一维土壤入渗特性数值模拟  

Numerical Simulation of One-dimensional Soil Infiltration Characteristic

作　　者：聂卫波[1] 马孝义[1] 王术礼[1] 

机构地区：[1]西北农林科技大学旱区农业水土工程教育部重点实验室,陕西杨凌712100

出　　处：《灌溉排水学报》2009年第3期53-57,共5页Journal of Irrigation and Drainage

基　　金：国家自然科学基金项目(50479052);国家科技支撑计划项目(2006BAD11B04);西北农林科技大学青年学术骨干计划项目

摘　　要：以非饱和土壤水分运动理论基础,利用Richards模型模拟不同实验处理下的一维垂直入渗过程,采用SWMS-1D软件对模型求解,用试验资料对模拟的累积入渗量与湿润锋运移距离结果进行了对比验证,二者基本吻合。对模拟结果分析得出,土壤质地和容重对一维垂直入渗累积入渗量、入渗速率和湿润锋运移距离影响较大,土壤初始含水率和入渗水头对其影响较小;并分别建立了不同土壤质地下的累积入渗量、入渗速率和湿润锋运移距离与入渗历时单参数幂函数计算式。Based on unsaturated soil water movement theory, Richards equation be resolved with SWMS- 1D software for simulating one-dimensional （1D） soil infiltration under different experiment initial condition. The simulation results of accumulation infiltration quantity and wetting soil movement migration dis- tance were verified by laboratory experiments and it＇s agreed well with measurement values. It shown that the Richards equation can be studied infiltration characteristic of 1D vertical infiltration. The simulation results was analyzed, it found that the soil texture and soil density have obvious effects on infiltration characteristic of 1D vertical infiltration, the water depth and soil moisture initial content have slight effect on in- filtration characteristic, and established the different single parameter power function formula between accumulation infiltration quantity, infiltration speed and wetting soil movement migration distance with infiltration time.

关 键 词：一维垂直入渗 入渗特性 数值模拟 模型 

分 类 号：S152.7[农业科学—土壤学]