摘要
Abstract
By analyzing the variation characteristics of runoff in Weihe River,it can provide reference for the rational development and utilization of water resources in the basin.Taking Beidao,Xianyang and Huaxian of three hydrological stations in the upper,middle and lower reaches of Weihe River as examples,the variation trend of annual runoff was analyzed.The Mann-Kendall method,ordered clustering method and sliding t test method were used to analyze the mutation of annual runoff.The results show that the annual runoff of the three stations in the main stream of the Weihe River shows a decreasing trend,and the annual runoff of the seven stations in the tributary also shows a decreasing trend.The sudden change points of runoff at each hydrological station in the main stream of Weihe River mostly occurred in the early 1970 s and the early 1990 s,and there were differences in the sudden change of different hydrological stations.The mutation points of the north road station are 1970～1971 and 1993,the mutation point of Xianyang station is between 1970 and 1990～1993,and the mutation point of Huaxian station is 1971～1972 and 1991～1995.The mutation point of Zhangjiashan on the left bank of Weihe River was from 1995 to 1996,and the mutation point of Zhuangtou station was from 1994 to 1995.The decrease of runoff in the Weihe River Basin is due to the reduction of precipitation,the increasing water consumption of the national economy,the accelerating urbanization and other factors.关键词
渭河/径流量/变化特征/突变Key words
Weihe River/runoff/variation characteristics/mutations分类
建筑与水利
