Hydrogeochemical interpretation of South Korean groundwater monitoring data using Self-Organizing Maps
DC Field | Value | Language |
---|---|---|
dc.contributor.author | Choi, Byoung-Young | - |
dc.contributor.author | Yun, Seong-Taek | - |
dc.contributor.author | Kim, Kyoung-Ho | - |
dc.contributor.author | Kim, Ji-Wook | - |
dc.contributor.author | Kim, Hyang Mi | - |
dc.contributor.author | Koh, Yong-Kwon | - |
dc.date.accessioned | 2021-09-05T11:39:31Z | - |
dc.date.available | 2021-09-05T11:39:31Z | - |
dc.date.created | 2021-06-15 | - |
dc.date.issued | 2014-02 | - |
dc.identifier.issn | 0375-6742 | - |
dc.identifier.uri | https://scholar.korea.ac.kr/handle/2021.sw.korea/99382 | - |
dc.description.abstract | The National Groundwater Monitoring Network (NGMN) of South Korea provides data since 1995 to monitor the water level and quality of groundwater on a national scale. Major ions such as Ca, Mg, Na, K, HCO3, Cl, SO4 and NO3 have been monitored since 2008 to assess groundwater quality. Hydrochemical data of bedrock groundwater samples collected from 299 monitoring stations in 2009 were examined using the Self-Organizing Map (SOM) approach. Based on hydrochemical characteristics, bedrock groundwater is clustered into two groups and six subgroups. Group I containing 70.2% of groundwater samples (and monitoring stations) is characterized by lower TDS values and NO3 concentrations than Group II, indicating that Group I waters are less affected by contamination. Subgroup I-1 (39.1%) represents Ca-HCO3-typergroundwater with relatively low pH, TDS and concentrations of most ions compared with groundwater of Subgroups 1-2-1 (26.1%) and 1-2-2 (5.0%). Subgroup 1-2-2 represents a moderately alkaline, F-rich, Na-HCO3-type groundwater. Group II records either anthropogenic or natural processes. Subgroup II-1 (16.1%) contains groundwater with low values of TDS, HCO3 and pH, and moderately high NO3 concentrations due to nitrification, while groundwater of Subgroups II-2-1 and II-2-2 is characteristically high in Ca and Mg. Subgroup II-2-1 is also very high in SO4 and HCO3 but very low in NO3, while Subgroup II-2-2 is substantially enriched in Cl and NO3. The hydrochemistry of groundwater of Subgroup II-2-1 likely results from dissolution of carbonates and gypsum in clastic sedimentary rocks and is affected by dissolution of pyrite and/or S-bearing fertilizers in crystalline rocks. The enrichment of NO3, Cl, Ca and Mg in groundwater of Subgroup II-2-2 is the result of substantial contamination from agrochemicals and manure. Thus, about 20.5 (Subgroups II-1 and II-2-2) of bedrock groundwater in South Korea records anthropogenic contamination. This study shows that the SOM approach can be successfully used to classify and characterize the groundwater in terms of hydrochemistry and quality on a regional scale. (C) 2013 Elsevier B.V. All rights reserved. | - |
dc.language | English | - |
dc.language.iso | en | - |
dc.publisher | ELSEVIER | - |
dc.subject | PRINCIPAL-COMPONENTS-ANALYSIS | - |
dc.subject | ALLUVIAL AQUIFER | - |
dc.subject | FLUORINE GEOCHEMISTRY | - |
dc.subject | HYDROCHEMICAL FACIES | - |
dc.subject | STATISTICAL-ANALYSIS | - |
dc.subject | WATER CHEMISTRY | - |
dc.subject | TRACE-ELEMENTS | - |
dc.subject | COASTAL AREA | - |
dc.subject | NITRATE | - |
dc.subject | CLASSIFICATION | - |
dc.title | Hydrogeochemical interpretation of South Korean groundwater monitoring data using Self-Organizing Maps | - |
dc.type | Article | - |
dc.contributor.affiliatedAuthor | Yun, Seong-Taek | - |
dc.identifier.doi | 10.1016/j.gexplo.2013.12.001 | - |
dc.identifier.scopusid | 2-s2.0-84891629835 | - |
dc.identifier.wosid | 000331415200008 | - |
dc.identifier.bibliographicCitation | JOURNAL OF GEOCHEMICAL EXPLORATION, v.137, pp.73 - 84 | - |
dc.relation.isPartOf | JOURNAL OF GEOCHEMICAL EXPLORATION | - |
dc.citation.title | JOURNAL OF GEOCHEMICAL EXPLORATION | - |
dc.citation.volume | 137 | - |
dc.citation.startPage | 73 | - |
dc.citation.endPage | 84 | - |
dc.type.rims | ART | - |
dc.type.docType | Article | - |
dc.description.journalClass | 1 | - |
dc.description.journalRegisteredClass | scie | - |
dc.description.journalRegisteredClass | scopus | - |
dc.relation.journalResearchArea | Geochemistry & Geophysics | - |
dc.relation.journalWebOfScienceCategory | Geochemistry & Geophysics | - |
dc.subject.keywordPlus | PRINCIPAL-COMPONENTS-ANALYSIS | - |
dc.subject.keywordPlus | ALLUVIAL AQUIFER | - |
dc.subject.keywordPlus | FLUORINE GEOCHEMISTRY | - |
dc.subject.keywordPlus | HYDROCHEMICAL FACIES | - |
dc.subject.keywordPlus | STATISTICAL-ANALYSIS | - |
dc.subject.keywordPlus | WATER CHEMISTRY | - |
dc.subject.keywordPlus | TRACE-ELEMENTS | - |
dc.subject.keywordPlus | COASTAL AREA | - |
dc.subject.keywordPlus | NITRATE | - |
dc.subject.keywordPlus | CLASSIFICATION | - |
dc.subject.keywordAuthor | Hydrochemistry | - |
dc.subject.keywordAuthor | Bedrock groundwater | - |
dc.subject.keywordAuthor | National Groundwater Monitoring Network | - |
dc.subject.keywordAuthor | Self-Organizing Map (SOM) approach | - |
dc.subject.keywordAuthor | Classification and characterization | - |
dc.subject.keywordAuthor | South Korea | - |
Items in ScholarWorks are protected by copyright, with all rights reserved, unless otherwise indicated.
(02841) 서울특별시 성북구 안암로 14502-3290-1114
COPYRIGHT © 2021 Korea University. All Rights Reserved.
Certain data included herein are derived from the © Web of Science of Clarivate Analytics. All rights reserved.
You may not copy or re-distribute this material in whole or in part without the prior written consent of Clarivate Analytics.