chlorophyll a (Summer average, June - August)

              West Okoboji Lake

             East Okoboji Lake

Year

 

 

Principal

Investigator  

   

 

Sampling

Period

 

 

 

Number

of

lake sampling

sites

 

 

Total

number

of

samples

collected

Avg

chl a

 

(mg/m3)

SE

 

Year

 

 

Principal

Investigator

   

 

Sampling

Period

 

Number

of

lake sampling

sites

 

Total

number

of

samples

collected

Avg

chl a

 

(mg/m3)

SE

1971

Bachmann

6/28 to

8/19

6

31

5.0

0.3

1971

Bachmann

7/8 to

8/20

5

49

190.4

17.6

1972

Bachmann

6/12 to

8/26

6

48

3.9

0.3

1972

Bachmann

6/1 to

8/24

5

59

124.8

15.1

1973

Bachmann

6/3 to

8/25

6

58

3.4

0.2

1973

Bachmann

6/6 to

8/25

5

51

67.8

11.1

1979

Bachmann

Jun to

Oct

1

14

6.3

1.0

1979

Bachmann

Jun to

Oct

1

9

25.8

8.3

1987

Bachmann

6/2 to

8/13

6

66

3.5

0.2

NA

NA

NA

NA

NA

NA

1988

Bachmann

6/6 to

8/8

6

57

3.8

0.2

NA

NA

NA

NA

NA

NA

1989

Bachmann

6/4 to

8/6

6

60

3.2

0.2

NA

NA

NA

NA

NA

NA

1990

Bachmann

5/27 to

7/29

1

9

9.9

4.1

1990

Bachmann

5/27 to

7/29

1

9

35.7

9.4

1993

Lang

6/5 to

8/20

3

18

6.8

1.2

NA

NA

NA

NA

NA

NA

1994

Lang

6/26 to

8/30

3

18

6.9

0.6

NA

NA

NA

NA

NA

NA

1995

Lang

6/4 to

8/6

3

15

3.4

0.7

NA

NA

NA

NA

NA

NA

1997

Lang

6/21 to

8/3

3

12

2.1

0.2

NA

NA

NA

NA

NA

NA

1998

Lang

7/2 to

8/28

3

27

4.8

0.7

NA

NA

NA

NA

NA

NA

1999

CLAMP

6/17 to

8/25

6

33

5.0

0.3

1999

CLAMP

6/17 to

8/31

5

30

66.3

12.0

2000

CLAMP

6/7 to

8/31

6

42

4.1

0.2

2000

CLAMP

6/2 to

8/20

5

35

64.0

9.7

2001

CLAMP

6/14 to

8/22

6

36

6.3

0.5

2001

CLAMP

6/10 to

8/22

5

30

52.9

7.5

2002

CLAMP

6/5 to

8/26

6

36

3.8

0.4

2002

CLAMP

6/5 to

8/28

5

35

37.6

3.8

2003

CLAMP

6/11 to

8/20

6

36

3.3

0.3

2003

CLAMP

6/19 to

8/21

5

25

47.5

11.6

 

                  Big Spirit Lake

                  Upper Gar Lake

Year

 

 

Principal

Investigator  

   

 

Sampling

Period

 

 

 

Number

of

lake sampling

sites

 

 

Total

number

of

samples

collected

Avg

chl a

 

(mg/m3)

SE

 

Year

 

 

Principal

Investigator

   

 

Sampling

Period

 

Number

of

lake sampling

sites

 

Total

number

of

samples

collected

Avg

chl a

 

(mg/m3)

SE

1971

Bachmann

7/29 to

8/26

5

15

63.1

12.1

1971

Bachmann

7/8 to

8/23

1

11

126.3

21.8

1972

Bachmann

6/5 to

8/23

5

39

7.8

0.8

1972

Bachmann

6/1 to

8/25

1

10

81.5

32.8

1973

Bachmann

6/6 to

8/30

5

50

10.7

0. 9

1973

Bachmann

6/6 to

8/15

1

8

47.5

17.0

1979

Bachmann

Jun to

Oct

1

9

46.2

5.2

1979

Bachmann

Jun to

Oct

1

9

89.5

27.2

1990

Bachmann

5/26 to

7/28

1

9

15.6

2.7

1990

Bachmann

5/27 to

7/29

1

9

136.9

25.0

1999

CLAMP

6/18 to

8/6

5

20

11.8

0.9

1999

CLAMP

6/17 to

8/11

1

3

17.3

5.1

2000

CLAMP

6/7 to

8/31

5

35

18.6

3.7

2000

CLAMP

6/2 to

8/25

1

6

58.2

10.6

2001

CLAMP

6/8 to

8/20

5

29

15.0

2.1

2001

CLAMP

6/8 to

8/22

1

6

38.9

11.1

2002

CLAMP

6/7 to

8/28

5

35

21.6

2.3

2002

CLAMP

6/5 to

8/28

1

7

42.3

7.3

2003

CLAMP

6/5 to

8/19

5

29

40.3

4.4

2003

CLAMP

6/28 to

8/30

1

5

59.7

16.5

 

              Lake Minnewashta

                  Lower Gar Lake

Year

 

 

Principal

Investigator  

   

 

Sampling

Period

 

 

 

Number

of

lake sampling

sites

 

 

Total

number

of

samples

collected

Avg

chl a

 

(mg/m3)

SE

 

Year

 

 

Principal

Investigator

   

 

Sampling

Period

 

Number

of

lake sampling

sites

 

