不同膜孔直径的浑水膜孔灌自由入渗特性研究  

Free Infiltration Characteristics of Muddy Water Film Hole Irrigation with Different Film Hole Diameters

作　　者：费良军[1] 王锦辉[1] 金世杰[1] 

机构地区：[1]西安理工大学水利水电学院,西安710048

出　　处：《农业机械学报》2016年第2期172-178,共7页Transactions of the Chinese Society for Agricultural Machinery

基　　金：国家自然科学基金项目(51479161、51279157);公益性行业科研专项(201203003)

摘　　要：根据室内浑水膜孔灌自由入渗试验资料,对比分析了浑水与清水膜孔灌自由入渗的区别,研究了不同膜孔直径的浑水膜孔灌自由入渗特性及浑水膜孔灌自由入渗与浑水垂直一维入渗之间的关系;建立了浑水膜孔灌自由入渗参数、湿润锋运移参数与不同膜孔直径的关系;提出了不同膜孔直径的浑水膜孔灌自由入渗单位膜孔面积累积入渗量模型、稳定入渗率模型、单位膜孔面积侧渗量模型和湿润锋运移模型。结果表明,浑水膜孔灌自由入渗随着膜孔直径的增大,单点膜孔累积入渗量逐渐增大,单位膜孔面积累积入渗量和单位膜孔面积侧渗量逐渐减小;不同膜孔直径的浑水膜孔灌自由入渗单位膜孔面积累积入渗量的入渗系数K和入渗指数α都随着膜孔直径的增大而减小,单位膜孔面积侧渗量的入渗系数Kc随着膜孔直径的增大而减小,侧渗量入渗指数αc随着膜孔直径的增大而增大;在相同入渗时间内,随着膜孔直径的增大,垂直和水平湿润锋运移距离都逐渐增加。According to indoor free infiltration of muddy water film hole irrigation test data and free infiltration of clean water film hole irrigation as contrast,the free infiltration characteristics of muddy water film hole irrigation with different film hole diameters were investigated,the relationships between muddy water film hole irrigation infiltration and vertical one-dimensional muddy water infiltration was studied,the relationships between free infiltration of muddy water film hole infiltration parameters,wetting front movement parameters and different film hole diameters were established,and the cumulative infiltration volume model per unit film hole area of free infiltration of muddy water film hole irrigation with different film hole diameters,side infiltration volume model per unit film hole area,steady infiltration rate and wetting front movement model were put forward. The results showed that with the increase of film hole diameter of free infiltration for muddy water,the cumulative infiltration volume of single point of film hole was increased gradually,cumulative infiltration volume per unit film hole area and side infiltration volume per unit film hole area were decreased,the fitting parameters of K and α for cumulative infiltration volume per unit film hole area were decreased,and Kcof side infiltration volume per unit film hole area was decreased,while αcwas increased. Within the same infiltration time,vertical and horizontal wetting front movement distances were gradually increased with the increase of film hole diameter.

关 键 词：膜孔直径 浑水膜孔灌 自由入渗 垂直一维入渗 侧渗量 

分 类 号：S274.3[农业科学—农业水土工程]