Assessment of a fresh submarine groundwater discharge in eastern Jeju Island using analytic seawater intrusion models

Il-Hwan Kim; Sun Woo Chang

doi:10.3741/JKWRA.2022.55.12.1011

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2022 Vol.55, Issue 12 Preview Page Next Page

Research Article

Assessment of a fresh submarine groundwater discharge in eastern Jeju Island using analytic seawater intrusion models 해수침투 해석해 기반 제주 동부 담해저 지하수 유출의 정량적 산정

31 December 2022. pp. 1011-1020

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Abstract

Previous studies for the assessment of submarine groundwater discharge (SGD) were perfomed for areas where a large amount of SGD was observed. Newly developed assessment methods were proposed that was based on an analytic solution using sharp interface model. The proposed mathematical equations used the existing observed groundwater level and hydrogeological data of Jeju Island as input data. The quantitatively assessed FSGD values were compared to the basin-scale recharge estimation values in Seong-San area in eastern Jeju. As a result of the study, it was estimated that the amount of FSGD in the Seongsan area ranges from about 2.65 to 9.15% of the amount of areal-recharge. Through the analysis of the FSGD combined with the analytic model, it is to be provided as a scientific tool to establish a more reasonable coastal water resource management plan.

Keywords

Fresh submarine groundwater discharge

Sharp interface model

Analytical SWI solution

Eastern Jeju

기존 해저 지하수 유출의 진단은 국지적으로 많은 양의 해안 유출이 관측되는 곳을 대상으로 수행되었으며, 넓은 영역을 대상으로 해안선을 따라 유출되는 유역 규모의 해저 지하수 유출 진단은 지금까지 국내를 대상으로 연구되어온 적이 없다. 본 연구에서는 제주 동부 지역을 대상으로 해수 침투 진단 및 예측에서 널리 사용되는 해석학적 모형을 기반으로 해저 지하수 유출을 유역별 또는 지역적으로 분석할 수 있는 해저 지하수 유출 진단 모형을 개발하였다. 본 연구에서 연구 방법으로 제안하는 해저 지하수 유출 진단 모형은 이론적으로 개념화된 기존의 해수 침투 경계면 기반 해석식을 발전시켰다. 다수의 관측 지하수위 및 수리 지질학적 자료를 해석식의 입력값으로 활용하기 위해 고안되었으며, 유량 평균 유출 산정식과 단면 평균 유출 산정식으로 구분되는 담해저 지하수 유출량 산정 방법이다. 모형 개발을 위하여 해수 침투의 해석학적 모형의 개념 응용 및 수정, 기존에 보고된 제주 동부의 국지적 해저 지하수 유출 진단 결과를 활용한 보정 및 검증 등을 포함하는 연구를 수행하였다. 연구 결과 성산 유역의 담해저 지하수 유출은 함양량의 약 2.65%에서 9.15%에 이르는 것으로 추정되었다. 본 연구에서는 해석학적 해수침투 모델이 결합된 유역 규모의 해안 유출수의 정량적 평가를 최초로 확립함으로써 보다 합리적인 해안지역 수자원 관리 방안 수립에 대한 과학적 분석 방법 제공이 가능할 것으로 사료된다.

키워드

해안유출

제주 동부

경계면 모델

해석식

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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 : 55
No :12
Pages :1011-1020
Received Date : 2022-10-25
Revised Date : 2022-11-01
Accepted Date : 2022-11-02
DOI :https://doi.org/10.3741/JKWRA.2022.55.12.1011

Journal of Korea Water Resources Association ISSN:2799-8746(Print) 2799-8754(Online) 한국수자원학회 논문집

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