An Analysis of the Characteristics of Water Resources of West River, North River and East River
Based on the measured hydrological data of controlled hydrological station of the West River, the North River and the East River from 1959 to 2010, the Mann-Kendall method and the degree of concentration are used to analyze the characteristics of water resources of the rivers.The results show that: ① The runoff of the West River, the North River and the East River has obvious wet and dry water changes, the long series of runoff have decreasing trends, and the annual runoff is different in different ages.② The runoff of the West River had a rising tendency in 1968-1987 and 1997-2003, which had a decreasing tendency in other times.The runoff of the North River had a rising tendency in 1996-2008, which had a decreasing tendency in 1963-1974 and 1986-1994.The runoff of the East River had a increasing tendency from 1976 to 1988, which has a decreasing tendency in 1959-1975 and 1989-1996.The trends of changes have not passed the 95% confidence test,the increase and decrease are not significant.③ It is different that the variation of runoff in a year of the West River, the North River and the East River at different time intervals since 1960s.It is larger that the uneven distribution during the year of runoff of the West River, the North River than the East River.The distribution during a year of runoff becomes obviously homogenized.The ratio of annual minimum runoff to annual average runoff of the East River has obvious increasing tendency, which is favorable to the development and utilization of water resources.
characteristics of water resourcesinter-annual changeannual changeWest RiverNorth River and East River
NETL
NSTL
万方数据
维普
