不同膜孔直径的浑水膜孔灌单向交汇入渗特性  

Single-line Interference Infiltration Characteristics of Muddy Water Film Hole Irrigation of Different Film Hole Diameters

作　　者：王锦辉[1] 费良军[1] 

机构地区：[1]西安理工大学水利水电学院,西安710048

出　　处：《水土保持学报》2016年第1期184-188,195,共6页Journal of Soil and Water Conservation

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单向交汇入渗试验资料,研究了不同膜孔直径的浑水膜孔灌单向交汇入渗特性;建立了浑水膜孔灌单向交汇入渗参数、单向交汇时间、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单向交汇入渗单位膜孔面积累积入渗量模型、稳定入渗率模型、自由面和交汇面湿润锋运移模型。结果表明:随着膜孔直径增大,单点膜孔累积入渗量逐渐增大,单位膜孔面积累积入渗量逐渐减小;单位膜孔面积累积入渗量的K值随着膜孔直径的增大而减小,α随着膜孔直径的增大而逐渐增大;在膜孔间距一定的情况下,入渗发生交汇的时间随着膜孔直径的增大而减小;在相同入渗时间内,随着膜孔直径的增大,自由面和交汇面垂直和水平湿润锋运移距离都逐渐增加。According to single-line interference infiltration of muddy water film hole irrigation test data,this study investigated the single-line interference infiltration characteristics of muddy water film hole irrigation of different film hole diameters,established the relationships between single-line interference infiltration parameters of muddy water film hole irrigation,single-line interference time,wetting front movement parameters and film hole diameter,and put forward the model of cumulative infiltration volume per unit film hole area,steady infiltration rate model,and free surface and interference surface wetting front movement model,for single-line interference infiltration of muddy water film hole irrigation of different film hole diameters.The results showed that with the film hole diameter increased,the cumulative infiltration volume in single point of film hole increased gradually,while cumulative infiltration volume per unit film hole area and its K value decreased,andαshowed an opposite tendency.When the distance between film holes did not change,the interference time decreased with the increase of film hole diameter.In the same infiltration time,with the increase of film hole diameter,the vertical and horizontal wetting front movement distance in free surface and interference surface gradually increased.

关 键 词：膜孔直径 浑水膜孔灌 交汇入渗 单向交汇时间 交汇面 

分 类 号：S274.3[农业科学—农业水土工程]