Spatial and Temporal Variation of Annual Precipitation in a River of the Loess Plateau in China

Table 4

Variation points in annual precipitation trends in the Weihe basin.

Subbasins	Meteorological stations	Variation points
		1960–1969	1970–1979	1980–1989	1990–1999	2000–2011
Weihe basin above Beidao station	Tianshui		1971	1983, 1985		2002
	Minxian			1986, 1988		2006
	Huajialing			1986
	Lintao			1986, 1987		2003, 2006, 2008
	Xiji					2005
Jinghe basin	Huanxian		1970			2002
	Guyuan		1972	1986	1996
	Pingliang		1971, 1977	1980–1985*	1990
	Xifengzhen		1972, 1979
	Changwu		1978, 1979	1983, 1985
Beiluohe basin	Wuqi		1971–1974*	1981, 1983, 1986–1995*, 1998		2000, 2003, 2007
	Yan’an		1972–1975*; 1978, 1979	1982
	Luochuan		1970, 1976
Beidao to Huaxian section of Weihe mainstream	Baoji	1969	1971, 1974, 1976, 1978	1980, 1982
	Wugong	1961, 1964–1970*
	Xi’an	1962, 1965
	Tongchuan		1976	1983, 1985
	Zhen’an		1972, 1975
	Foping	1966, 1968	1973, 1977, 1979	1986, 1988
	Shangxian	1960, 1963	1971, 1975	1984
	Huanshan			1986

Extraction method: Mann-Kendall method. *indicates that variation occurred frequently during the indicated period.