考虑降雨空间分布的地貌瞬时单位线汇流模型探究与应用  

Research and Application of Geomorphic Instantaneous Unit Hydrograph Considering Rainfall Spatial Distribution

作　　者：唐宏进 李致家[2] 张卫国 孙如飞 TANG Hongjin1, LI Zhijia2, ZHANG Weiguo1, SUN Rufei1(1. Ningbo Hydraulic Waterpower Planning and Designing Research Institution, Ningbo 315192, Zhejiang, China; 2. College of Hydrology and Water Resources, Hohai University, Nanjing 210098, Jiangsu, China)

机构地区：[1]宁波市水利水电规划设计研究院,浙江宁波315192 [2]河海大学水文水资源学院,江苏南京210098

出　　处：《水力发电》2018年第9期28-31,共4页Water Power

基　　金：自然科学基金资助项目(51679061);浙江省水利厅科技项目(RA1502);宁波市水利科技项目(NSK201715)

摘　　要：降雨空间分布的不均匀性对洪水预报精度有着重要的影响,提出基于数字高程模型和降雨空间分布规律的地貌瞬时单位线汇流计算方法,进一步补充地貌瞬时单位线汇流理论。选取横山水库流域作为研究对象,利用DEM数据提取流域地形地貌特征,结合历史洪水期间的降雨空间分布律计算得到地貌瞬时单位线。选取2013年~2015年期间3场典型洪水进行模拟验证,结果表明考虑降雨空间分布的地貌瞬时单位线洪水模拟效果良好,优于传统地貌瞬时单位线。The inhomogeneity of rainfall spatial distribution has an important impact on the accuracy of flood forecasting. A calculation method of geomorphic instantaneous unit hydrograph（ GIUH） based on digital elevation model and rainfall spatial distribution is proposed as a further supplement to the theory of GIUH. Selecting Hengshan Reservoir Basin as research object,the watershed topographic features is extracted from DEM, and the GIUH combined with rainfall spatial distribution during historical floods is calculated. Three typical floods during 2013-2015 are selected for model simulation and verification. The results show that the simulation accuracy of GIUH which considers rainfall spatial distribution is better than that of traditional GIUH method.

关 键 词：洪水模拟 地貌瞬时单位线 降雨空间分布 横山水库 

分 类 号：TV122[水利工程—水文学及水资源]