甘肃漳河流域水情趋势演变分析

Analysis of water regime trend evolution in Zhanghe River basin of Gansu

本文利用收集的漳河流域降水量实测资料,对该流域水文水资源变化特征从时间演变上进行了分析,并用降水资料代替径流资料对漳河枯水期径流变差倾向率(LRR)、径流年际变差倾向率(AVR)两个指标进行了研究。结果表明:漳河流域年际降水总体呈递增趋势,漳河流域年内降水量分配极不均匀;7—9月为汛期,降水量占全年降水量的70%。流域水情趋势演变分析可为科学高效利用有限水资源和防洪管理提供参考依据。

Based on the collected measured rainfall data in the Zhanghe River basin,this paper analyzes the change characteristics of hydrological and water resources in the basin from the evolution,and uses rainfall data instead of runoff data to study the two indicators of runoff variation tendency rate(LRR)and interannual variation tendency rate(AVR)in the dry season of the Zhanghe River.The results show that the annual precipitation in the Zhanghe River basin is generally increasing,and the annual rainfall distribution in the Zhanghe River basin is extremely uneven.The flood season is from July to September,and the precipitation accounts for 70%of the annual precipitation.The analysis of water regime trend evolution in the basin can provide reference basis for scientific and efficient utilization of limited water resources and flood control management.