Experimental Study on Soil Water Movement and Salt Transport Characteristics of Evaporation from Film Holes in Perforated Plastic Mulch after Trickle Infiltration
Experimental Study on Soil Water Movement and Salt Transport Characteristics of Evaporation from Film Holes in Perforated Plastic Mulch after Trickle Infiltration
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发表时间：
2004
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影响因子：
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通讯作者：
L. Yi;Wang Wen-yan;Shao Ming’an
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作者：
L. Yi;Wang Wen-yan;Shao Ming’an
通过滴灌后不同开孔率的蒸发试验，分析了开孔率对累积蒸发量的影响。结果表明，累积蒸发量与蒸发时间的平方根之间存在良好的线性关系，其系数与开孔率之间存在良好的相关性，从而得到累积蒸发量的双因子函数。累积蒸发量随时间的变化关系与Gardner的裸地蒸发理论函数相对应，累积蒸发量的双因子函数扩展了Gardner的理论，使其在膜孔蒸发中具有实用性。分析了相对累积蒸发量和膜孔面积累积蒸发量随膜孔比变化的函数特征，比较了倮地蒸发与全膜覆盖蒸发的土壤含水量、土壤含盐量和土壤含盐量的分布规律。最后绘制了等值线图。
Based on experiments of evaporation with different open hole ratios after trickle irrigation, the influence of open hole ratio on cumulative evaporation was analyzed. The results showed that there was good linear relation of cumulative evaporation with square root of evaporation time, and the coefficients of them had good relation with the open hole ratio, thus the two-factor function of cumulative evaporation was obtained. The relation of cumulative evaporation with time was corresponding to Gardner's theoretical function of bare soil evaporation, and the two-factor function of cumulative evaporation extended Gardner's theory and made it practical in film hole evaporation. Theveafter, the functional characteristics of relatively cumulative evaporation and cumulative evaporation on per film hole area varying with film hole ratios were analyzed, and the distributions of soil water content, soil salt content and soil salt concentration of bare soil evaporation were compared with those of evaporation under entirely plastic mulch. Finally the contour maps were drawn out.