大凌河流域干旱时空分布规律分析  

Analysis of the Spatiotemporal Distribution Pattern of Drought in Daling River Basin

作　　者：李化 LI Hua(Liaoning Provincial Water Resources Affairs Service Center,Shenyang 110000,China)

机构地区：[1]辽宁省水利事务服务中心,辽宁沈阳110000

出　　处：《云南水力发电》2025年第4期27-30,共4页Yunnan Water Power

摘　　要：根据大凌河流域1968—2020年气象数据资料,采用Matlab编程计算各站点各月综合气象干旱指数、标准化降水指数SPI以及降水距平百分率Pa,通过与实际干旱情况相对比确定流域干旱情况最优评价指标为综合气象干旱指数CI,从时空变化上系统分析大凌河流域干旱分布规律,希望研究成果可以为大凌河流域防洪抗旱和水资源管理规划提供参考。Based on meteorological data from 1968 to 2020 in the Daling River Basin,this article uses Matlab programming to calculate the comprehensive meteorological drought index,standardized precipitation index SPI,and precipitation anomaly percentage Pa for each station in each month.By comparing with the actual drought situation,the optimal evaluation index for the drought situation in the watershed is determined as the comprehensive meteorological drought index CI.The distribution law of drought in the Daling River Basin is systematically analyzed from the perspective of spatiotemporal changes.It is hoped that the research results can provide reference for flood control,drought resistance,and water resource management planning in the Daling River Basin.

关 键 词：干旱指标 时空分布 变化规律 大凌河流域 防洪抗旱 

分 类 号：TV87[水利工程—水利水电工程]