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首页> 外文期刊>Chinese Journal of Geochemistry >Simulation of surface runoff in theWujiang River watershed based on GIS
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Simulation of surface runoff in theWujiang River watershed based on GIS

机译：基于GIS的乌江流域地表径流模拟。

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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.
机译：利用降水，水文数据和土地利用数据，通过基于GIS的方法模拟了乌江流域的地表径流。地表径流量主要受气候，地形特征和流域土地利用类型的控制。根据1965〜2000年的气候水文数据，在乌江流域网格模型中，选择了5个代表整个流域的小流域，分别计算了其年平均降水量，年平均地表径流和当前土地利用量。 -2000年使用数据。假定地表径流是降水和土地利用的函数，并且使用多元回归工具确定地表径流，降水和当前土地利用之间的关系。因此，已经建立了每种土地利用类型的降雨径流模型。校准这些模型时，结果表明误差百分比均低于7％，这表明此仿真的准确性很高。

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