Effects of Environmental Factors on Nutrients Release at Sediment-Water Interface and Assessment of Trophic Status for a Typical Shallow Lake, Northwest China
Table 4
Major physicochemical parameters of water quality in the Daihai Lake.
Sampling sites
Chl-a (mg/m3)
CODMn (mg/L)
-N (mg/L)
NO2-N (mg/L)
NO3-N (mg/L)
TN (mg/L)
TP (mg/L)
SD (m)
pH
WT (°C)
DH-1
2.82
18.98
0.0254
0.0033
0.171
2.65
0.1286
0.71
8.81
23.1
DH-2
3.48
19.99
0.0197
0.0029
0.131
2.78
0.0661
0.51
8.47
23.6
DH-3
3.18
16.29
0.0217
0.0042
0.101
2.43
0.0673
0.69
8.33
23.3
DH-4
2.65
17.49
0.0292
0.0003
0.115
2.78
0.0727
0.89
8.18
23.5
DH-5
2.89
18.01
0.0121
0.0005
0.109
2.69
0.0659
0.75
8.34
24.1
DH-6
2.89
18.72
0.0114
0.0007
0.123
2.65
0.1446
0.92
8.82
24.3
DH-7
2.89
19.84
0.0075
0.0017
0.117
2.59
0.0594
0.85
8.45
23.4
DH-8
2.91
20.73
0.0248
0.0021
0.121
2.71
0.0767
0.91
8.07
22.8
DH-9
2.73
17.41
0.0122
0.0019
0.113
2.82
0.0661
0.81
8.84
22.5
DH-10
2.71
18.72
0.0690
0.0029
0.118
2.69
0.0594
1.09
8.87
23.6
DH-11
3.01
19.32
0.0158
0.0023
0.116
2.52
0.7996
0.42
8.15
22.3
DH-12
2.61
17.79
0.0095
0.0051
0.112
2.71
0.0671
0.85
8.48
22.7
DH-13
2.77
17.41
0.0478
0.0345
0.119
2.71
0.0642
0.45
8.37
22.5
DH-14
3.26
19.02
0.0189
0.0027
0.116
2.87
0.1273
0.35
8.32
21.7
DH-15
2.79
17.12
0.0177
0.0091
0.116
2.85
0.0631
0.64
8.01
21.8
Average
2.89
18.61
0.0185
0.0049
0.121
2.72
0.1332
0.72
8.44
22.9
SD: Secchi disk depth; WT: water temperature; TN: total nitrogen; TP: total phosphorus.
