干旱地区农业研究Issue(6)：214-219,6.
近50年来渭河干流中段径流变化特征研究
Study on change characteristics of runoff in midstream of Weihe River in recent 5 0 years
摘要
Abstract
Utilizing the runoff and precipitation data during 1960-2009 from Xianyang Station of main stream of Weihe River,and adopting the Mathematical Statistic Methods like Kendall’s rank correlation coefficient,R/S analysis, and M-K mutation test,has analyzed the change trend and mutation characteristics of the seasonal runoff in the mid-stream of Weihe River.Obtained the results as that:(1)The runoff in each season of the midstream of Weihe River all has shown a significant decreasing trend,especially in the fall .And in future,the flow changes will be maintained the same trend that continued decreasing feature;(2)Concentrated period of the average annual flow at the middle reach of the Weihe River was mainly distributed around in mid-August,the concentrated period of annual precipitation was mainly distributed around the end of July .It was probably needed 32 days from rain after stopping storage,overland flow,flow into the river channel,then convergence to the downstream river,Runoff lag period to precipitation was continued to ex-tend .The runoff coefficient has been shown a decrease trend in the past 50 years at the middle reach of the Weihe River;(3)Adopted the M-K mutation test method and the sliping t-test method ,has obtained the mutation point time was 1987,the mutation time was more close in Spring and Autumn,but the summer mutation time was more close to the av-erage annual mutation time .关键词
渭河干流/径流变化/M-K突变检验法/径流系数Key words
main stream of Weihe River/runoff change/M-K mutation test/runoff coefficient分类
天文与地球科学引用本文复制引用
裴金萍,马新萍..近50年来渭河干流中段径流变化特征研究[J].干旱地区农业研究,2013,(6):214-219,6.基金项目
国家科技基础性专项重点项目（科技部） （）
