Clean Lakes Program: Downing - Sullivan County

 

Go back to the Indiana Clean Lakes Website

Go back to the Indiana Map to select another county

Indiana Clean Lakes Program Lake Report

Downing

  

Sullivan County

1996

          
Sample Location: Deep Hole
Sample Date: 1996-08-19
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
1996
13.4
6.7
57
27
108.6
8.2
6.48
2680
3820
134.1
603.2
0.01
0.015
0.016
0.117
0.6
0.046
0.046
0.018
0.162
0.23
1.453
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)
28.8
27.7
27.7
27.5
27.3
27.3
27
24.5
22.5
20.1
17.3
DO (mg/L)
8.63
8.7
8.58
8.62
8.79
8.62
8.42
17.9
20
20
0.49
                                                                           
% Water Column Oxic: 100
  
Blue-Green Dominance (% of NU): 5
  
          Carlson TSI: 34
                    Indiana TSI: 7
                                                                           
Blue-Greens (#/L): 75   Greens (#/L): 13   Diatoms (#/L): 13   Other Algae (#/L): 1383   Rotifers (#/L): 38   Zooplankton (#/L): 11
 
 

2001

          
Sample Location: Deep Hole
Sample Date: 2001-07-24
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
2001
13.4
6.1
64
27
64.5
8.25
6.8
2100
3200
120
878
0.011
0.56
0.01
0.331
0.56
0.013
0.021
0.018
7.789
0.511
11.079
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)
31.3
29.5
29.3
29.2
29
28.3
26.3
22.5
19.6
17.9
15.7
12.6
11.3
10.9
10.8
DO (mg/L)
4.8
4.92
4.94
4.93
4.9
4.75
7.02
9.95
7.9
29.35
1.01
0.66
0.57
0.48
0.43
                                                                           
% Water Column Oxic: 69
  
Blue-Green Dominance (% of NU): 24
  
          Carlson TSI: 32
                    Indiana TSI: 17
                                                                           
Blue-Greens (#/L): 246   Greens (#/L): 44   Diatoms (#/L): 71   Other Algae (#/L): 661   Rotifers (#/L): 5   Zooplankton (#/L): 10.1
 
 

2008

          
Sample Location: Deep Hole
Sample Date: 2008-07-28
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
11.5
7.9
33.3
29.5
85.8
8.1
6.7
1600
3500
127
447
0.01
0.013
0.011
0.01
1.52
0.037
0.041
0.018
0.018
0.348
0.972
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)
27.9
27.7
27.7
27.7
27.6
27
22.1
18.1
16.2
15.1
13.7
12.1
11.3
DO (mg/L)
6.3
6.4
6.5
6.1
6.5
6.5
12.5
12.7
19.2
48.2
8.3
4
2.7
                                                                           
% Water Column Oxic: 100
  
Blue-Green Dominance (% of NU): 61.3
  
          Carlson TSI: 35
                    Indiana TSI: 16
                                                                           
Blue-Greens (#/L): 2819   Greens (#/L): 24   Diatoms (#/L): 127   Other Algae (#/L): 1549   Rotifers (#/L): 64   Zooplankton (#/L): 20.4
 
 

2010

          
Sample Location: Deep Hole
Sample Date: 2010-07-13
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
2010
13.1
3.5
35.9
26.2
92.6
8.3
6.9
1656
2845
128
828
0.01
0.595
0.01
0.06
1.04
0.013
0.044
0.145
6.994
0.266
9.296
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)
29.1
28.9
28.8
28.8
28.8
28.2
22.3
18.6
16.6
15.7
14.7
12.2
11.4
11.1
11
DO (mg/L)
7.2
7.1
7.1
7.1
7.1
10.7
16.7
15.2
12.1
20
0.3
0
0
0
0
                                                                           
% Water Column Oxic: 61
  
Blue-Green Dominance (% of NU): 86.9
  
Blue-Green Dominance (% of cells): 48.4
           Carlson TSI: 37
                    Indiana TSI: 37
                                                                           
Blue-Greens (#/L): 134037   Greens (#/L): 99264   Diatoms (#/L): 10116   Other Algae (#/L): 33509   Rotifers (#/L): 0   Zooplankton (#/L): 8.5
Blue-Greens (cells/L): 1224   Greens (cells/L): 141   Diatoms (cells/L): 10   Other Algae (cells/L): 34   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)