The Effects of Climate and Anthropogenic Activity on Hydrologic Features in Yanhe River

Table 4

The effects of precipitation and human factors on hydrological features in Yanhe River.

	Period	Observed value	Predicted value	Annual actual reduction		Effects of precipitation		Effects of human activity
				Reduction	Percentage	Reduction	Percentage	Reduction	Percentage
Runoff/10^8 m^3	1961~1970	2.53	2.53
	1971~1994	2.05	2.37	0.48	19	0.16	33.3	0.32	66.7
	1995~2008	1.63	2.09	0.9	35.6	0.44	48.9	0.46	51.1
Sediment discharge/10^8 t	1961~1970	0.66	0.66
	1971~1994	0.4	0.67	0.26	0.394	−0.01	−3.8	0.27	103.8
	1995~2008	0.25	0.59	0.41	0.621	0.07	17.1	0.34	82.9