도시화에 따른 갑천유역의 지하 수문 특성 변화 분석

  • 김정곤 (한국수자원공사 수자원연구원) ;
  • 손경호 (한국수자원공사 수자원연구원) ;
  • 고익환 (한국수자원공사 수자원연구원)
  • Published : 2006.04.01

Abstract

The main purpose of this research was to investigate the effects of urbanization on the groundwater system in the Gap river basin, a sub-basin of the Geum river basin. In this analysis, we constructed a water cycle analysis system using SWAT. Then, changes in soil moisture and recharge rate due to land-use changes were investigated using different land-use data estimated in 1975 and 2000. Simulation results were analyzed for both draught (2001) and flood (2003) years to take into account different hydrologic conditions. It was shown that recharge rate in the most urbanized area (31% change) was reduced by 17% for both periods due to urbanization. The results also indicated that soil moisture decrease due to urbanization was more sensitive in the drought year (2001) than in the flood year (2003), We expect that the results of this research can contribute to providing useful information for managing urban rivers considering river restoration and flood control.

Keywords