湿润锋

通过室内垂直一维积水入渗试验，从入渗量、入渗率、湿润锋、土壤含水量分布等方面分析了间歇入渗特性。

By indoor experiment this paper analysis the characteristic of the intermittent infiltration from infiltration amount , infiltration rate , wetting front and moisture content in soil .

实验研究表明，随着土壤密度和滴头流量的增加，点源入渗水平向湿润锋的分布距离加大，垂向入渗距离相应减小，土壤湿润体的形状趋向于扁平状。

With the increment of soil bulk density and water discharge rate , the movement of horizontal wetting front increased and the vertical movement decreased .

分析结果表明：雨水入渗过程受初始渗流场影响很大，初始含水量的大小影响湿润锋的推进。

Analyzing results show that the rainfall seepage process is affected greatly by the initial seepage field ;

四种灌溉施肥策略下，湿润体内部的硝态氮含量均低于本底值，主要累积在湿润锋边缘。

Four irrigation fertilization strategies , nitrate content are all lower than the background value in wet area internal . Nitrate concentration accumulated at the wet front edge .