Evaluation of the Impacts of Land Use on Water Quality: A Case Study in The Chaohu Lake Basin

Table 2

Descriptive statistics for the study area, including water quality and land use characteristics.

Categories	Variable	Obs	Mean	Min	Max	S.D.
Water quality	CODmn (mg/L)	81	5.18	2.7	7.8	1.09
	NH3–N (mg/L)	81	0.54	0.00	1.61	0.39
	TP (mg/L)	81	0.19	0.07	0.57	0.19
	TN (mg/L)	81	2.23	1.04	6.48	1.11
	DO (mg/L)	81	8.22	6.69	9.65	0.58
Land use	Cultivated land (%)	81	0.47	0.32	0.80	0.12
	Forest land (%)	81	0.02	0.00	0.06	0.02
	Grassland (%)	81	0.02	0.00	0.67	0.02
	Water area (%)	81	0.36	0.00	0.58	0.16
	Built-up area (%)	81	0.11	0.03	0.33	0.08
Landscape metrics	Shannon	81	2.83	1.76	3.85	0.50

S.D.: standard deviation.