• 지질공학
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• 제27권1호
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• pp.1-7
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• 2017

해안지역에서 지하수의 전기전도도, 화학적 지시자, 동위원소 조성을 이용하여 해수침투를 평가하였다. 전기전도도가 $3,000{\mu}S/cm$ 보다 높은 지역을 해수의 영향을 받은 지역으로 평가할 수는 있지만 다른 오염원과 해수침투를 구분하는 것이 매우 어렵다. 화학적 지시자 및 산소와 수소 동위원소 조성은 해수침투의 영향을 정량적으로 평가할 수 있지만 비용이 많이 드는 단점이 있다. 따라서 전기전도도를 이용하여 1차적으로 해수침투 가능성을 평가하고 해수침투의 영향을 받은 것으로 분류된 지역에 대해서 추가적인 화학 및 동위원소 분석을 수행함으로써 해수침투의 영향 정량적으로 평가하는데 소요되는 비용을 줄일 수 있으며 이러한 분석방법을 통해 해수침투 평가방법의 효율성을 향상시킬 수 있다.

• 한국지하수토양환경학회:학술대회논문집
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• 한국지하수토양환경학회 2002년도 총회 및 춘계학술발표회
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• pp.148-154
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• 2002

Groundwater Dam is one of the reliable techniques to get huge amount of groundwater abstraction for municipal, agricultural, drinking, industrial water supply system. It can be a major technique to solve water shortage problems when it based on the sufficient watershed, proper topology, and adequate aquifer distribution and pollution control. It is suggested that the two consecutive underground wall in the coastal area to prevent seawater intrusion beneath a single wall.

• 대한원격탐사학회:학술대회논문집
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• 대한원격탐사학회 2006년도 Proceedings of ISRS 2006 PORSEC Volume II
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• pp.989-992
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• 2006

The new approach to the problem of oil spill detection consisting in combined use of all available quasiconcurrent satellite information (AVHRR NOAA, TOPEX/Poseidon, Jason-1, MODIS Terra/Aqua, QuikSCAT) is suggested. We present the results of the application of the proposed approach to the operational monitoring of seawater condition and pollution in the coastal zone of northeastern Black Sea conducted in 2006. This monitoring is based on daily receiving, processing and analysis of data different in nature (microwave radar images, optical and infrared data), resolution and surface coverage. These data allow us to retrieve information on seawater pollution, sea surface and air-sea boundary layer conditions, seawater temperature and suspended matter distributions, chlorophyll a concentration, mesoscale water dynamics, near-surface wind and surface wave fields. The focus is on coastal seawater circulation mechanisms and their impact on the evolution of pollutants.

• 한국지하수토양환경학회지:지하수토양환경
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• 제26권6호
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• pp.95-105
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• 2021

Extensive groundwater abstraction has been recognized as one of the major challenges in management of coastal groundwater. The purpose of this study was to assess potential changes of groundwater distribution of northeastern Jeju Island over 10-year duration, where brackish water have been actively developed. To quantitatively estimate the coastal groundwater resources, numerical simulations using three-dimensional finite-difference density-dependent flow models were performed to describe spatial distribution of the groundwater in the aquifer under various pumping and recharge scenarios. The simulation results showed different spatial distribution of freshwater, brackish, and saline groundwater at varying seawater concentration from 10 to 90%. Volumetric analysis was also performed using three-dimensional concentration distribution of groundwater to calculate the volume of fresh, brackish, and saline groundwater below sea level. Based on the volumetric analysis, a quantitative analysis of future seawater intrusion vulnerability was performed using the volume-based vulnerability index adopted from the existing analytical approaches. The result showed that decrease in recharge can exacerbate vulnerability of coastal groundwater resources by inducing broader saline area as well as increasing brackish water volume of unconfined aquifers.

• Journal of the korean society of oceanography
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• 제32권1호
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• pp.28-37
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• 1997

Two marine bivalve shells were collected from the eastern and western coastal regions of Korea, respectively. Stable oxygen and carbon isotope profiles are constructed using the incremental sampling along the axis of maximum growth to provide the continuous ${\delta}^{18}$O and ${\delta}^{13}$C records, which register the physical, biological and chemical properties of seawater where the organisms live. Cycles in the ${\delta}^{18}$O profiles are interpreted as annual along with the identification of annual growth bands; the maximum ${\delta}^{18}$O values correspond with the coldest temperature of seawater whereas the minimum ${\delta}^{18}$O values with the warmest temperature. The primary control on the amplitude of the ${\delta}^{18}$O profiles is seasonal variation of seawater temperature. The offset of the baseline between ${\delta}^{18}$O values of the two specimens is attributed to differences in both temperature and seawater ${\delta}^{18}$O values between two localities. The ${\delta}^{13}$C profiles show the similar seasonality of carbon cycling associated with phytoplankton productivity. The offset in the ${\delta}^{13}$C profiles between two specimens may be, as in the case of oxygen isotope profile, attributed to the different ${\delta}^{13}$C value of the seawater DIC (dissolved inorganic carbon) between the western coast and the eastern coast. Relationships between the shell isotopic composition and the coastal water properties of shell growth are readily interpreted from the ${\delta}^{18}$O-${\delta}^{13}$C pair diagram of the shell isotope data, similar to the use of salinity-${\delta}^{18}$O diagram for identifying water masses. The preliminary stable isotope results of this study suggest that mollusk shell isotope geochemistry may be useful to monitor the properties of water masses in the coastal and inner shelf setting around Korea and improve the interpretation of paleoceanography, provided the fossil mollusks are well preserved.

