【作者】 吕美霞； 郝振纯； 刘震； 徐郡麟；

【机构】 河海大学水文水资源与水利工程科学国家重点实验室；

【摘要】 坡度是土壤水分侧向运动的重要影响因素,而以往的大多数分布式水文模型都未考虑坡度对土壤水分侧向运动的影响,对山坡水文过程缺乏具有物理机制的客观描述。因此,坡度对土壤水分再分配规律的影响研究,对提高分布式水文模型对水文过程的模拟和预测能力,完善分布式水文模型理论具有重要的理论和现实意义。本文采用Hydrus-2D软件对室内变坡土槽土壤水分的再分配过程进行了数值模拟和实验研究,从而证明了Hydrus-2D能够较好地模拟砂壤土斜坡土槽土壤水分运动,并且分析了土壤水分再分配规律,对不同坡度实验的退水过程进行了比较。更多还原

【Abstract】 For lateral movement of soil moisture,slope is the important factor.However,most of the distributed hydrological models do not consider slope’s influence on soil-moisture lateral movement.And they are in the lack of objective description of physical mechanism on the hill-slope hydrological processes.Therefore,experimental study of soil water redistribution with the slope is of important theoretical and practical significance,which can improve distributed hydrological models’ capabilities of simulation and prediction on hydrological process and improve distributed hydrological models theory.This paper conducted simulation of soil moisture redistribution process in the slope-variable soil tank,using Hydrus-2D software.Also,it analyzed the experimental data.At last,it concluded that Hydrus-2D could simulate soil water movement of the soil tank with slope well.Moreover,it revealed the water redistribution’s regulation,and compared moisture recession process under different slopes.更多还原