Secchi Depth (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

Secchi Depth

 

Meters

SE

 

Year

 

 

Principal

Investigator

Sampling

Period

 

Number

of

lake sampling

sites

 

Total

number

of

samples

collected

Avg

Secchi Depth

 

Meters

SE

1971

Bachmann

6/14 to

8/30

6

35

2.5

0.1

1971

Bachmann

6/23 to

8/30

5

31

0.9

0.1

1972

Bachmann

6/12 to

8/24

6

25

2.9

0.1

1972

Bachmann

6/1 to

8/24

5

25

1.0

0.1

1973

Bachmann

6/7 to

8/20

6

15

3.9

0.4

1973

Bachmann

6/21 to

8/20

5

39

0.8

0.1

1979

Bachmann

Jun to

Oct

1

7

2.9

0.2

1979

Bachmann

Jun to

Oct

1

6

0.7

0.1

1987

Bachmann

6/2 to

8/13

6

66

4.1

0.1

NA

 

NA

NA

NA

NA

NA

1988

Bachmann

6/6 to

8/8

6

51

4.9

0.2

NA

NA

NA

NA

NA

NA

1989

Bachmann

6/4 to

8/6

6

51

4.7

0.1

NA

NA

NA

NA

NA

NA

1990

Bachmann

5/27 to

7/29

1

3

4.8

0.2

1990

Bachmann

5/27 to

7/29

1

3

2.1

0.5

1993

Lang

6/5 to

8/20

3

36

4.9

0.3

NA

NA

NA

NA

NA

NA

1994

Lang

6/26 to

8/30

3

36

2.1

0.1

NA

NA

NA

NA

NA

NA

1995

Lang

6/4 to

8/6

3

30

5.5

0.5

NA

NA

NA

NA

NA

NA

1997

Lang

6/21 to

8/3

3

24

5.0

0.2

NA

NA

NA

NA

NA

NA

1998

Lang

7/2 to

8/28

3

54

2.7

0.1

NA

NA

NA

NA

NA

NA

1999

CLAMP

6/17 to

8/31

6

36

3.1

0.1

1999

CLAMP

6/17 to

8/31

5

30

0.9

0.1

2000

CLAMP

6/7 to

8/31

6

42

 

3.3

0.1

2000

CLAMP

6/2 to

8/20

5

40

0.8

0.1

2001

CLAMP

6/14 to

8/22

6

36

 

3.3

0.2

2001

CLAMP

6/10 to

8/22

5

30

0.7

0.1

2002

CLAMP

6/5 to

8/26

6

42

 

4.1

0.2

2002

CLAMP

6/5 to

8/28

5

35

0.7

0.1

2003

CLAMP

6/11 to

8/20

6

35

 

4.6

0.3

2003

CLAMP

6/8 to

8/21

5

30

0.8

0.1

 

                Big Spirit Lake

                Upper Gar Lake

Year

 

 

Principal

Investigator  

   

 

Sampling

Period

 

 

 

Number

of

lake sampling

sites

 

 

Total

number

of

samples

collected

Avg

Secchi Depth

 

meters

SE

 

Year

 

Principal

Investigator

Sampling

Period

 

Number

of

lake sampling

sites

 

Total

number

of

samples

collected

Avg

Secchi Depth

 

meters

SE

1971

Bachmann

7/29 to

8/26

5

15

1.5

0.2

1971

Bachmann

7/15 to

8/22

1

5

0.7

0.2

1972

Bachmann

6/5 to

8/23

5

25

2.2

0.1

1972

Bachmann

6/1 to 8/25

1

5

0.7

0.2

1973

Bachmann

7/18 to

8/30

5

25

1.7

0.1

1973

Bachmann

6/21 to

8/15

1

5

0.6

0.1

1979

Bachmann

Jun to

Oct

1

6

1.0

0.1

1979

Bachmann

Jun to

Oct

1

5

0.5

0.1

1990

Bachmann

5/26 to

7/28

1

3

3.3

0.9

1990

Bachmann

5/27 to

7/29

1

3

1.1

0.3

1999

CLAMP

 

6/18 to

8/20

5

25

1.6

0.1

1999

CLAMP

 

6/17 to

8/24

1

5

0.9

0.1

2000

CLAMP

6/7 to

8/31

5

35

1.7

0.1

2000

CLAMP

6/2 to

8/25

1

7

0.6

0.1

 

2001

CLAMP

6/8 to

8/20

5

30

2.1

0.2

2001

CLAMP

6/8 to

8/22

1

6

0.9

0.1

 

2002

CLAMP

6/7 to

8/26

5

35

1.9

0.1

2002

CLAMP

6/5 to

8/28

1

7

0.6

0.1

 

2003

CLAMP

6/5 to

8/19

5

29

1.6

0.1

2003

CLAMP

6/12 to

8/30

1

6

1.0

0.2

 

 

              Lake Minnewashta

                Lower Gar Lake

Year

 

 

Principal

Investigator  

   

 

Sampling

Period

 

 

 

Number

of

lake sampling

sites

 

 

Total

number

of

samples

collected

Avg

Secchi Depth

 

meters

SE

 

Year

 

 

Principal

Investigator  

   

 

Sampling

Period

 

Number

of

lake sampling

sites

 

Total

number

of

samples

collected

Avg

Secchi Depth

 

meters

SE

1971

Bachmann

7/15 to

8/22

1

 

