FACTOR ANALYSIS OF GROUNDWATER SALINIZATION IN THE KUROBE RIVER ALLUVIAL FAN BY NUMERICAL EXPERIMENT

Abstract

 Groundwater is one of good quality and abundant water resources, which uses for living, agricultural and industrial water. However excessive pumping caused ground subsidence and groundwater salinization, it was actualized as a social problem. Kurobe River alluvial fan had confirmed the increasing trend of chloride ion concentration. This study clarifies factor of groundwater salinization and analysis effect by pumping restriction in “Sho-zu of Shimizu-an”. Factor of groundwater salinization is groundwater level lowering than sea level rise. “Sho-zu of Shimizu-an” supposed executing pumping restriction after 2011. As a result, “Sho-zu of Shimizu-an” stop groundwater salinization when it reduce 60 to 70%. “Sho-zu of Shimizu-an” exempt groundwater salinization when it reduce over 80 %.