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河流的流域面积是如何计算的
更新时间: 2020-10-24 00:00:00  

流域面积是指流域周围分水线与河口断面之间所包围的面积,一般指地表水的集水面积。一般作出流域的分水线即山脊线,由分水岭所围的区域即为流域的范围;因图形不规范,计算时一般算出图幅面积后,再分析流域面积占图幅面积的比重,相乘即可。

关键词: 河流 流域 面积 如何 计算

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