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由不同质地土壤的点源入渗实验 ,得出了在不同滴头流量情况下 ,实际滴灌可以形成两种入渗边界 ,边界一是非充分供水点源入渗边界 ;边界二为变边界积水点源入渗边界 .本文对两种边界条件特点及其滴头流量、灌水时间、湿润锋、含水量分布等之间的关系进行了分析 ,认为湿润比可以作为确定滴灌灌水参数的指标之一 ,对于实验滴灌的适宜湿润比以小于 1 0为宜
According to the experiment of point source infiltration in soils with different textures, it is concluded that under different dripper flow rates, two kinds of infiltration boundaries can be formed by actual drip irrigation. The boundary is infiltrated boundary with inadequate water supply point. Point source infiltration boundary.This paper analyzed the relationship between the two boundary conditions and the characteristics of dripper flow, irrigation time, wetting front, water content distribution, etc. The wet ratio can be used as one of the indicators to determine drip irrigation parameters , For the experimental drip irrigation appropriate than less than 1 0 is appropriate