多孔介质中指流的研究综述及展望

Research of Finger Flow in Porous Media:Review and Perspective

指流是土壤中普遍存在的一种水分和溶质运移形式,指流的研究对土壤水分调节、灌溉方式的确定、土壤及地下水污染预测、污染物迁移过程模拟及生态环境保护等具有重要影响。本文根据国内外指流的研究现状,从指流的发生条件、产生机理、量化判据、侧向扩散、影响因素以及数学模型等方面对指流研究已取得的主要成果进行综述和简评,以期为进一步的深入研究提供参考。

Finger flow is a form of water and solute transport occurring commonly in field soils. Research of finger flow is of great significance in a number of fields, such as soil water management, determination of irrigation and drainage patterns, prediction of soil and groundwater pollution, simulation of transport process of contaminants, and environment protection. Based on the information available about researches on finger flow that have been carried out both at home and abroad, major findings in the aspects of conditions and mechanism of fingering, quantitative criteria for onset of instability, attributing factors, lateral expansion of fingers, and modeling, were reviewd and commented. It is expected that this summary may be used as a step stone for further study in this area.