| Simulation of surface runoff in theWujiang River watershed based on GIS |
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| 作者姓名： | TANG Congguo LIU Congqiang |
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| 作者单位： | TANG Congguo1，2and LIU Congqiang1 1 State Key Laboratory of Environmental Geochemistry，Institute of Geochemistry，Chinese Academic of Sciences，Guiyang 550002，China 2 Graduate University，Chinese Academic of Sciences，Beijing 100049，China |
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| 基金项目： | This work was financially supported by the Ministry of Science and Technology of China through National Program on Key Basic Research Project （Grant No. 2006CB403200） and the Foundation of the Innovation Program of the Chinese Academy of Sciences （Grant No. KZCX3-SW-140 and KZCX1-SW-12）. |
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| 摘 要： | Surface runoff in the Wujiang River watershed was simulated by a GIS-based method using precipitation, hydrology data, and land-use data. The volume of surface runoff is chiefly controlled by climates, topographical characteristics and types of land use at the watershed. Five subwatersheds that can represent the whole watershed were chosen and their average annual precipitation, average annual surface runoff and current land use were calculated respectively in the grid model of the Wujiang River watershed based on the climate and hydrology data from 1965 to 2000 and the land-use data acquired in the year of 2000. Surface runoff is assumed to be a function of precipitation and land use and the multiple regression tool is used to determine the relationship between surface runoff, precipitation and present land use. Thus, the rainfall-runoff model for each land-use type has been established. When calibrating these models, the results show that the percent errors are all below 7%, which indicates that the accuracy of this simulation is high.
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| 关 键 词： | 分水岭 表面径流 底流 乌江 |
| 收稿时间： | 10 April 2006 |
| 修稿时间： | 2006-04-102006-05-19 |
Simulation of surface runoff in the Wujiang River watershed based on GIS |
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| TANG Congguo LIU Congqiang.Simulation of surface runoff in theWujiang River watershed based on GIS[J].Chinese Journal of Geochemistry,2007,26(3):284-289. |
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| Authors: | Tang Congguo Liu Congqiang |
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| Affiliation: | (1) State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academic of Sciences, Guiyang, 550002, China;(2) Graduate University, Chinese Academic of Sciences, Beijing, 100049, China |
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| Abstract: | Surface runoff in the Wujiang River watershed was simulated by a GIS-based method using precipitation, hydrology data, and land-use data. The volume of surface runoff is chiefly controlled by climates, topographical characteristics and types of land use at the watershed. Five subwatersheds that can represent the whole watershed were chosen and their average annual precipitation, average annual surface runoff and current land use were calculated respectively in the grid model of the Wujiang River watershed based on the climate and hydrology data from 1965 to 2000 and the land-use data acquired in the year of 2000. Surface runoff is assumed to be a function of precipitation and land use and the multiple regression tool is used to determine the relationship between surface runoff, precipitation and present land use. Thus, the rainfall-runoff model for each land-use type has been established. When calibrating these models, the results show that the percent errors are all below 7%, which indicates that the accuracy of this simulation is high. |
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| Keywords: | simulation watershed surface runoff baseflow Wujiang River |
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