一、任务的提出: 大規模羣众性水利工程在流域内普遍开展以后,在58年汛期大部分地区对羣众性水利工程和水土保持措施的效果开始进行了观測研究工作,通过实测資料的分析,已經初步对这些工程减少洪水徑流方面获得了一些認識,今年仍須繼续进行对暴雨洪水在水利化地区的观測研究工作,以求进一步地解决各种工程措 First, the task proposed: large-scale mass water conservancy projects in the basin after the widespread, most of the 58-year flood season for mass water conservancy projects and soil and water conservation measures began to observe the effect of research work, through the measured data , Some preliminary understandings have been obtained on these projects to reduce flood runoff. This year, observational research on storm floods in water conservancy areas still needs to be continued so as to further solve various engineering measures