膜孔灌平均入渗水深简化计算模型建立与验证  

Simplified Infiltration Model of Film Hole Irrigation and Its Validation

作　　者：马孝义[1] 范严伟[1,2] 王术礼[1] 孙秀娟[1] 王波雷[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 [2]兰州理工大学流体动力与控制学院,兰州730050

出　　处：《农业机械学报》2009年第8期67-73,共7页Transactions of the Chinese Society for Agricultural Machinery

基　　金：国家自然科学基金资助项目(50879072;50479052);"十一五"国家科技支撑计划资助项目(2006BAD11B04);国家"863"高技术研究发展计划资助项目(2006AA100209)

摘　　要：以非饱和土壤水分运动理论为基础,研究了膜孔灌土壤水分运动的数学模型,并用SWMS-3D软件对多种典型土壤的膜孔灌入渗特性进行模拟,利用模拟结果分析了膜孔灌入渗特性及其影响因素,提出了包含开孔率、膜孔直径的膜孔灌点源平均入渗水深简化模型。采用多种土壤膜孔灌入渗室内试验结果与已有文献资料对所建模型进行验证,结果表明所建模型能较准确地反映膜孔灌点源入渗特性,可为确定合理的膜孔灌灌水技术要素组合提供理论依据。Based on the theory for water movement in non-saturated soil, the mathematical model of film hole irrigation was developed to describe soil water movement, and the simulation was performed by using SWMS - 3D software. According to the simulated results, the characteristics and infecting factors of infiltration of film hole irrigation was analyzed, and the simplified film hole infiltration model including the opening hole ratio and the film hole diameter was presented. The model was verified by infiltration experiments at several typical soils condition and other researcher＇s experiment results. It was showed that the model is simple and credible with less parameters, which can been using for deciding reasonable technological elements of film hole irrigation water to improve irrigation water quality.

关 键 词：膜孔灌 入渗速率 简化模型 开孔率 膜孔直径 数值模拟 

分 类 号：S275.5[农业科学—农业水土工程]