非饱和土壤中指流的研究进展

Review on the study of finger flow in unsaturated soil

指流是土壤中普遍存在的一种水分和溶质运移形式,土壤中发生的指流现象将导致水分和溶质快速向下迁移,从而引起深层土壤和地下水的污染以及水分和养分的流失。因此,掌握其研究动态并对其进行深入研究很有现实意义。针对指流的实际情况,从非饱和土壤中指流的试验方法、机理研究和模型预测等方面,综合评述了国内外的研究动态,并探讨了目前存在的问题和发展前景。

Finger flow often occurs when water and solute transport in unsaturated soil.This will result in increasing contaminant for deeper soil and groundwater and exceed leaching of nutrient.The paper reviews and summarizes the studies home and abroad in experiment methods,origination mechanism,modeling and application,and points out the existing problem of recent researches and it's progress in the future.