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降水在土壤表面产生密闭现象有着复杂的理化和高度动力学性质。物理过程包括雨滴打击及其后的地表土含水量达到饱和与径流作用下土壤压实、剥离和搬运。一旦地表水分达到饱和 ,土壤颗粒间的运动 (垂直的和水平的 )就会导致土壤表层形成一层平衡状态下的土壤基本介质。这就是降
Precipitation on the soil surface to produce a closed phenomenon has a complex physical and chemical properties and high dynamics. Physical processes include raindrop strike and subsequent soil moisture saturation and run-off, soil compaction, stripping and handling. Once the surface moisture is saturated, the movement of soil particles (vertical and horizontal) causes the soil surface to form a layer of soil base medium in equilibrium. This is down