一维水平红壤水分入渗特征与Green-Ampt模型的应用  

One-dimensional Horizontal Infiltration Characteristics and the Application of the Green-Ampt Model

作　　者：卢霞[1] 姚帮松[1] 王辉[1,2] 

机构地区：[1]湖南农业大学工学院,长沙410128 [2]中国科学院水利部水土保持研究所黄土高原土壤侵蚀与旱地农业国家重点实验室,陕西杨凌712100

出　　处：《中国农村水利水电》2009年第10期72-75,共4页China Rural Water and Hydropower

基　　金：国家自然科学基金(40801107);湖南省教育厅科学基金(07B033);湖南农业大学人才基金(06YJ28)共同资助

摘　　要：根据Green-Ampt模型结构上的特点,将活塞模型假定应用到一维水平入渗,利用水量平衡原理建立入渗过程累积入渗量、湿润锋位移、入渗率与入渗时间之间的关系。通过室内水平土柱入渗试验,获得两种质地红壤水平入渗试验资料,从而验证一维水平红壤水分入渗各参量的定量关系,并分析了模型的计算结果与实际测定的入渗资料间的误差,结果表明Green-Ampt模型可较好地描述一维水平入渗过程,但仍需进一步修正和改进。According to the characteristics of Green-Ampt model＇s structure, the piston assumption of Green-Ampt model is applied to one-dimensional horizontal infiltration in this paper. Using the theory of water-mass balance, relations of parameters among cumulative infiltration volume, wetting front distance, infiltration time and infiltration rate are ascertained. The infiltration data of two kinds of red soils are got through indoor horizontal soil column experiments, and quantitative relations among every parameters in horizontal infiltration are also validated. Besides, the error between computerized results by Green-Ampt model and measured experiment results are analyzed. The results show that Green-Ampt model can describe one-dimensional horizontal infiltration preferably, but it will need further correction and improvement in application.

关 键 词：GREEN-AMPT模型 水平入渗 模拟模型 红壤 

分 类 号：S152.7[农业科学—土壤学]