Clean Lakes Program: Pretty - Marshall County

 

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Indiana Clean Lakes Program Lake Report

Pretty

  

Marshall County

1989

          
Sample Location: Deep Hole
Sample Date: 1989-08-14
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
1989
12.2
4.2
61
29
111
9
7.1
220
210
111.5
145
0.01
0.01
0.033
0.086
0.819
0.997
0.037
0.024
1.021
1.058
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
25.1
24.9
24.5
23.3
19.6
15
12.5
11.1
10
9.3
DO (mg/L)
8.9
9.1
9.1
9
8.8
10.6
6
1.4
0.7
0.1
0.1
                                                                           
% Water Column Oxic: 81.8
  
Blue-Green Dominance (% of NU): 67
  
          Carlson TSI: 47
                    Indiana TSI: 20
                                                                           
Blue-Greens (#/L): 207   Greens (#/L): 0   Diatoms (#/L): 90   Other Algae (#/L): 0   Rotifers (#/L): 13   Zooplankton (#/L): 0
 
 

1995

          
Sample Location: Deep Hole
Sample Date: 1995-07-31
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
12.2
3.6
15
16.5
121.1
8.6
7.2
278
216
90
111
0.01
0.01
0.017
0.117
1.29
0.022
0.022
0.037
0.04
0.436
1.249
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)
32
32
31
30.2
28.9
27.8
23.2
18.2
15.3
12.8
11.1
10
9.2
DO (mg/L)
8.6
8.6
9
8.9
9.4
9.8
9.8
9.3
6.2
0.6
0.5
0.1
0.1
                                                                           
% Water Column Oxic: 100
  
Blue-Green Dominance (% of NU): 40
  
          Carlson TSI: 40
                    Indiana TSI: 11
                                                                           
Blue-Greens (#/L): 798   Greens (#/L): 458   Diatoms (#/L): 30   Other Algae (#/L): 74   Rotifers (#/L): 621   Zooplankton (#/L): 16.6
 
 

1999

          
Sample Location: Deep Hole
Sample Date: 1999-07-19
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
1999
12.2
3.2
75
26
117
8.1
7.2
275
220
93
148
0.017
0.017
0.028
0.217
1.34
0.022
0.022
0.018
0.018
0.675
1.095
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
27
27
27
26.5
25
20
16
12
9
7
7
DO (mg/L)
8.9
9.5
9.3
9.2
9.3
10
15.2
10.8
3.1
1
0.5
0.5
                                                                           
% Water Column Oxic: 100
  
Blue-Green Dominance (% of NU): 47
  
          Carlson TSI: 43
                    Indiana TSI: 6
                                                                           
Blue-Greens (#/L): 275   Greens (#/L): 48   Diatoms (#/L): 10   Other Algae (#/L): 212   Rotifers (#/L): 29   Zooplankton (#/L): 6.5
 
 

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
11.28
3.8
55
21
107
8.6
7.2
237
211
85
111
0.04
0.047
0.024
0.044
1.37
0.013
0.013
0.029
0.202
0.289
0.413
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
25.1
25.1
25.1
25.1
25.1
25.1
25.1
20.3
16
13.2
12.1
11.3
DO (mg/L)
8.9
8.8
8.8
8.9
8.8
8.7
8.7
5.9
3.7
0.3
0.1
0
0
                                                                           
% Water Column Oxic: 64
  
Blue-Green Dominance (% of NU): 82
  
          Carlson TSI: 42
                    Indiana TSI: 18
                                                                           
Blue-Greens (#/L): 2564   Greens (#/L): 489   Diatoms (#/L): 24   Other Algae (#/L): 36   Rotifers (#/L): 6   Zooplankton (#/L): 9.1
 
 

2008

          
Sample Location: Deep Hole
Sample Date: 2008-07-21
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
11.4
2.7
20
21.5
107.4
8.2
7.4
242
261
93
105
0.01
0.01
0.043
0.043
1.99
0.013
0.013
0.036
0.018
0.468
0.489
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)
28.5
28.4
28.4
28.4
28.3
27
21.1
16.1
13.2
11
9.3
8.5
DO (mg/L)
8
8.1
8.1
8
8
9.1
10.9
9.7
7.2
5
2.2
1.3
                                                                           
% Water Column Oxic: 100
  
Blue-Green Dominance (% of NU): 78.6
  
          Carlson TSI: 47
                    Indiana TSI: 16
                                                                           
Blue-Greens (#/L): 1197   Greens (#/L): 101   Diatoms (#/L): 109   Other Algae (#/L): 93   Rotifers (#/L): 16   Zooplankton (#/L): 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)