                                                           
% Water Column Oxic: 66
  
Blue-Green Dominance (% of NU): 49
  
          Carlson TSI: 70
                    Indiana TSI: 29
                                                                           
Blue-Greens (#/L): 10147   Greens (#/L): 4388   Diatoms (#/L): 1234   Other Algae (#/L): 3908   Rotifers (#/L): 1097   Zooplankton (#/L): 40.6
 
 

2008

          
Sample Location: Deep Hole
Sample Date: 2008-06-24
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
4.9
0.6
1.6
3.4
74.9
8.3
7.8
379
380
184
183
0.01
0.01
0.125
0.148
57.83
0.02
0.016
0.032
0.269
2.616
2.481
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)
25.3
23.4
23.3
23.1
22.6
DO (mg/L)
8.7
6.9
6.3
4.2
0.7
                                                                           
% Water Column Oxic: 98.6
  
Blue-Green Dominance (% of NU): 19.8
  
          Carlson TSI: 70
                    Indiana TSI: 27
                                                                           
Blue-Greens (#/L): 15032   Greens (#/L): 45963   Diatoms (#/L): 1944   Other Algae (#/L): 12532   Rotifers (#/L): 417   Zooplankton (#/L): 1.5
 
 

 

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)