• 대한지하수환경학회지
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• 제4권2호
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• pp.61-72
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• 1997

임해지역에서의 지하수 이용 및 지하공동 건설시 육지부 대수층으로의 해수침투가 문제될 수 있으며, 지하수질의 저하 또는 지하공동내의 시설부식을 초래할 수 있다. 본 연구는 임해지역의 지하공동시설 주변 지표수와 지하공동내 유입수에 대한 수질 분석과 환경동위원소 분석, 그리고 지하공동과 해안사이에 위치하는 수직수벽공에서의 심도별 수리특성조사와 수리간섭시험 등을 통하여 해수침투 현상을 규명하고, 이를 수리지질학적 관점에서 해석하였다. 육지부가 자유면대수층 조건일 때 이론적인 담수-해수체 경계면과 연구지역에서 확인된 해수침투경로와는 상당한 차이가 있었다. 지하공동으로 침투하는 해수의 주 경로는 해수체와 연결되는 sub-horizontal 단열대인 것으로 해석되었다. 임해지역에서 준평형 상태의 지하수체계에 변화를 초래하는 인위적 행위로 인하여 담수-해수체 경계면에 영향을 미치는 가장 큰 요인은 해수체와 연결되는 투수성 단열대의 분포특성이다.

• The Korean Journal of Ecology
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• 제19권3호
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• pp.261-270
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• 1996

To investigate the degree of contamination from Korean coastal region, the concentrations of Cu, Pb, Zn and Cd in sediments, seawater and oyster (Crassostrea gigas) at Masan Bay, Onsan Bay, Daesan industrial complex and their control areas were analysed. Values for sediments, seawater and oyster in the industrial complex coastal region were higher than those in the control area except for seawater in Daesan. The values for dissolved phasc of Cu, Pb, Zn and Cd in seawater showed 0.3~1.75 ${\mu}g/l$, 0.013~0.12 ${\mu}g/l$, 0.20~6.14 ${\mu}g/l$ and 0.007~0.021 ${\mu}g/l$, respectively. The concentrations of Cu, Pb, Zn and Cd in sediments werd 12.0~47.8 ${\mu}g/g$, 6.16~59.5 ${\mu}g/g$, 43.0~230 ${\mu}g/g$ and 0.52~11.2 ${\mu}g/g$, respectively. The concentrations of Cu, Pb, Zn and Cd in oyster showed 12.1~85.6 ${\mu}g/g$, 0.267~1.48 ${\mu}g/g$, 1, 070~3, 250 ${\mu}g/g$ and 3.23~7.71 ${\mu}g/g$, respectively. The contents of heavy metals in oysters at industrial complex coastal region showed that they were not seriously contaminated compared with those of Mussel Watch (1992).

• 지구물리와물리탐사
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• 제7권1호
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• pp.99-104
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• 2004

A combination of drilling, geophysical well logging, and electrical soundings was performed to evaluate seawater intrusion in Baeksu-eup, Youngkwang-gun, Korea. The survey area extends for over 24 $km^2$. To delineate the extent of seawater intrusion, 60 vertical electrical soundings (VES) have been carried out. Twelve wells were also drilled for the collection of hydrogeological, geochemical, and geophysical well logging data, to delineate the degree and vertical extent of seawater intrusion. To map the spatial distribution of seawater in this coastal aquifer, geophysical data and hydrogeochemical results were used, and the relation between the resistivity of groundwater and equivalent NaCl concentration was found. Layer parameters derived from VES data, various in-situ physical properties from geophysical well logging, and the estimated equivalent NaCl concentration were very useful for quantitative evaluation of seawater intrusion. Our approach for evaluating seawater intrusion can be considered a valuable attempt at enhancing the use of geophysical data.

• 대한토목학회논문집
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• 제35권3호
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• pp.557-565
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• 2015

기후온난화로 인해 해수면 상승은 연안지역의 해수침투 피해를 야기했다. 해수침투에 대한 취약성 지수를 PSR 모형과 계층화 분석 방법(AHP)을 이용하여 개발하였다. 우리나라 삼면의 연안지역 중 강원도 속초시, 인천시 강화군, 충청남도 태안군, 전라남도 여수시, 진도군을 선정하여 인문, 경제, 사회, 환경 등의 자료를 바탕으로 14개 지표를 선정하였다. 스케일 재조정방법을 통해 지표의 표준화를 실시하고, 전문가들의 의견을 반영한 설문으로 얻어진 가중치를 부여하여 해수침투 취약성 지수를 산정하였다. 그 결과 전라남도 여수시가 해수침투에 가장 취약한 지역으로 선정되었다. 개발된 해수침투 취약성 지수는 해수침투 피해를 최소화 할 수 있는 향후 정책을 결정하는 중요한 도구 및 기초자료로 활용될 수 있을 것으로 기대된다.

• 한국환경과학회지
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• 제23권12호
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• pp.1977-1985
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• 2014

Many countries around the world are amplifying interest and studies on irrigation, flood control and environment with concern on serious water problems. Especially for irrigation in water supply vulnerable areas such as coastal areas - islands, business on underwater resource security facilities are promoted to secure stable water resources due to development of society and increase of life quality. Also, various policies such as reuse of leaking underwater, utilization of underwater at waterfront, and artificial recharge, etc are planned and designed. In order to develop small sized underwater resource secure technology, verification of seawater-freshwater interface is executed and how the balance between these will develop is a great interest of coastal areas - islands. In this study, seawater-freshwater interface behavior analysis experiment was conducted while reflecting properties of coastal areas - islands and executed hydraulic similitude of saltwater intrusion form control technology on abstraction.