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

Table 4

Impacts of precipitation () and human activities (HA) on changes of sediment load (10⁶ t).

	Period	Sediment load		Impact of	Impact of HA
Annual scale	1955–1979	60.86
	1980–1996	37.66	49.30	10.09 (43.5%)	13.11 (56.5%)
	1980–2010	10.50	50.67	10.19 (20.2%)	40.17 (79.8%)
Flood season	1955–1979	60.77
	1980–1996	37.49	47.70	9.17 (39.4%)	14.10 (60.6%)
	1980–2010	9.96	46.10	14.67 (28.8%)	36.14 (71.1%)