水利水电技术（中英文）

通过室内土壤膜孔灌盐土水分入渗试验,分析了土壤容重对膜孔灌盐土水盐运移分布的影响。结果表明:(1)土壤容重越大,相同入渗时间的累积入渗量越小,相同灌水量下土壤湿润范围越大;(2)入渗结束时,土壤含水量以膜孔为中心呈等值线分布,土壤容重越小,相同位置的土壤含水量越大;(3)膜孔灌对盐土有明显的淋洗作用,膜孔附近土壤盐分含量远低于本底值,湿润体边缘有较高盐分累积;(4)相同灌水量下,土壤容重越小,盐分淋洗范围越大。以上研究结果可以为盐土上膜孔灌合理灌溉提供参考依据。

Through the indoor experiment on water infiltration of saline soil under film-hole irrigation,the impact of soil bulk density on the distribution of water-salt transport in saline soil under film-hole irrigation is analyzed herein.The result shows that:(1) the bigger the soil density,the less the total infiltration amount in the same time and the bigger the wetting scope under the same irrigation amount;(2) after infiltration,the soil water content shows a contour distribution with the film-hole as the center,and then the less the soil bulk density,the bigger the soil water content at the same location;(3) the film-hole irrigation has an obvious leaching effect on saline soil,i.e.the soil salt content near the film-hole is much lower than the background value of it with a higher salt accumulation at the edge of wetting front;(4) under the same irrigation amount,the less soil salt bulk content,the larger the salt leaching area.On the whole,the study results given above can lay a reference basis for the reasonable irrigation on saline soil with the film-hole irrigation.