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DEM网格尺度对水文模拟影响的研究
引用本文:林凯荣,刘珊珊,陈华,张俊.DEM网格尺度对水文模拟影响的研究[J].水力发电,2007,33(12):12-14.
作者姓名:林凯荣  刘珊珊  陈华  张俊
作者单位:1. 中山大学地理科学与规划学院,广东,广州,510275
2. 广州市水利水电勘测设计研究院,广东,广州,510640
3. 武汉大学水资源与水电工程科学国家重点实验室,湖北,武汉,430072
基金项目:国际科技合作项目;国家自然科学基金;中山大学校科研和教改项目
摘    要:选择汉江上游旬河流域为研究对象.研究了DEM网格尺度对提取流域地形特征参数的影响.采用基于地形指数的TOPMODEL模型进行水文模拟,进而分析DEM网格尺度和不同流向分配方法对径流模拟结果的影响。结果表明,DEM网格尺度对流域地形特征参数的影响还比较大,但由于模型参数率定采用了优选算法,掩盖了不同DEM网格尺度和不同流向分配方法计算的地形指数的差别.使得模拟的结果相差不大。但随着网格尺度的增大.多向分配法模拟的结果要比单向分配法好一些。

关 键 词:网格尺度  地形特征参数  水文模拟
文章编号:0559-9342(2007)012-0012-03
收稿时间:2007-07-10
修稿时间:2007年7月10日

Effects and Study of Digital Elevation Model Grid Scale on Hydrological Modeling
Lin Kairong,Liu Shanshan,Chen Hua,Zhang Jun.Effects and Study of Digital Elevation Model Grid Scale on Hydrological Modeling[J].Water Power,2007,33(12):12-14.
Authors:Lin Kairong  Liu Shanshan  Chen Hua  Zhang Jun
Affiliation:1. Department of Water Resources and Environmenl, Sun Yat-sen University, Guangzhou Guangdong 510275 ;2. The Reconnaissance and Design Academe of Water Resources and Hydropower of Guangzhou City, Guangzhou Guangdong 510640;, 3. State Key Laboratory of Water Resources and Hydropower Engineering Science, Wuhan University, Wuhan Hubei 430072
Abstract:The topographic characteristics of Xunhe basin computed by different grid sizes digital elevation model were compared. Using the TOPMODEL model based on the topographic index, the effect of DEM grid size and flow allocation method on parameters and hydrological modeling were analyzed. It is found from the analysis on different spatial resolutions that the topographic characteristics parameters of river basin are affected by DEM resolution remarkably. However, there is no much difference among the model efficiencies of TOPMODEL under the different DEM resolutions, being the effect by using the automated calibration algorithm.
Keywords:TOPMODEL
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