从实测径流看华北地区水资源

WATER RESOURCE IN NORTH CHINA DEDUCED FROM MEASURED RUNOFF

简述了华北地区主要河流水系（ 滦河、海河、黄河中下游） 地表水的现状，对重要径流控制站的年均径流量作了年代际的统计分析，结果表明：降水随年代际有升有降，径流也随着降水的起伏而变化，但是径流与降水的区别在于７０ 年代之后径流随年代际的递减趋势十分明显。

The present situation of ground surface water of main river systems,in North China,such as Luanhe river,Haihe river,and middle and lower reaches of Yellow River,is simply described. The inter decade statistical analysis of yearly averaged runoff in some important runoff control stations is made. The important result is,as rainfall rises and falls as decade passes,runoff undulates just as rainfall. The difference is that the runoff has an obvious decreasing tendency decade by decade since 1970's.