基于土壤水运动的物理过程,提出了降雨入渗补给地下水的计算模型。该模型以超渗产流和蓄满产流的混合产流模式计算地表产流量,以双层土壤蒸发模式和植物蒸散发机制计算蒸散发量,并在考虑大孔隙对土壤水运动影响的基础上,采用一维土壤水运动分层计算模型模拟土壤水运动。利用零通量面法确定非饱和土壤渗透系数、土壤水分率定模型其他参数。利用江苏徐州汉王水文试验站蒸渗仪实测资料对模型计算的入渗补给量进行了检验,结果表明,模型可以较好地模拟以土壤水运动为核心的水文过程及降雨入渗补给量。
Based on the physical process of soil water transfer, a calculated model estimating the precipitation recharge is proposed. Unsaturated-zone hydraulic conductivity is determined from ZFP method. The mixed runoff model is used to estimate surface runoff, and the mixed models of soil water evaporation from shallow soil layer and lower soil layer and plant evapo-transpiration are applied to calculate evapo-transpiration in this study. One dimensional hierarchical soil water movement model is used to simulate soil water transfer, and model parameters are calibrated using zero flux plane method. Meanwhile macro-pore flow is considered in the model. This hydrological model is examined by the observation data of the Hanwang Hydrological Experiment Station, Jiangsu province. The results show that the model can simulate the hydrological process cored with soil water movement and estimate the precipitation recharge.