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在云冈石窟地区,大气降水的入渗不仅是地下水的补给来源,也是洞窟石壁表面水分的来源之一。夏季强降雨和春季融雪是研究区入渗水产生的重要途径。石窟山体包气带厚,入渗水需要经过多层介质才能补给地下水,以石窟围岩中发育的2组优势垂直裂隙为主要运移通道。采用多种方法进行综合分析,估算出降水入渗系数为2.6%～5.4%,平均入渗强度为10～20mm/a。
In the Yungang Grottoes area, the infiltration of atmospheric precipitation is not only a source of groundwater recharge, but also a source of moisture on the surface of cave walls. Heavy rainfall in summer and snowmelt in spring are important ways to infiltrate water in the study area. Grottoes mountain gas with a thick, infiltration of water through multiple media to be able to supply groundwater to the caves surrounding rock in the development of two groups of dominant vertical fissures as the main migration channel. Using a variety of methods for comprehensive analysis, estimated rainfall infiltration coefficient of 2.6% to 5.4%, the average infiltration intensity of 10 ~ 20mm / a.