PowerPoint - Wildlands School

coriandercultureMechanics

Feb 22, 2014 (3 years and 8 months ago)

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Coring

Porosity

Chlorophyll

Organic Matter

Percent CaCO3


Sedimentation

Phosphorus

Diatoms

Dating

Porosity
0
5
10
15
20
25
0.00%
10.00%
20.00%
30.00%
40.00%
50.00%
60.00%
70.00%
80.00%
90.00%
Sample Number
Percent Porosity
Series1
Chlorophyll
0
5
10
15
20
25
0.00
5.00
10.00
15.00
20.00
25.00
Chlorophyll mg/g
Sample Number
Series1
LAKE EAU CLAIRE
0
5
10
15
20
25
30
35
40
45
50
0
2
4
6
8
10
Organic Matter (%)
Depth (cm)
LAKE EAU CLAIRE
0
5
10
15
20
25
30
35
40
45
50
0
1
2
3
4
5
CaCO3 (%)
Depth (cm)
Grainsize
0%
20%
40%
60%
80%
100%
0-2
cm
2-4
cm
4-6
cm
6-8
cm
8-10
cm
10-
12
cm
12-
14
cm
14-
16
cm
16-
18
cm
18-
20
cm
20-
22
cm
22-
24
cm
24-
26
cm
26-
28
cm
28-
30
cm
30-
32
cm
32-
34
cm
34-
36
cm
36-
38
cm
38-
40
cm
40-
42
cm
42-
44
cm
Depth
Percent of sediment
Clay
Silt
Sand
LAKE EAU CLAIRE
0
5
10
15
20
25
30
35
40
45
50
0
500
1000
1500
2000
2500
Phosphorus (mg/g)
Depth (cm)
Stephanodiscus
0
5
10
15
20
25
30
35
40
45
0%
20%
40%
60%
80%
Percent of total Diatoms
Depth (cm)
Aulacoseira
0
5
10
15
20
25
30
35
40
45
0%
20%
40%
60%
80%
Percent of total Diatoms
Depth (cm)
Cyclotella
0
5
10
15
20
25
30
35
40
45
0%
20%
40%
60%
80%
Percent of total Diatoms
Depth (cm)
Asterionella
0
5
10
15
20
25
30
35
40
45
0%
20%
40%
60%
80%
Percent of total Diatoms
Depth (cm)
Navicula
0
5
10
15
20
25
30
35
40
45
0%
20%
40%
60%
80%
Percent of total Diatoms
Depth (cm)
Fragilaria
0
5
10
15
20
25
30
35
40
45
0%
20%
40%
60%
80%
Percent of total Diatoms
Depth (cm)

Chlorophyll and Phosphorous both
indicated nutrient loading since
1956.


Army Core of Engineers bulldozed
lakebed in 1956.


Diatoms indicated deterioration of
the health of the system.


In the 1990’s the water quality has
slightly improved, but is still poor.

Depth
Sample
Year
0-2
1
2001
2-4
2
1998
4-6
3
1995
6-8
4
1992
8-10
5
1989
10-12
6
1985
12-14
7
1982
14-16
8
1979
16-18
9
1976
18-20
10
1973
20-22
11
1970
22-24
12
1967
24-26
13
1963
26-28
14
1960
28-30
15
1956
30-32
16
-
32-34
17
-
34-36
18
-
36-38
19
-
38-40
20
-
40-42
21
-
42-44
22
-