Browse > Article
http://dx.doi.org/10.7857/JSGE.2021.26.3.001

Saltwater Intrusion Monitoring Evaluation through Automatic Vertical Line Method in a Costal Aquifer of the Eastern Part of Jeju Island  

Jang, Hojune (C&H Inc.)
Ha, Kyoochul (Korea Institute of Geoscience and Mineral Resources, Geologic Environment Division)
Hwang, Inuk (C&H Inc.)
Kim, Gee-Pyo (Jeju Special-Governing Province)
Park, Won-Bae (Jeju Research Institute Groundwater Research Center)
Publication Information
Journal of Soil and Groundwater Environment / v.26, no.3, 2021 , pp. 1-13 More about this Journal
Abstract
Groundwater monitoring is commonly practiced with real-time sensors placed in several depth spots in aquifer. However, this method only provides monitoring data at the point where the sensors are installed. In this study, we developed a vertical line monitoring system (VLMS) that can provide continuous data of groundwater parameters along the vertical depth. The device was installed in a well located on the coast of the eastern part of Jeju island to monitor electrical conductivity, temperature, salinity, pH, dissolved oxygen, and oxidation-reduction potential over approximately 3 months from September 11 to December 3, 2020. The results indicated that the groundwater levels fluctuated with the tidal change of seawater level, and the upper and lower boundaries of the freshwater and saltwater zone in the groundwater were located at below 16 m and 36 m of mean sea level, respectively. There was a large variation in EC values during the high tide and temperature change was the greatest during flow tide. Although further investigation is needed for improvement of the device to obtain more accurate and reliable data, the device has a potential utility to provide fundamental data to understand the seawater intrusion and transport mechanisms in coastal aquifers.
Keywords
Saltwater intrusion; Monitoring; Vertical line method; Jeju island; Coastal aquifer;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
연도 인용수 순위
1 Lee, B.J., Park, K., Koo, M.-H., Koh, G.W., and Park, Y.S., 2006, Hydraulic diffusivity and possibility of conduit-flow of groundwater in eastern part of Jeju island, J. Geol. Soc. Korea, 42(3), 439-454.
2 Koh, C.-S., Yoon, S.-H., Hwang, S., and Shin, J., 2020, Origin and characteristics of glassy breccias from the boreholes in the Woljeong-Haengwon area of northeastern Jeju Island, Korea, J. Geol. Soc. Korea, 56(1), 17-29.   DOI
3 ME (Ministry of Environment), K-water, 2018, Complementary Basic Groundwater Survey of Jeju Island, 220p.
4 Park, Y.S., Koh, G.W., Kang, B.-R., and Park, W.B., 2002, Jeju saltwater intrusion monitoring network establishment in 2001 - Songdang-ri, Gujwa-eup, Northern Jeju County, Proceedings of the Academic Seminar on the 10th Jeju World Water Forum, "Jeju Water, the property of the people of the Province", Jeju Special Self-Governing Province-Korea Institute of Geoscience and Mineral Resources, Jeju City, 73-113.
5 Kim, K.-H., Shin, J.-Y, Koh, E.-H., Koh, G.-W., and Lee, K.-K. 2009, Sea level rise around Jeju island due to global warming and movement of groundwater/seawater interface in the eastern part of Jeju island, J. Soil Groundw. Environ., 14(3), 68-79.
6 Chang, S.W., 2014, A review of recent research into coastal groundwater problems and associated case studies, J. Eng. Geol., 24(4), 597-608.   DOI
7 Freeze, R.A. and Cherry, J.A., 1979, Groundwater, Prentice-Hall, Inc., Englewood Cliffs, NJ, 604p.
8 Hwang, S., Shin, J., Park, I.H., and Park, G.-H., 2007, Assessment of seawater intrusion using geophysical well logging in eastern coasts, Jeju, Proceedings of the 6th Jeju-KIGAM Joint Workshop, Jeju Special Self-Governing Province-Korea Institute of Geoscience and Mineral Resources, Jeju City, 3-33.
9 Kim, K.-Y., Shim, B.-O., Park, K.-H., Kim, T.-H, Seong, H.-J, Park, Y.-S., Koh, G.-W., and Woo, N.-C., 2005, Analysis of hydraulic gradient at coastal aquifers in eastern part of Jeju island, Econ. Environ. Geol., 38(1), p.79-89.
10 MAFRA (Ministry of Agriculture, Food and Rural Affairs), KRC (Korea Rural Community Corporation), 2019, Annual report on the Seawater Intrusion Monitoring Network in Korea (2019), 724p.
11 MCT (Ministry of Construction and Transportation), KAIA (Korea Agency for Infrastructure Technology Advancement), 2020, Prediction technique development of fresh/salt water interface of Eastern Jeju Island, Korea, Final Report of Land, Transport, and Infrastructure Technology for Regional Specialization, 201p.
12 NIMS (National Institute of Meteorological Sciences), 2018, Climate change of 100 years in Korean Peninsula, 31p.
13 Park, N., Koh, B.-R., and Lim, Y., 2013, Impacts of fresh and saline groundwater development in Sungsan watershed, Jeju Island, J. Korea Water Resour. Assoc., 46(7), 783-794.   DOI