Original Article

Econ. Environ. Geol. 2018; 51(1): 15-26

Published online February 28, 2018

https://doi.org/10.9719/EEG.2018.51.1.15

© THE KOREAN SOCIETY OF ECONOMIC AND ENVIRONMENTAL GEOLOGY

Spatial-temporal Variations of Nitrate Levels in Groundwater of Jeju Island, Korea: Evaluation of Long-term (1993-2015) Monitoring Data

Ho-Rim Kim1, Junseop Oh2, Hyun-Kwon Do2, Kyung-Jin Lee2, Ik-Hyun Hyun3, Sang-Sil Oh3, Sang-Kyu Kam4 and Seong-Taek Yun1,2*

1KU-KIST Green School, Korea University, Seoul, Korea
2Department of Earth and Environmental Sciences, Korea University, Seoul, Korea
3Research Institute of Health & Environment, Jeju Special-Governing Province, Jeju, Korea
4Department of Environmental Engineering, Jeju National University, Jeju, Korea

Correspondence to : styun@korea.ac.kr

Received: January 22, 2018; Revised: February 27, 2018; Accepted: February 27, 2018

This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided original work is properly cited.

Abstract

The spatio-temporal variations of nitrate concentrations in groundwater of Jeju Island were evaluated by an analysis of time series groundwater quality data (N = 21,568) that were collected from regional groundwater monitoring (number of wells = 4,835) for up to 20 years between 1993 and 2015. The median concentration of NO3-N is 2.5 mg/L, which is slightly higher than those reported from regional surveys in other countries. Nitrate concentrations of groundwater in wells tend to significantly vary according to different water usage (of the well), administrative districts, and topographic elevations: nitrate level is higher in low-lying agricultural and residential areas than those in high mountainous areas. The Mann-Kendall trend test and Sen’s slope analysis show that nitrate concentration in mid-mountainous areas tends to increase, possibly due to the expansion of agricultural areas toward highland. On the other hand, nitrate concentrations in the Specially Designated Groundwater Quality Protection Zones show the temporally decreasing trend, which implies the efficiency of groundwater management actions in Jeju. Proper measures for sustainable groundwater quality management are suggested in this study.

Keywords groundwater quality, Jeju, nitrate, monitoring, trend analysis

제주도 지하수 질산염 농도의 시·공간적 변화 특성: 장기(1993-2015) 모니터링 자료의 평가

김호림1 ·오준섭2 ·도현권2 ·이경진2 ·현익현3 ·오상실3 ·감상규4 ·윤성택1,2*

1고려대학교 KU-KIST 그린스쿨대학원, 2고려대학교 지구환경과학과, 3제주특별자치도 보건환경연구원, 4제주대학교 환경공학과

요 약

Article

Original Article

Econ. Environ. Geol. 2018; 51(1): 15-26

Published online February 28, 2018 https://doi.org/10.9719/EEG.2018.51.1.15

Copyright © THE KOREAN SOCIETY OF ECONOMIC AND ENVIRONMENTAL GEOLOGY.

Spatial-temporal Variations of Nitrate Levels in Groundwater of Jeju Island, Korea: Evaluation of Long-term (1993-2015) Monitoring Data

Ho-Rim Kim1, Junseop Oh2, Hyun-Kwon Do2, Kyung-Jin Lee2, Ik-Hyun Hyun3, Sang-Sil Oh3, Sang-Kyu Kam4 and Seong-Taek Yun1,2*

1KU-KIST Green School, Korea University, Seoul, Korea
2Department of Earth and Environmental Sciences, Korea University, Seoul, Korea
3Research Institute of Health & Environment, Jeju Special-Governing Province, Jeju, Korea
4Department of Environmental Engineering, Jeju National University, Jeju, Korea

Correspondence to:styun@korea.ac.kr

Received: January 22, 2018; Revised: February 27, 2018; Accepted: February 27, 2018

This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided original work is properly cited.

Abstract

The spatio-temporal variations of nitrate concentrations in groundwater of Jeju Island were evaluated by an analysis of time series groundwater quality data (N = 21,568) that were collected from regional groundwater monitoring (number of wells = 4,835) for up to 20 years between 1993 and 2015. The median concentration of NO3-N is 2.5 mg/L, which is slightly higher than those reported from regional surveys in other countries. Nitrate concentrations of groundwater in wells tend to significantly vary according to different water usage (of the well), administrative districts, and topographic elevations: nitrate level is higher in low-lying agricultural and residential areas than those in high mountainous areas. The Mann-Kendall trend test and Sen’s slope analysis show that nitrate concentration in mid-mountainous areas tends to increase, possibly due to the expansion of agricultural areas toward highland. On the other hand, nitrate concentrations in the Specially Designated Groundwater Quality Protection Zones show the temporally decreasing trend, which implies the efficiency of groundwater management actions in Jeju. Proper measures for sustainable groundwater quality management are suggested in this study.

Keywords groundwater quality, Jeju, nitrate, monitoring, trend analysis

제주도 지하수 질산염 농도의 시·공간적 변화 특성: 장기(1993-2015) 모니터링 자료의 평가

김호림1 ·오준섭2 ·도현권2 ·이경진2 ·현익현3 ·오상실3 ·감상규4 ·윤성택1,2*

1고려대학교 KU-KIST 그린스쿨대학원, 2고려대학교 지구환경과학과, 3제주특별자치도 보건환경연구원, 4제주대학교 환경공학과

Received: January 22, 2018; Revised: February 27, 2018; Accepted: February 27, 2018

요 약

    KSEEG
    Apr 30, 2024 Vol.57 No.2, pp. 107~280

    Stats or Metrics

    Share this article on

    • kakao talk
    • line

    Related articles in KSEEG

    Economic and Environmental Geology

    pISSN 1225-7281
    eISSN 2288-7962
    qr-code Download