Study on Effects of Rainfall and Soil Structure on Raindrop Splash
Study on Effects of Rainfall and Soil Structure on Raindrop Splash
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DOI：
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发表时间：
2001
影响因子：
3.9
通讯作者：
G. Xue
中科院分区：
文献类型：
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作者：
G. Xue
以安塞、绥德、杨凌、杨凌3种黄土土壤为研究对象，进行了降雨模拟试验，探讨了降雨和土壤结构对雨滴溅落的影响。结果表明，指数公式是描述降雨与飞溅量关系的最佳函数。雨滴溅射侵蚀力定义为降雨动能与雨滴中位直径的乘积（ed50），其与溅射量呈线性相关。由于它显示了雨滴溅射势，因此它可能是雨滴侵蚀侵蚀力的一个重要参数。水花总量随降雨时间的延长而增加，但每平方米每分钟平均水花产量随降雨时间的延长而减少。溅射量随降雨持续时间的变化过程可以用幂函数表示。未扰动土壤的雨滴飞溅量仅为扰动土壤的22%~30%，但扰动土壤与未扰动土壤雨滴飞溅量的差异随着降雨持续时间的增加而减小。
Simulated rainfall experiments with 3 loessial soils of Ansai, Suide, Yangling, and Yangling arable soil were conducted to evaluate effects of rainfall and soil structure on raindrop splash. The results showed that exponential formula were the best function to describe the relationship between rainfall and splash amount. Raindrop splash erosivity was defined as the product of kinetic energy of rainfall and median diameter of raindrops (Ed 50 ), which was linearly related to the splash amount. Since Ed 50 demonstrated the raindrop splash potential, it may be an important parameter in raindrop erosion erosivity. The total of splash amount increased with the increase of rainfall duration, however, averaged splash production per square meter per minute decreased with the duration of raining time. The process of splash amount with rainfall duration could be formulized by a power function. The splash amount of undisturbed soil was only 22%～30% as much as that of disturbed soil, but the difference of raindrop splash between disturbed soil and undisturbed soil decreased with the increase of rainfall duration.