西南地区流域设计洪峰与集水面积关系探讨

由于西南地区地形地貌复杂多变,许多地区缺乏实测洪水资料,给水利工程建设带来诸多不便。为了解决上述问题,为水利工程建设提供参考资料,基于西南地区11个流域66个水文站点的设计洪峰流量(Q_p)和集水面积(F)资料,通过统计分析,分类研究了西南地区Q_p与F之间的关系。结果表明:嘉陵江流域、沱江流域、涪江流域、岷江流域、澜沧江流域Q_p与F之间能较好地满足线性关系;大渡河流域、青衣江流域、雅砻江流域Q_p与F之间指数关系较显著;金沙江流域、怒江流域和雅鲁藏布江流域Q_p与F之间幂函数关系较好。研究成果可为无资料地区建立流域Q_p与F之间的相关关系提供参考。

Relationship Between Design Flood Peak Discharge and Collecting Area of River Basins in Southwest China

The lack of flood measurement data due to complex and changeable landform brings about many incon-veniences to hydro-project construction in southwest China. According to data of design flood peak discharge (Qp) and collecting area(F) at 66 hydrologic stations in 11 basins in the southwest region of China,the relationship be-tween Qpand F is researched by statistical analysis. Results show the Qp-F relationships in the Jialing River basin, Tuojiang River basin, Fujiang River basin, Minjiang River basin and Lancang River basin follow linear relation-ship;while in the Dadu River basin,Qingyi River basin and Yalong River basin,the Qp-F relationships match well with exponential relationship;and in the Jinsha River basin,Nujiang River basin and Yarlung Zangpo River basin the relationships conform well to power function. The research results offer reference for obtaining the Qp-F relation-ships in ungauged river basins.