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Study on distribution and use of rainfall of interval coverage on Lou soil slope land

机译：娄土坡地区间覆盖率降雨分配与利用研究

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摘要

Using indoor artificial simulated rainfall, rainfall use efficiency, wetting front shape and soil moisture content were analyzed to investigate water distribution and rainwater use of interval coverage on Lou soil slope land. The results showed that with area ratio increased, under same rainfall intensity and slope, rainfall use efficiency decreased, and the maximum rainfall use efficiency of uncoveraged treatment was 58.93%. There was no significant difference in wetting front shape and the maximum depth of each treatment, and the maximum depth was 17cm, which located at the conjunction point of coverage area and infiltration area, which all were higher than that of CK. Soil profile moisture distribution of each treatment accorded to general rule, which gradually decreased from surface to deeper layer. Water content at the conjunction point was slightly higher than other points. Average soil moisture content in infiltration area decreased with area ratio increased, but they were all higher than that of CK. The results also showed that coverage measures could increase actual acceptable rainfall and soil water storage of infiltration area. But how to determine appropriate area ratio to improve rainwater use efficiency under different experimental conditions still need to be further investigated.
机译：分析了利用室内人工模拟降雨，降雨利用效率，润湿的前形状和土壤水分含量，以研究水分分布和雨水在娄土地坡面覆盖的雨水。结果表明，面积比增加，在相同的降雨强度和坡度下，降雨利用效率降低，未染地治疗的最大降雨效率为58.93％。润湿前形状和每种处理的最大深度没有显着差异，最大深度为17厘米，位于覆盖区域和渗透区域的结合点，这一切都高于CK。每种治疗的土壤轮廓水分分布均为一般规则，从表面逐渐降低到更深层。结合点的水含量略高于其他点。渗透区域的平均土壤水分含量随面积比下降，但它们均高于CK。结果还表明，覆盖措施可能会增加渗透区域的实际可接受的降雨量和土壤储水。但是如何确定在不同实验条件下提高雨水利用效率的适当面积比仍然需要进一步调查。

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