新安江上游流域水文要素分析研究

Analysis and Research of Hydrological Elements in the Upper Reaches of Xin’anjiang River Basin

统计研究水文要素的变化规律,可为未来合理利用、开发水资源,保障流域生态流量提供依据,对于水利治理管理工作具有重要意义。本文根据新安江上游流域各水文要素实测资料,利用变差系数、极值比及差积曲线法等水文统计的方法,分析研究流域降水、径流、蒸发、泥沙、土壤墒情及流域蓄水量等水文要素时空变化。结果表明:各水文要素与降水均有相关关系,极端气候呈频发趋势,植树造林等森林恢复举措有了较大成效。

Statistical study of hydrological element variation patterns can provide a basis for rational utilization and development of water resources,as well as ensuring ecological flow in the basin in the future.This holds significant importance for water conservancy management and governance.Based on the measured data of various hydrological elements in the upper Xin’anjiang River Basin,this paper employs hydrological statistical methods such as coefficient of variation,extreme value ratio,and cumulative difference curve to analyze the spatial and temporal changes of hydrological elements including precipitation,runoff,evaporation,sediment,soil moisture,and watershed storage.The results indicate a correlation between these hydrological elements and precipitation,with a trend of increased occurrence of extreme weather events.Afforestation and other forest restoration measures have shown promising outcomes.