乌裕尔河流域依安县水文站径流演变特征分析

Analysis of the Evolution of Runoff at the Hydrologic Stationin Yi’an County Wuyuer River Basin

乌裕尔河流域是依安县境内重要的地表水来源,分析依安县境内乌裕尔河流域水资源的演变趋势尤为重要。基于依安县水文站1953-2020年天然径流量资料,采用差积曲线法、年径流过程线图法以及年内变化分析法进行分析。结果显示,年径流量主要集中在4-10月份,占年平均径流量的91.95%,其中8月份径流量最大,达到76.75 m^(3)/s,所占百分比为32.27%;径流年际变化共有3个丰水段、3个枯水段、2个丰枯交替段。

The Wuyuer river basin is an important source of surface water in Yi’an County,and it is particularly important to analyze the evolution trend of water resources in Wuyuer river basin in Yi’an county.Based on the natural runoff data of 1953-2020 at Yi’an hydrological station,the results show that the annual runoff is mainly concentrated in April-October,accounting for 91.95%of the annual average runoff,the largest runoff was 76.75 m^(3)/s in August,representing a percentage of 32.27%,and the annual change in runoff was 3 abundant water segments,3 dry water segments and 2 dry alternate segments.