Total

number

of

samples

collected

Avg

chl a

 

(mg/m3)

SE

1971

Bachmann

7/8 to

8/23

1

11

185.1

21.0

1971

Bachmann

7/15 to

8/23

1

9

329.5

33.8

1972

Bachmann

6/1 to

8/25

1

10

83.9

22.1

1972

Bachmann

6/1 to

8/25

1

10

127.5

29.4

1973

Bachmann

6/6 to

8/15

1

7

93.3

45.4

1973

Bachmann

6/6 to

8/15

1

7

138.8

61.4

1979

Bachmann

Jun to

Oct

1

9

29.6

11.1

1979

Bachmann

Jun to

Oct

1

9

72.6

7.2

1990

Bachmann

5/27 to

7/29

1

9

35.5

7.9

1990

Bachmann

5/27 to

7/29

1

9

33.0

8.5

1999

CLAMP

7/28 to

8/11

1

2

17.3

12.7

1999

CLAMP

7/28 to

8/11

1

2

53.4

4.5

2000

CLAMP

6/2 to

8/25

1

6

34.0

11.3

2000

CLAMP

6/2 to

8/25

1

6

40.3

9.9

2001

CLAMP

6/8 to

8/22

1

6

46.4

12.0

2001

CLAMP

6/8 to

8/22

1

6

47.3

15.1

2002

CLAMP

6/5 to

8/28

1

7

64.9

19.3

2002

CLAMP

6/5 to

8/28

1

7

63.6

21.3

2003

CLAMP

6/28 to

8/30

1

5

67.8

22.9

2003

CLAMP

 

*******

 

*******

 

*******

 

 

****

 

              Little Spirit Lake

                  Center Lake

Year

 

 

Principal

Investigator  

   

 

Sampling

Period

 

 

 

Number

of

lake sampling

sites

 

 

Total

number

of

samples

collected

Avg

chl a

 

(mg/m3)

SE

 

Year

 

 

Principal

Investigator

   

 

Sampling

Period

 

Number

of

lake sampling

sites

 

Total

number

of

samples

collected

Avg

chl a

 

(mg/m3)

SE

1979

Bachmann

Jun to

Oct

1

9

42.8

5.6

1979

Bachmann

Jun to

Oct

1

6

90.3

9.2

1990

Bachmann

May to

Aug

1

9

62.7

3.3

1990

Bachmann

5/26 to

7/28

1

9

33.0

4.2

NA

 

NA

NA

NA

NA

NA

1999

CLAMP

7/18 to

8/29

2

7

93.7

33.4

2000

CLAMP

6/24 to

8/19

2

10

125.9

19.4

2000

CLAMP

6/11 to

8/27

2

8

78.6

43.4

2001

CLAMP

6/9to

8/11

2

10

137.8

18.6

2001

CLAMP

7/8 to

8/25

2

6

97.9

37.6

2002

CLAMP

 

*******

 

 

*******

 

*******

 

 

****

2002

CLAMP

 

*******

 

*******

 

*******

 

 

****

2003

CLAMP

6/11to

8/18

2

12

182.8

47.7

2003

CLAMP

6/15 to

8/31

2

12

77.1

15.1

 

              Silver Lake

 

Year

 

 

Principal

Investigator  

   

 

Sampling

Period

 

 

 

Number

of

lake sampling

sites

 

 

Total

number

of

samples

collected

Avg

chl a

 

(mg/m3)

SE

 

 

 

 

 

 

 

1979

Bachmann

Jun to

Oct

1

10

34.1

13.4

 

 

 

 

 

 

1990

Bachmann

5/26 to

7/28

1

9

36.2

3.0

 

 

 

 

 

 

1999

CLAMP

7/30 to

8/12

4

8

45.9

8.5

 

 

 

 

 

 

2000

CLAMP

6/6 to

8/22

4

23

60.0

15.4

 

 

 

 

 

 

2001

CLAMP

6/5 to

8/28

4

26

71.2

26.3

 

 

 

 

 

 

2002

CLAMP

6/11 to

8/20

4

24

53.2

10.7

 

 

 

 

 

 

2003

CLAMP

6/10 to

8/19

4

24

75.5

18.1

 

 

 

 

 

 

 

              Elk Lake

                  Trumbull Lake

Year

 

 

Principal

Investigator  

   

 

Sampling

Period

 

 

 

Number

of

lake sampling

sites

 

 

Total

number

of

samples

collected

Avg

chl a

 

(mg/m3)

SE

 

Year

 

 

Principal

Investigator

   

 

Sampling

Period

 

Number

of

lake sampling

sites

 

Total

number

of

samples

collected

Avg

chl a

 

(mg/m3)

SE

NA

NA

NA

NA

NA

NA

1979

Bachmann

Jun to

Oct

1

11

131.3

16.2

NA

NA

NA

NA

NA

NA

1990

Bachmann

May to

Aug

1

9

189.2

13.5

2000

CLAMP

6/20 to

8/16

1

3

201.1

31.8

2000

CLAMP

6/20 to

8/16

1

3

233.1

60.3

2001

CLAMP

6/13 to

8/16

1

3

167.8

68.8

2001

CLAMP

6/13 to

8/16

1

3

151.1

112.1

2002

CLAMP

7/22 to

8/20

1

2

249.1

9.5

2002

CLAMP

7/22 to

8/20

1

2

191.1

91.8

 

*******      Insufficient Number Of Samples To Calculate A Reliable Summer Average