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Low公式计算坡面流挟沙力的改进

DOI: 10.3969/j.issn.1674-0696.2012.05.28, PP. 1036-1041

Keywords: Low公式,坡面流挟沙力,一维坡面侵蚀产沙模型,改进,Lowequation,sedimentcarryingcapacityofoverlandflow,one-Dslopeerosionmodel,improvement

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Abstract:

:?坡面流的挟沙能力决定着坡面土壤是否发生侵蚀或者淤积,其计算是坡面侵蚀产沙模型开发的关键。将Low公式应用于一维坡面侵蚀产沙模型,基于径流小区实测资料修正坡度项的指数对公式提出改进。结果表明:随着坡度指数的增加,侵蚀量的模拟误差先减小后增大,存在一个临界值,使模拟误差达到最小;建议Low公式应用于坡面侵蚀产沙模型时坡度项的指数取值为0.453。

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