通过数学模型定量的计算了大沙河流域人类活动对泥沙输移减少的贡献率平均为65.6%，而同期径流和降雨对泥沙减少的贡献率平均则为34.4%。
The average contributive ratio affecting soil erosion by human activities is 65.6%, and at the same period the contributive ratio by runoff and rainfall is 34.4%.
草地坡面的平均输沙率及坡面流速随草地盖度的增大而减小，而盖度对草地坡面径流量的影响则不明显。
The average sediment yield rate and flow velocity decrease with the increase of coverage, but the influence of coverage on runoff is not remarkable.
坡面径流平均输沙率与平均剪切力之间量良好的线性关系。
The relationship between the average sediment transport rate and the a...
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