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进行人工补给地下水设计中出现的一个难题是预测含水层阻塞问题。本文从理论与实践方面讨论了补给水中悬浮固体物质阻塞含水层的机理以及反抽水时含水层渗透性恢复效应。文章得出下列结论: 1.阻塞现象可比拟为渗滤平衡; 2.悬浮固体物质总量与渗透性降低间的关系,可以用柯兹恩-斯坦公式表示; 3.假定水流通过毛细管,可以对反抽效应做出定量评价。反抽效应依附于砂粒间水流引起的剪切应力的大小发生变化。
One of the difficulties in designing artificial recharge groundwater is to predict aquifer clogging. This paper discusses the mechanism of clogging of the aquifer with suspended solids in make-up water and the recovery effect of permeability of aquifer during backwater pumping. The article draws the following conclusions: 1. Obstruction is comparable to the balance of percolation; 2. The relationship between the total amount of suspended solids and the decrease in permeability can be expressed using the Kozin-Stein formula; 3. Assume that the water flow through the capillary can be A quantitative assessment of the effect of back extraction. The effect of back pumping depends on the magnitude of the shear stress caused by the inter-grit water flow.