The changes of soil moisture and shallow groundwater level on dry land are simulated by using one-dimensional vertical saturated-unsaturated equations of motion and supplemented by the models of soil evaporation and evapotranspiration, soil infiltration and underground runoff. Taking a typical plain area with shallow groundwater table and being significantly affected by rainfall as study area, the measured data of soil moisture observation instrument, groundwater level observation wells and rainfall evaporation observation stations are used to simulate the hydrology process of test area by above models. The simulation results are compared with actual observation data and the results show that the model can well reflect the change process of soil moisture and groundwater level test area.%采用一维垂向饱和-非饱和运动方程研究模拟土壤水分变化和浅层地下水位的起伏，并辅以土壤蒸发、土壤下渗、地下径流等模型。选取地下水位埋深浅，且受降雨影响明显的典型平原区旱地作为研究区，采用土壤水分观测仪、地下水位观测井以及降雨蒸发观测站联合对试验区水文过程进行观测，尝试提出具有较强物理意义的平原区产流模型。模型计算结果与试验区观测结果对比显示，模型能较好地反映试验区土壤水分及地下水位变化过程。
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