期刊名称：ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences
印刷版ISSN：2194-9042
电子版ISSN：2194-9050
出版年度：2005
卷号：XXXVI-4/W6
页码：131-136
出版社：Copernicus Publications
摘要：During the past two decades, law – permeability rocks have gained attention as potential natural barriers against the transport of pollutants from waste disposal sites. However, although the primary porosity and permeability of these rocks is extremely low, fractures, joints, and other discontinuities may form pathways for rapid water flow and solute migration, posing the threat of contaminant escape from waste sites and other potentially polluting facilities.These conduits, where active and interconnected, may transmit contaminants from land surface to groundwater at a much faster rate than the migration of contaminants through a permeable vadose zone. Moreover, small volumes of contaminated groundwater might spread over relatively large portions of the subsurface due to the small storage capacity of these discontinuities. The heterogeneity of these rocks – an almost impermeable matrix crossed by highly transmissive conduits – results in a complex structure with dual permeability , the exact spatial distribution of which is unknown
关键词：Fractured Chalk; Contamin; Ground Water; Fracture system; TV camera; Aliper
