Evaporation beneath the soil surface: some observational evidence and numerical experiments

摘要: In order to re-examine the process of bare soil evaporation, field observations and numerical experiments were carried out. Vertical distributions water content, temperature humidity measured with a lysimeter in which fine sand was uniformly packed under conditions. Numerical conducted by using high resolution model coupled heat flow for three example soils constant or diurnally varying atmospheric Comparison between results observation revealed that evaporation can actually take place beneath surface, mainly at bottom boundary dry surface layer (DSL). addition, different experimental conditions indicated thickness zone located DSL depends on hydraulic properties soil, also transiently within