入渗水矿化度对点源滴灌土壤水盐运移特征的影响

Effects of Water Salinty on Soil Salt and Water Movement under a Point Source Drip Irrigation

通过室内试验,初步研究了入渗水矿化度对点源滴灌土壤水盐运移特征的影响,结果表明,在入渗土层深度相同时,入渗水矿化度越高,土壤剖面含水率和土壤剖面含盐量相对越大;在入渗时间相同时,入渗水矿化度越高,湿润锋水平运移的距离越大;在点源滴灌条件下湿润锋水平运移距离随滴水时间的变化规律符合二次函数关系。

This paper studies initially on salt and water movement affected by mineralization degree of infiltration water under a buried trickle source through laboratory test. The results show that, at the same depth of soil ,the higher the salinity of water,the greater for soil moisture and soil salinity profiles. At the same infiltration time, the higher the salinity of water, the greater for the migration distance of moist in the horizontal direction; Under point sources drip irrigation,the distance of wetting front transport is related drip time with a nonlinear correlation.