水利水电技术2013，Vol.44Issue(2)：138-140,3.
积水动边界条件下滴灌土壤水分入渗研究(Ⅰ)——室内试验
Numerical simulation on water infiltration law of drip-irrigated soil under dynamic boundary condition of surface ponding (Ⅰ) : Lab-experiment
摘要
Abstract
To better guide the engineering practice of drip irrigation, the soil water infiltration law under the dynamic boundary condition of surface ponding induced by drip irrigation is systematically studied herein for the phenomenon of the surface ponding.Through the lab-experiment concerned, the wetted body of soil, wetting front of soil water infiltration and surface ponding area of the drip irrigation with various flow rates under the condition of surface ponding are tested and analyzed.The result shows that the drip irrigation wetting body looks like the pattern of a horizontal semi-ellipsoid within a long period after irrigation under the dynamic boundary condition of surface ponding.Furthermore, whether the horizontal wetting front, vertical wetting front and wetting ratio or the surface ponding area are all better coincided with the power function relationship with the infiltration time.Moreover, whether the emitter flow-rate is large or small, the wetting ratio is all along to be gradually decreased with the increase of the irrigation duration, but all are to be larger than 1.The emitter flow-rate has a great impact on the area of the surface ponding, and then both the surface ponding area and the time when it is stabilized are increased with the increment of the emitter flow-rate.Simultaneously, the stabilized area of the surface ponding and the emitter flow-rate can be better coincided with the power function relationship as well.关键词
滴灌/地表积水/充分供水/滴头流量/湿润锋Key words
drip irrigation/ surface ponding/ sufficient water supply/ emitter flow-rate/ wetting front分类
农业科技引用本文复制引用
李道西,代小平,冯江,雷宏军,柴红敏..积水动边界条件下滴灌土壤水分入渗研究(Ⅰ)——室内试验[J].水利水电技术,2013,44(2):138-140,3.基金项目
华北水利水电学院高层次人才科研启动项目(001188). （001188）
