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Long-Term Trend of Groundwater Recharge According to Urbanization

도시화에 의한 장기 지하수 함양량 변화

  • Received : 2010.03.10
  • Accepted : 2010.05.17
  • Published : 2010.06.30

Abstract

To solve a problem of water supply on urban areas, groundwater recharge has to be assessed not only for evaluating the possibility of groundwater development but also for identifying a sustainable aquifer system for water resource development. The assessment of groundwater recharge has been challenged since the land use has been changed constantly. In this study, the groundwater recharge and its ratio were assessed from 1961 to 2007 in Su-yeong-gu, Busan, South Korea by analyzing precipitation, land use, and soil characteristics. For land use analysis, the urbanization change was considered. The land use areas for the residential, agricultural, forest, pasture, bare soil, and water in 1975 occupy 18.6 %, 30.0%, 48.8%, 0.1%, 2.0%, and 0.5% of total area, respectively. The land use ratios were sharply changed from 1980 to 1985; the agricultural area was decreased to 18.3%, and the residential area was increased to 15.0%. From 1995 to 2000, the agricultural area was decreased to 5.5%, and the residential area was increased to 5.4%. The annual averages of precipitation, groundwater recharge, and its ratio were 1509.3 mm, 216.0 mm, and 14.3% respectively. The largest amount of the groundwater recharge showed in 1970 as 408.9 mm, comparing to 2138.1 mm of annual rainfall. Also, the greatest ratio of the groundwater recharge was 19.8% in 1984 with 1492.6 mm of annual rainfall. The lowest amount and ratio of the groundwater recharge were 71.9 mm and 8.0% in 1988, relative to 901.5 mm of annual precipitation. As a result, it is concluded that rainfall has increased, whereas groundwater recharge has decreased between 1961 and 2007.

Keywords

References

  1. 김남훈, 함세영, 김태용, 정재열, 안정훈, 전항탁, 김형수, 2008, 울산광역시 언양지역의 지하수 저류 변화량 산정 및 지질과의 관련성, 대한지질공학회지, 18(3), 263-276.
  2. 김용호, 이승현, 배상근, 2006, 도서지역 지하수해안유출량의 평가, 공동추계학술발표회논문집, 한국물환경학회, 1115-1118.
  3. 배상근, 2002, 지하수함양량 산정방법에 대한 고찰, 한국수자원학회지, 35(3), 50-59.
  4. 배상근, 이승현, 2004, 소유역의 강수에 의한 지하수함양량 산정, 한국수자원학회논문집, 37(5), 397-406.
  5. 배상근, 2005, 지하수함양량 산정을 위한 NRCS-CN방법의 적용성, 대한토목학회지, 25(6B), 425-430.
  6. 안정훈, 함세영, 이정환, 김남훈, 양대복, 황지광, 2008, 물수지 및 수리지질 분석을 통한 울산광역시 중괘천-보은천 지역의 지하수 함양량 산정, 대한자원환경지질학회지, 41(4), 427-442.
  7. 이승현, 배상근, 2004, SCS-CN방법을 이용한 평창강 유역의 강수 함양량 산정, 한국환경과학회지, 13(2), 1033-1040.
  8. 하규철, 박원배, 문덕철, 2009, 제주도 토지이용변화에 따른 직접유출량 변화 추정, 대한자원환경지질학회지, 42(4), 343-356.
  9. http://www.kma.go.kr/weather/observation/past_table.jsp.
  10. http://www.wamis.go.kr/main.aspx.