KSCE Journal of Civil and Environmental Engineering Research (대한토목학회논문집)

Korean Society of Civil Engeneers (대한토목학회)
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Analysis of Groundwater Recharge in Anseong River Basin under Urbanization and Future Climate Change

도시화 및 기후변화에 의한 안성천 유역의 지하수 함양량 변화 분석

  • Woo, Soyoung (Korea institute of Civil Engineering and Building Technology) ;
  • Kim, Wonjin (Korea institute of Civil Engineering and Building Technology) ;
  • Chang, Sunwoo (Korea institute of Civil Engineering and Building Technology) ;
  • Choi, Sijung (Korea institute of Civil Engineering and Building Technology) ;
  • Kim, Chul-Gyum (Korea institute of Civil Engineering and Building Technology)
  • 우소영 (한국건설기술연구원) ;
  • 김원진 (한국건설기술연구원) ;
  • 장선우 (한국건설기술연구원) ;
  • 최시중 (한국건설기술연구원) ;
  • 김철겸 (한국건설기술연구원)
  • Received : 2024.05.27
  • Accepted : 2024.06.18
  • Published : 2024.08.01
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Abstract

This study analyzed changes in groundwater recharge due to urbanization and future climate change using the SWAT hydrological model in the Anseong river basin (1,647 km2) adjacent to the west sea of Korea. The urbanization scenario was constructed based on increasing urban density and expansion, resulting in a decrease in groundwater recharge and recharge rate by 19.9 mm and 1.77 %, respectively. Future climate change scenarios were simulated using two models representing extreme rainfall and drought, with the drought model indicating that maintaining an average recharge rate of 21.6 % would be challenging. Results from the combined scenario of urbanization and extreme drought suggest that groundwater recharge during the spring season in urban areas would be most significantly affected.

본 연구는 서해안에 인접한 안성천 유역(1,647 km2)을 대상으로 수문모델 SWAT을 이용하여 도시화 및 미래 기후변화에 의한 지하수 함양량의 변화를 분석하였다. 도시화 시나리오는 도시 밀도의 증가와 도시의 확장을 이용하여 구축하였으며, 그 결과 도시화로 인해 지하수 함양량 및 함양률이 각각 19.9 mm, 1.77 % 감소하는 것으로 분석되었다. 미래 기후변화 시나리오는 극한 강우 및 극한 가뭄을 대표하는 두 개의 모델을 이용하여 모의하였으며, 극한 가뭄 모델에서는 평균 함양률이 21.6 %를 유지하기 어려울 것으로 분석되었다. 도시화와 극한 가뭄이 동시에 발생하는 복합시나리오의 결과, 도시지역의 봄철 지하수 함양량이 가장 큰 영향을 받을 것으로 전망되었다.

Keywords

Acknowledgement

This research was supported by a grant from the Development Program of Minimizing of Climate Change Impact Technology funded through the National Research Foundation of Korea (NRF) of the Korean government (Ministry of Science and ICT, Grant No. NRF-2020M3H5A1080735), and the KICT Research Program (project no.20240158-001, Development of coastal groundwater management solution) funded by the Ministry of Science and ICT.

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