Experimental studies for identifying the impacts of sea-level rise caused by global warming on groundwater environment in areas below sea- level

概要

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According to IPCC, global warming may b ring about rise in mean sea-level by 9cm - 88cm at the end of 21<SUP>st</SUP> century. Because the Japanese archipelago is surrounded by sea and important socioeconomic activities concentrate in areas below sea-level, it is prerequisite to predict influences of sea-level rise on groundwater systems in coastal aquifers. By conducting laboratory experiments, impacts of sea-level rise on coastal groundwater systems were investigated together with the effect of conservative measures. These experiments are specially characterized by the domain of glassbeads with inclined surface, which allows surfacial ponding of water and installation of an impermeable barrier in the domain to set back salt water intrusion. By these experiments, it is revealed that the sea-level rise causes acceleration of salt-water intrusion in coastal aquifers and inundation of low-lying areas, and that impermeable barriers are effective for preventing salt water intrusion but at the expense of inundation.
Japanese Association of Groundwater Hydrologyの論文