제주도 성산유역의 지하수 유동 및 함양에 따른 수리특성

Abstract

Depth of low permeability layer confirmed and applied to MODFLOW program for analyzing hydraulic characteristics of Jeju-do Seongsan Basin according to flow and groundwater recharge. The simulation result on numerical analysis is as follows. Depth of low permeability layer in Jeju-do is 180.0m~-140.0m from sea level, and depth of low permeability layer in Seongsan Basin is relatively deep at -43.8m~-117.5m. As a result of simulating waterfront boundary adjacent to Seongsan Basin as no-flow during application of MODFLOW model, error between observed water level and calculated water level was -0.26~0.62m. Error was reduced to -0.29~0.36m when flow of water set to north of Seongsan Basin. Characteristics of groundwater level were simulated after applying groundwater recharge data for 2003∼2009, and large error was found in groundwater level of observation wells distributed nearby Pyoseon Basin. Mean hydraulic conductivity was computed as 3.34×10-3m/sec according to groundwater recharge.