| TOPMODEL地形指数的计算 |
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| 引用本文： | 吴波,张万昌.TOPMODEL地形指数的计算[J].水土保持通报,2006,26(5):49-52. |
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| 作者姓名： | 吴波 张万昌 |
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| 作者单位： | 1. 国际地球系统科学研究所,江苏,南京,210093
2. 中国科学院,大气物理研究所,东亚区域气候环境重点实验室,北京,100029 |
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| 基金项目： | 国家重点基础研究发展计划(973计划);中国科学院百人计划项目;中国科学院重点实验室基金 |
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| 摘 要： | 地形指数是TOPMODEL(topography index,也称湿润指数,wetness index)中一个重要的输入参数,它把流域饱和缺水量,变动产流面积的概念紧密联系起来。根据定义介绍了它的计算方法,解决了坡度为零的栅格的处理以及河道造成的地形指数值偏大的问题。并以两河口流域(2818km~2)分辨率为60m的数字高程模型栅格网为例生成地形指数,配合相应的气象数据和水文资料,在TOPMODEL中进行了径流日模拟,效率在70%左右。
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| 关 键 词： | 地形指数 数字高程模型(DEM) 两河口 |
| 文章编号： | 1000-288X(2006)05-0049-04 |
| 收稿时间： | 04 25 2006 12:00AM |
| 修稿时间： | 06 18 2006 12:00AM |
Calculation of Topography Index for the TOPMODEL |
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| WU Bo and ZHANG Wan-chang.Calculation of Topography Index for the TOPMODEL[J].Bulletin of Soil and Water Conservation,2006,26(5):49-52. |
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| Authors: | WU Bo and ZHANG Wan-chang |
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| Institution: | International Institute of Earth System Science, Nanjing University, Nanjing 210093, Jiangxi Province, China;International Institute of Earth System Science, Nanjing University, Nanjing 210093, Jiangxi Province, China;Key Laboratory of Regional Climate-Environment Research for Temperate East Asia(RCE-TEA), Chinese Academy of Sciences, Beijing 100029, China |
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| Abstract: | Topography index (wetness index) is a crucial kind of input data,which links the saturation deficit of a basin with the conception of variable contributing area.According to the definition of topography index,proce- dures of calculating the index were presented.Solutions to problems of processing grids with zero slope degree and expurgated deviations induced by the involvement of channels in computation were introduced.The index was de- rived from the DEM of the Lianghekou Basin with a solution of 60 m in this method,and then imported into TOP- MODEL with a suitable data set.The result of daily runoff simulation turns out to be acceptable with about 70% prediction precision. |
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| Keywords: | TOPMODEL |
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