Analysis on the Long-term Evolution of Runoff Volume and Its Affecting Factors in the Luanhe River Basin
Based on the data of runoff volume in the Luanhe River Basin during the period of 1956-2008,the M-K test and power spectrum analysis were used to analyze the evolution of runoff volume in the Luanhe River Basin.Meteorological data observed by 9 meteorological stations during the period of 1957-2008 and the land use data during the period of 1985-2000 were used to identify the factors affecting the change of runoff volume.The results show that the runoff volume was holistically in a decrease trend,especially in the upper reaches.The decrease trend was more significant during the low-flow periods,which indicates that drought and flood may occur more frequently.The results also show that the runoff volume was sharply decreased in 1959 and 1996,increased in the late-1980s,and decreased again after 1998.There was a 16-year periodicity of runoff volume change in the Luanhe River Basin and a 64-year one in the upper reaches,and there were also the 9-10-year 2-3-year periodicities in the middle and lower reaches.The most important climate factors affecting runoff volume were precipitation and evaporation,and then land use cover change.
runoff volumeland useaffecting factorM-K testLuanhe RiverHebei Province
国家科技期刊平台
NSTL
万方数据
维普
