Development of Seawater Intrusion Vulnerability Assessment for Averaged Seasonality of Using Modified GALDIT Method
Department of Land, Water and Environmental Research, Korea Institute of Civil Engineering and Building Technology, Goyang 10223, Korea
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Academic Editors: Evangelos Tziritis and Andreas Panagopoulos
Water 2021, 13(13), 1820; https://doi.org/10.3390/w13131820
Received: 21 May 2021
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Revised: 15 June 2021
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Accepted: 24 June 2021
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Published: 30 June 2021
(This article belongs to the Special Issue Geo-Environmental Approaches for the Analysis and Assessment of Groundwater Resources at Catchment-Scale)
Climate change and anthropogenic activities are necessitating accurate diagnoses of seawater intrusion (SWI) to ensure the sustainable utilization of groundwater resources in coastal areas. Here, vulnerability to SWI was assessed by classifying the existing GALDIT into static parameters (groundwater occurrence (G), aquifer hydraulic conductivity (A), and distance from shore (D)) and dynamic parameters (height to groundwater-level above sea-level (L), impact of existing status of seawater intrusion (I), and aquifer thickness (T)). When assessing the vulnerability of SWI based on observational data (2010–2019), 10-year-averaged data of each month is used for GALDIT dynamic parameter for representing the seasonal characteristics of local water cycles. In addition, the parameter L is indicated by the data observed at the sea-level station adjacent to the groundwater level station. The existing GALDIT method has a range of scores that can be divided into quartiles to express the observed values. To sensitively reflect monthly changes in values, the range of scores is divided into deciles. The calculated GALDIT index showed that the most vulnerable month is September, due to relatively low groundwater level. The proposed method can be used to apply countermeasures to vulnerable coastal areas and build water resources management plan considering vulnerable seasons.
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Keywords:
GALDIT; monthly vulnerability; seawater intrusion (SWI); vulnerability assessment; effective weight; densely populated area
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MDPI and ACS Style
Kim, I.H.; Chung, I.-M.; Chang, S.W. Development of Seawater Intrusion Vulnerability Assessment for Averaged Seasonality of Using Modified GALDIT Method. Water 2021, 13, 1820. https://doi.org/10.3390/w13131820
AMA Style
Kim IH, Chung I-M, Chang SW. Development of Seawater Intrusion Vulnerability Assessment for Averaged Seasonality of Using Modified GALDIT Method. Water. 2021; 13(13):1820. https://doi.org/10.3390/w13131820
Chicago/Turabian StyleKim, Il Hwan, Il-Moon Chung, and Sun Woo Chang. 2021. "Development of Seawater Intrusion Vulnerability Assessment for Averaged Seasonality of Using Modified GALDIT Method" Water 13, no. 13: 1820. https://doi.org/10.3390/w13131820
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