6:15 PM - 7:30 PM
[AHW24-P03] Effects of mountainous water recharge to groundwater quality of alluvial fan
Keywords:Groundwater recharge, Alluvial fan, Isotopes, End-member mixing analysis, Mountainous water resource
The study area is Midaigawa alluvial fan, located in western Kofu basin on central Japan, which is formed by Raised-bed River discharged from the mountain watershed.
The groundwater samples were collected from 25 deep wells (100~300m) in June-2010, Novenber-2011 and Novenber-2012. Those wells were located on Midaigawa alluvial fan and adjacent mountain. Four End-member mixing analysis using isotope value and chemical compositions revealed spatial variation in the contribution ratios for various groundwater sources. This presentation focused on groundwater recharge from mountain area to alluvial fan. It also found the relationship between contributions of mountainous water on groundwater and chemical composition.
This study was supported by the Kurita water and environment Foundation (No.14B063).