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【目的】研究干旱农业区采用覆膜滴灌技术,在无覆膜的膜间裸露区内设置排盐沟条件下,覆膜滴灌土壤盐分运移和排盐沟表面排盐效果。【方法】利用hydrus-2D模型模拟研究该条件下二维土壤入渗湿润峰变化。【结果】滴头以下部位形成盐分淡化区域;排盐沟表面受蒸发影响呈现盐分累积现象。【结论】膜下滴灌排盐沟效果明显,排盐沟斜面积盐现象显著,该模型可以较好的模拟二维土壤入渗湿润峰变化。
【Objective】 The purpose of this study was to study the effects of plastic film drip irrigation with drip irrigation on the surface salt drainage of salt sprayed ditch under the conditions of drip irrigation ditch. 【Method】 The hydrus-2D model was used to simulate the change of two-dimensional soil infiltration wetting peak under this condition. 【Result】 The salt water desalination area was formed in the area below the dripper. Salt accumulation in the surface of the salt ditch was affected by the evaporation. 【Conclusion】 The results show that the effect of drip irrigation ditch under the film is obvious, and the phenomenon of slope area salinities is obvious. The model can simulate the change of two-dimensional soil infiltration wetting.