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The Scientific World Journal
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2013
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Article
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Tab 2
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Research Article
Effects of Environmental Factors on Nutrients Release at Sediment-Water Interface and Assessment of Trophic Status for a Typical Shallow Lake, Northwest China
Table 2
Physical and chemical characteristics of the water and sediments.
Items
Range
Mean
SD
Water Characteristics
pH
8.18–8.84
8.45
0.38
Temperature (°C) (September)
21.5–24.1
23.1
0.84
Dissolved oxygen (mg/L)
2.81–4.83
4.01
0.58
Chl-a (mg/L)
2.60–3.48
2.91
0.72
Total N (mg/L)
2.52–2.87
2.72
0.11
Total P (mg/L)
0.06–0.80
0.13
0.19
Salinity (g/kg)
0.23–0.44
0.33
0.16
Secchi (m)
0.35–1.10
0.81
0.32
COD
Mn
(mg/L)
17.12–20.73
18.61
1.12
Electric conductivity (ms/cm)
8.19–9.78
9.14
0.53
Sediment characteristics
Water content (%)
45.4–71.3
63.6
11.7
Clay (%)
3.72–9.53
6.58
1.39
Silt (%)
62.6–86.1
76.1
9.38
Sand (%)
8.04–36.19
25.3
7.49
Organic carbon (g/kg)
6.84–23.5
14.9
8.61