地形指数算法对TOPMODEL模拟精度的影响  

Effect of topographic index algorithm on precision of TOPMODEL-based simulation

作　　者：解河海[1] 郝振纯[1] 黄国如[2] 黄夏坤[1] 蒋燕[1] 

机构地区：[1]河海大学水资源环境学院,江苏南京210098 [2]华南理工大学土木工程系,广东广州510640

出　　处：《水利水电技术》2007年第8期19-22,共4页Water Resources and Hydropower Engineering

基　　金：教育部新世纪优秀人才支持计划资助项目(NCET-05-0483);国家自然科学基金资助项目(50309002);南京师范大学地理信息科学江苏省重点实验室开放基金资助项目(JK20050305)

摘　　要：TOPMODEL是以地形为基础的半分布式流域水文模型,地形指数为该模型最为核心的内容之一。简要介绍了地形指数计算中较为常用的单流向法、多流向法和改进的多流向法,并以东江流域中的小试验流域星丰为例,探讨了不同的地形指数计算方法对TOPMODEL模拟精度的影响。洪水的研究结果表明,采用改进的多流向法所得到的模拟精度更高。TOPMODEL is a topography-based half-distributed hydrological model for watershed, for which the topographic index is the core of it, The single flow direction algorithm, multiple flow direction algorithm, improved multiple flow direction algorithm normally used in the calculation of the topographic indexes are briefly described herein, and then the effects from various algorithms for calculating the topographic indexes on the precision of TOPMODEL are discussed by taking Xingfeng Watershed within Dongjiang River Basin as the studying case. The result from study on flood shows that the precision is higher, if the calculation is made by the improved multiple flow direction algorithm,

关 键 词：TOPMODEL 地形指数 改进的多流向法 星丰流域 

分 类 号：P33[天文地球—水文科学]