大夏河流域年径流量序列变异诊断

Alteration diagnosis of annual runoff series in Daxia River Basin

为进一步探究大夏河流域的水文变异特性,给流域管理提供更丰富的数据支持,对1956~2018年大夏河流域上、中、下游(夏河、双城、折桥)3个水文站的实测径流量序列进行变异诊断。诊断结果表明:3个水文站年径流量均显示跳跃变异显著,主要原因为水能开发利用等人类活动的影响,并且变异年份分别为1968,1968,1986年,在未来有持续减小的趋势,有可能存在供水不足危险,因此未来需进一步对大夏河流域水资源的开发利用、管理、配置进行合理优化。

In order to further explore the hydrological alteration of the Daxia River basin and provide more abundant data support for the watershed management,annual runoff series from 1956 to 2018 in the Daxia River Basin was collected to study the hydrological alteration characteristics.Runoff series was gauged by three hydrological stations(Xiahe,Shuangcheng,Zheqiao hydrological station)at the upper,middle and lower reaches of the Daxia River Ba⁃sin.The results showed that significant alteration of the runoff series happened in 1968,1968,1986 respectively,which was affected by hydropower development and utilization of human activities.And runoff series had a reducing trend continuously in the future.There may be a risk of insufficient water supply in the Daxia River basin,so it is necessary to optimize the development,utilization,management and allocation of water resources inthe Daxia Riv⁃er Basin.