Hydrologic method and soil conservation method are two usual methods for calculating sediment and runoff reduction benefit brought by watershed management, but both have some problems.

水文法和水保法是分析计算流域治理减水减沙效益常用的两种方法，但都存在一些问题。

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The experiment results are meaningful for quantifying runoff and sediment reduction and deepening soil erosion mechanical process also.

研究结果对定量评价草被减流减沙作用和深化土壤侵蚀力学过程有一定的参考意义。

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