网格尺度上宁夏平原区土壤水分入渗模型  

Soil Water Infiltration Model of the Grid Scale in Ningxia Plains

作　　者：李丽梅[1] 胡华[1] 

机构地区：[1]宁夏大学数学计算机学院,银川750021

出　　处：《中国农村水利水电》2015年第11期16-19,23,共5页China Rural Water and Hydropower

基　　金：宁夏自然科学基金重点项目(NZ13008)

摘　　要：结合宁夏平原区的土壤特性,为准确模拟土壤水分入渗过程,通过Green-Ampt模型计算入渗量,发现直接计算的累计入渗量与实测值相差较远,为使得该模型能准确描述宁夏平原区土壤水分入渗,首先将Green-Ampt模型分时段进行描述,继而再对第二时段分层表示,得到最终的分层分时段Green-Ampt模型,通过网格尺度上的野外实测以及实验模拟,经该方法修正的计算值与实测值吻合较好,证明该方法能有效的模拟宁夏平原区土壤水分入渗过程。Combination of Ningxia plains soil properties, soil water infiltration process through calculating infiltration amount of Green-Ampt model for accurate simulation, found that calculated cumulative infiltration amount and the measured values has the greatest error. To make the model can accurately describe the soil water infiltration in Ningxia plains. First Green-Ampt model was described in two stages, then for the second-stage layer, to get the final layer and staged Green - Ampt model, through field survey and experimental simulation, the correction of the method calculated values and measured values are in good agreement, prove that the method can effectively simulate soil water infiltration process in Ningxia plains.

关 键 词：分层分时段Green-Ampt模型 积水入渗 湿润锋 入渗率 累计入渗率 

分 类 号：S152.7[农业科学—土壤学] S11[农业科学—农业基础科学]