浑水膜孔灌多向交汇入渗湿润体特征数值研究  

Numerical Study on the Characteristics of Multi-point Interference Infiltration Wetted Body in Muddy Water Film Hole Irrigation

作　　者：姜瑞瑞 费良军[1,2] 康守旋 JIANG Ruirui;FEI Liangjun;KANG Shouxuan(State Key Laboratory of Eco-hydraulics Arid Region, Xi’an University of Technology, Xi’an 710048;Institute of Water Resources and Hydro-electric Engineering, Xi’an University of Technology, Xi’an 710048)

机构地区：[1]西安理工大学省部共建西北旱区生态水利国家重点实验室,西安710048 [2]西安理工大学水利水电学院,西安710048

出　　处：《水土保持学报》2022年第4期190-195,共6页Journal of Soil and Water Conservation

基　　金：国家自然科学基金项目(5177920,52079105);陕西水利科技项目(2021slkj-17)。

摘　　要：为了研究浑水膜孔灌不同膜孔直径对多点源交汇入渗湿润体特征的影响,设置4种不同大小的膜孔直径,通过室内试验,在膜孔灌入渗方式下,测量不同膜孔直径多向交汇湿润体特征的变化过程。结果表明:膜孔直径越大,相同入渗时间内水平和垂直湿润锋运移距离越大;自由入渗剖面,水平和垂直湿润锋运移距离均与入渗时间符合幂函数模型,运移参数随膜孔直径的增大而增大,运移指数则减小;交汇剖面水平和垂直湿润锋运移距离与入渗时间符合对数函数模型;随着膜孔直径的增大,膜孔周围土壤含水率均接近土壤饱和含水率,其他相同位置土壤含水率增大,发生单向交汇和多向交汇的时间逐渐减小;浑水膜孔灌湿润体内灌水均匀系数均大于90%,灌水均匀度非常高。The objective of this study was to explore the effect of different film hole diameters on the characteristics of multi-point interference infiltration wetting body,a testing program of laboratory experiment with four different film hole diameters was designed,the changes in the characteristics of the wetting body with time under different film hole diameters were measured.The results showed that at the same time,the larger the film hole diameters,the greater the horizontal and vertical wetting front transport distance.The power function model was suitable for characterizing the relationship between the horizontal and vertical wetting front transport distance on the free infiltration surface and the time of infiltration.As the diameter of the film hole increased,the transport parameters gradually increased and the transport indexes gradually decreased.The relationship between the horizontal and vertical wetting front transport distance and the infiltration time were logarithmic function model on the intersection profile.As the diameter of the film hole increased,the soil moisture content around the film hole was close to the saturated,and the soil moisture content at the same location increased,and the time of unidirectional and multidirectional interference to occur gradually decreased.The irrigation uniformity coefficient in the wetting body of muddy water with film hole irrigation was greater than 90%,and the irrigation uniformity was very high.

关 键 词：浑水膜孔灌 多向交汇入渗 湿润体 膜孔直径 

分 类 号：S275.3[农业科学—农业水土工程]