5

0.7

0.1

1971

Bachmann

7/15 to

8/22

1

5

0.4

0.0

1972

Bachmann

6/1 to

8/25

1

4

1.3

0.6

1972

Bachmann

6/1 to

8/25

1

5

0.4

0.1

1973

Bachmann

6/21 to

8/15

1

5

0.8

0.3

1973

Bachmann

6/21 to

8/15

1

5

0.5

0.1

1979

Bachmann

Jun to

Oct

1

6

0.7

0.1

 

1979

Bachmann

Jun to

Oct

1

6

0.3

0.1

1990

Bachmann

5/27 to

7/29

1

3

1.6

0.2

 

1990

Bachmann

5/27 to

7/29

1

3

0.5

0.1

1999

CLAMP

 

7/14 to

8/24

1

4

1.3

0.2

1999

CLAMP

 

7/14 to

8/24

1

4

0.4

0.1

2000

CLAMP

6/2 to

8/25

1

7

1.3

0.2

2000

CLAMP

6/2 to

8/25

1

7

0.4

0.1

2001

CLAMP

6/8 to

8/22

1

6

1.1

0.3

2001

CLAMP

6/8 to

8/22

1

6

0.6

0.3

2002

CLAMP

6/5 to

8/28

1

7

0.8

0.2

2002

CLAMP

6/5 to

8/28

1

7

0.4

0.1

2003

CLAMP

6/12 to

8/30

1

6

1.0

0.2

2003

CLAMP

6/12 to

8/30

1

6

0.3

0.0

 

              Little Spirit Lake

                Center Lake

Year

 

 

Principal

Investigator  

   

 

Sampling

Period

 

 

 

Number

of

lake sampling

sites

 

 

Total

number

of

samples

collected

Avg

Secchi Depth

 

meters

SE

 

Year

 

 

Principal

Investigator  

   

 

Sampling

Period

 

Number

of

lake sampling

sites

 

Total

number

of

samples

collected

Avg

Secchi Depth

 

meters

SE

1971

Bachmann

7/16 to

7/22

2

2

0.6

0.1

NA

NA

NA

NA

NA

NA

1972

Bachmann

7/16 to

8/25

2

3

0.4

0.1

NA

NA

NA

NA

NA

NA

1979

Bachmann

Jun to

Oct

1

6

0.7

0.0

 

1979

Bachmann

Jun to

Oct

1

6

0.4

0.0

1990

Bachmann

May to

Aug

1

3

0.3

0.0

 

1990

Bachmann

5/26 to

7/28

1

3

0.8

0.1

NANA

NNAA

NNAA

NNAA

NNAA

NA

1999

CLAMP

 

7/18 to

8/29

2

7

1.0

0.2

2000

CLAMP

6/24 to

8/19

2

10

0.3

0.0

2000

CLAMP

6/11 to

8/27

2

8

1.4

0.2

2001

CLAMP

6/9 to

8/11

2

10

0.4

0.1

2001

CLAMP

7/8 to

8/25

2

8

1.2

0.2

2002

CLAMP

6/5 to

8/23

2

14

0.6

0.1

2002

CLAMP

6/9 to

8/19

2

12

0.8

0.1

2003

CLAMP

6/11 to

8/18

2

12

0.5

0.1

2003

CLAMP

6/15 to

8/31

2

12

1.3

0.2

 

              Silver Lake

 

Year

 

 

Principal

Investigator  

   

 

Sampling

Period

 

 

 

Number

of

lake sampling

sites

 

 

Total

number

of

samples

collected

Avg

Secchi Depth

 

meters

SE

 

 

 

 

 

 

 

1979

Bachmann

Jun to

Oct

1

6

1.1

0.3

 

 

 

 

 

 

1990

Bachmann

5/26 to

7/28

1

3

0.4

0.1

 

 

 

 

 

 

1999

CLAMP

 

6/9 to

8/26

4

18

0.9

0.1

 

 

 

 

 

 

2000

CLAMP

6/6 to

8/22

4

23

0.8

0.1

 

 

 

 

 

 

2001

CLAMP

6/5 to

8/28

4

28

0.6

0.0

 

 

 

 

 

 

2002

CLAMP

6/11 to

8/20

4

24

0.5

0.0

 

 

 

 

 

 

2003

CLAMP

6/10 to

8/19

4

24

0.6

0.0

 

 

 

 

 

 

 

              Elk Lake

                Trumbull Lake

Year

 

 

Principal

Investigator  

   

 

Sampling

Period

 

 

 

Number

of

lake sampling

sites

 

 

Total

number

of

samples

collected

Avg

Secchi Depth

 

meters

SE

 

Year

 

 

Principal

Investigator  

   

 

Sampling

Period

 

Number

of

lake sampling

sites

 

Total

number

of

samples

collected

Avg

Secchi Depth

 

meters

SE

NA

NA

NA

NA

NA

NA

1979

Bachmann

Jun to

Oct

1

6

0.3

0.1

NA

NA

NA

NA

NA

NA

1990

Bachmann

May to

Aug

1

3

0.2

0.1

2000

CLAMP

6/20 to

8/16

1

3

0.1

0.0

2000

CLAMP

6/20 to

8/16

1

3

0.1

0.0

2001

CLAMP

6/13 to

8/16

1

3

0.5

0.3

2001

CLAMP

6/13 to

8/16

1

3

0.3

0.1

2002

CLAMP

7/22 to

8/26

1

2

0.2

0.0

2002

CLAMP

7/22 to

8/26

1

2

0.1

0.0