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首页> 美国卫生研究院文献>The Scientific World Journal >Dynamics of Soil Water Evaporation during Soil Drying: Laboratory Experiment and Numerical Analysis
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Dynamics of Soil Water Evaporation during Soil Drying: Laboratory Experiment and Numerical Analysis

机译：土壤干燥过程中土壤水分蒸发的动力学：室内实验与数值分析

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摘要

Laboratory and numerical experiments were conducted to investigate the evolution of soil water evaporation during a continuous drying event. Simulated soil water contents and temperatures by the calibrated model well reproduced measured values at different depths. Results show that the evaporative drying process could be divided into three stages, beginning with a relatively high evaporation rate during stage 1, followed by a lower rate during transient stage and stage 2, and finally maintaining a very low and constant rate during stage 3. The condensation zone was located immediately below the evaporation zone in the profile. Both peaks of evaporation and condensation rate increased rapidly during stage 1 and transition stage, decreased during stage 2, and maintained constant during stage 3. The width of evaporation zone kept a continuous increase during stages 1 and 2 and maintained a nearly constant value of 0.68 cm during stage 3. When the evaporation zone totally moved into the subsurface, a dry surface layer (DSL) formed above the evaporation zone at the end of stage 2. The width of DSL also presented a continuous increase during stage 2 and kept a constant value of 0.71 cm during stage 3.
机译：进行了实验室和数值实验，以研究连续干燥过程中土壤水分蒸发的演变。通过校准模型模拟的土壤水含量和温度很好地再现了不同深度的测量值。结果表明，蒸发干燥过程可以分为三个阶段，从阶段1较高的蒸发速率开始，然后在过渡阶段和阶段2较低的速率开始，最后在阶段3保持非常低的恒定速率。冷凝区位于型材中蒸发区的正下方。在第1阶段和过渡阶段，蒸发和冷凝速率的两个峰值均迅速增加，在第2阶段下降，并在第3阶段保持恒定。蒸发区域的宽度在第1和第2阶段保持连续增加，并保持接近0.68的恒定值。在第3阶段cm处，当蒸发区域完全移入地下时，第2阶段末在蒸发区域上方形成了干燥表面层（DSL）。DSL的宽度在第2阶段也呈连续增加趋势，并保持恒定第三阶段的数值为0.71 cm

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