The basic theory of soil and water loss research has been provided by combining the several physical laws of energy with rain and runoff on slope.

把能量中的几个物理定律同降雨、坡面径流联系起来，为进一步研究水上流失提供了理论基础。

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Based on observation data of experiment plots at the City of Zhangjiakou, analysis was made on the effect of rainfall intensity on the relationship among slope length, runoff and soil loss.

张家口市水保试验站坡长小区五年观测资料表明，降雨强度影响径流量、侵蚀量随坡长的变化。

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