Impacts of Climate Variability and Human Activities on the Changes of Runoff and Sediment Load in a Catchment of the Loess Plateau, China

Table 1

Statistics of streamflow and sediment load at the annual and flood season scales during 1965–2010.

	Annual hydrological variables	Trend test			Change point test
			Slope	Mean	Before 1979	1980–1996	After 1997
Annual case	(10^8 m^3)			1.12	1.73	1.17	0.39
	Sed (10^4 t)			3679.3	6088.7	3762.2	996.9
	SC (kg/m^3)			279.3	337.5	276.6	220.2
	Cr (%)			9.3	13.8	9.9	3.7
Flood season	(10^8 m^3)			1.0	1.55	1.03	0.38
	Sed (10^4 t)			3670.5	6077.6	3748.9	996.3
	SC (kg/m^3)			318.7	391.2	328.0	229.6
	Cr (%)			9.1	13.2	9.5	4.3