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2018 Vol.51, Issue 6 Preview Page
Analysis of the effects of the seawater intrusion countermeasures considering future sea level rise in Yeosu region using SEAWAT

SEAWAT을 이용한 미래 해수면 상승에 따른 여수지역 해수침투 저감 대책 효과 분석

Jeong-Seok Yanga*
,
Jae-Beom Leea
,
Il-Hwan Kima
양 정석a*
,
이 재범a
,
김 일환a
aSchool of Civil and Environmental Engineering, Kookmin University
a국민대학교 건설시스템공학부
*교신저자. *Corresponding Author. 
30 June 2018. pp. 515-521
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Abstract

Seawater intrusion areas were calculated in Yeosu region considering sea level rise and the effects of countermeasures for seawater intrusion were analyzed using SEAWAT program. The estimated seawater intrusion area was 14.90 km2in 2015. When we applied climate change scenarios the area was changed to 19.19 km2 for RCP 4.5 and 20.43 km2 for RCP 8.5 respectively. The mitigation effects by artificial recharge with total 50 m3/d, 100 m3/d, and 300 m3/d are from 3.75% to 10.68% for RCP 4.5, and from 5.82% to 10.77% for RCP 8.5 respectively. If we install barrier wall with the thickness 0.8 m, 1.3 m, and 1.8 m, the mitigation effects are from 6.67% to 12.04% for RCP 4.5, and from 6.17% to 14.98% for RCP 8.5 respectively. The results of this study can be used to be a logical means of quantitative grounds for policy decisions to prevent groundwater contamination by seawater intrusion and subsequent secondary damage in coastal areas.

Keywords
Seawater intrusion
SEAWAT
Sea level rise
Yeosu

연구에서는 SEAWAT을 이용하여 여수지역의 해수침투 피해 면적을 파악하고, 기후변화 시나리오 적용에 따른 미래의 해수침투 피해 예상 면 적을 산출하였으며 해수침투 피해 저감 대책의 피해면적 저감 능력을 분석하였다. 2015년 기준 여수지역의 해수침투 피해 면적은 14.90 km2로 나타났고, 기후변화 시나리오를 적용하였을 때 2099년 여수지역의 예상 해수침투 피해 면적은 RCP 4.5의 경우 19.19 km2이며, RCP 8.5의 경우 20.43 km2로 나타났다. 이에 대한 저감대책으로 인공함양을 고려하였을 때, 총 300 m3 /d, 100 m3/d, 50 m3/d의 함양 시나리오를 설정하였을 때 RCP 4.5의 경우 해수침투 면적은 평균 7.03%, RCP 8.5의 경우 8.32% 감소하였다. 물리적 차수벽 대책의 경우는 차수벽의 두께를 0.8 m, 1.3 m, 1.8 m 로 설정하였을 때 RCP 4.5의 경우 해수침투 면적은 평균 9.80%, RCP 8.5의 경우 10.30% 감소하였다. 본 연구는 연안지역의 해 수에 의한 지하수 오염과 그에 수반한 2차적인 피해를 막기 위한 대비책을 결정하기 위한 정량적인 근거로서 사용될 수 있을 것으로 기대된다.

키워드
해수침투
SEAWAT
해수면 상승
여수 지역
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Information
  • Publisher :KOREA WATER RESOURECES ASSOCIATION
  • Publisher(Ko) :한국수자원학회
  • Journal Title :Journal of Korea Water Resources Association
  • Journal Title(Ko) :한국수자원학회 논문집
  • Volume : 51
  • No :6
  • Pages :515-521
  • Received Date : 2018-03-05
  • Revised Date : 2018-03-19
  • Accepted Date : 2018-03-19
  • DOI :https://doi.org/10.3741/JKWRA.2018.51.6.515
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