Understanding the Spatial Heterogeneity of CO2 and CH4 Fluxes from an Urban Shallow Lake: Correlations with Environmental Factors
Table 2
The characteristics of environmental factors in water, air, and sediment.
Environmental factors
Heavily polluted sites
Lightly polluted sites
1#, 2#, 4#, 5#, 6#, 8#
3#, 7#, 9#, 10#
Max
Min
Average
SD
Max
Min
Average
SD
Wind1(1)
1.32
0.13
0.99(3)
0.44
1.38
0.21
0.88
0.54
Wind2(2)
0.53
0.01
0.16
0.19
1.25
0.10
0.60
0.53
Wf1
0.32
0.01
0.14
0.14
0.06
0.01
0.02
0.03
Wf 2
0.28
0.01
0.12
0.13
0.04
0.01
0.02
0.02
DO1(4)
5.36
3.47
4.25
0.75
5.72
3.46
4.86
0.99
DO2
7.28
3.54
5.35
1.42
7.22
5.38
6.33
0.75
pH1
8.11
7.25
7.83
0.34
8.41
7.71
8.08
0.29
pH2
8.61
7.87
8.21
0.30
8.94
8.21
8.52
0.30
Tur1
38.20
10.40
25.81
10.81
25.60
13.73
20.98
5.29
Tur2
24.80
12.25
18.53
4.72
22.25
16.95
19.16
2.61
T1
30.40
28.90
29.68
0.53
29.60
28.50
29.08
0.46
T2
25.40
24.90
25.17
0.16
25.15
24.75
24.95
0.17
Tw1
28.90
27.60
28.43
0.52
28.40
27.40
27.95
0.42
Tw2
25.00
23.55
24.23
0.53
25.00
23.30
24.39
0.75
COND1
306.00
279.00
293.83
10.65
303.00
283.00
290.50
8.70
COND2
363.50
298.00
332.42
29.73
359.50
291.50
314.00
31.04
ORP1
117.00
68.00
91.50
17.78
132.00
87.00
114.50
19.60
ORP2
141.00
95.50
114.92
17.63
132.00
95.00
112.38
15.23
TN1
3.76
1.52
2.92
0.87
2.29
1.35
1.74
0.40
TN2
3.62
2.41
2.84
0.43
2.36
1.40
1.90
0.48
N-1
2.31
0.98
1.76
0.61
1.35
0.81
1.15
0.24
N-2
2.43
0.92
1.59
0.61
1.16
0.36
0.72
0.33
N-1
0.53
0.07
0.35
0.16
0.37
0.14
0.25
0.10
N-2
0.70
0.45
0.59
0.10
0.53
0.22
0.36
0.15
N-1
0.07
0.02
0.04
0.02
0.04
0.01
0.03
0.01
N-2
0.06
0.03
0.05
0.01
0.05
0.02
0.04
0.01
COD1
9.27
5.78
7.56
1.22
5.87
4.71
5.26
0.48
COD2
8.65
4.94
6.40
1.59
5.25
4.37
4.70
0.39
OM1
4.97
3.95
4.70
0.38
3.76
3.39
3.53
0.17
OM2
4.61
4.06
4.32
0.24
3.85
3.15
3.57
0.30
TNs1
4392.89
2671.02
3522.90
613.50
3689.53
2577.65
3135.61
477.05
TNs2
4286.14
2944.51
3554.32
525.95
3082.49
2562.86
2791.87
215.86
N-s1
2106.92
1305.64
1750.79
298.74
1835.45
1256.15
1558.62
244.49
N-s2
2068.79
1425.03
1706.08
270.66
1590.89
1014.23
1309.27
239.53
Note. (1)1 refers to the data in summer; (2)2 refers to the data in autumn; (3)the bold number is larger value in two kinds of sampling sites (heavily polluted sites or lightly polluted sites). (4)The units of wind rate and Wf (water flow rate) are all m/s; the unit of Tur is NTU; the unit of T and Tw is °C; The unit of COND is μs/cm; the unit of ORP is mv; the units of DO, TN, N-, N-, N-, and COD are all mg/L; the unit of OM is %; the units of TNs and N-s are mg/kg.
