论文部分内容阅读
采用正交试验方法,探讨了不同埋深、孔径、孔距、防堵套长度的简易地下滴灌在定压供水条件下渗水量、管道水压分布和土壤水分入渗规律。结果表明,滴水管的出水量随时间呈幂函数下降,单孔出水量随孔径和孔距的增大而显著增大;地下滴灌的灌水均匀度随孔径的增大、孔距的减小而降低;地下滴灌的土壤入渗宽度随孔径的增大、孔距的减小、埋深的减小而增大,入渗深度则相反;对渭北旱塬地区,现行的果树简易地下滴灌的管道埋深、孔径、孔距应分别为40cm,0.9mm,60～80cm。
Using orthogonal test method, the infiltration quantity, water pressure distribution and infiltration rule of soil under different subsurface drip irrigation under constant pressure were discussed under different depth, pore size, hole distance and length of plugging prevention. The results showed that the water discharge of the drip pipe decreased with the power exponentially, and the water output of single hole increased with the increase of the hole diameter and the hole distance. The uniformity of drip irrigation increased with the increase of the hole diameter and the decrease of the hole distance And the infiltration depth of underground drip irrigation increased with the increase of pore diameter and pore distance and the decrease of burial depth, Pipeline depth, aperture, hole spacing should be 40cm, 0.9mm, 60 ~ 80cm.