浸润锋是指水分下渗过程中,土壤被湿润的先头部位与干土形成的明显交界面。在供水充足的条件下,表土首先饱和,紧接着水分向下渗入,其含水量分布随深度而减少,最下部便是干湿土差别非常明显的界面即浸润锋。在锋面处αh/αZ(土壤含水量对深度的偏导)值很大,驱使水分继续下移。在野外,当土 Wetting front refers to the infiltration of moisture in the process, the soil is wet front of the formation of clear parts of the interface with the dry soil. In sufficient water supply conditions, topsoil first saturated, followed by water infiltration downward, the distribution of water content decreases with depth, the bottom is the difference between wet and dry soil is very obvious interface that infiltration front. At the front, αh / αZ (the partial derivative of soil moisture content to depth) is very large, driving the water downwards. In the wild, when the soil