降雨入渗补给量计算的数值模拟方法  

Numerical Simulation Method for Calculation of Precipitation Recharge

作　　者：张志才[1] 陈喜[1] 

机构地区：[1]河海大学水文水资源与水利工程科学国家重点实验室,南京210098

出　　处：《中国农村水利水电》2007年第12期1-4,8,共5页China Rural Water and Hydropower

基　　金：国家自然科学基金资助项目(50679025);教育部新世纪优秀人才支持计划资助项目(NCET-04-0492)

摘　　要：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.

关 键 词：降雨入渗补给 土壤水运动 零通量面 大孔隙 数值模型 

分 类 号：S275.4[农业科学—农业水土工程]