• Evaluation of Vulnerability to Groundwater Contamination using Groundwater Quality Characteristics and DRASTIC Index in Miryang City
  • SeongYeon Jung1·Sieun Kim1·Sul-Min Yun2·Jeheon Oh3·Chung-Mo Lee1*

  • 1Department of Geological Science, Pusan National University, Busan 46241, Korea
    2Korea Institute of Civil Engineering and Building Technology, Gyeonggi-Do 10223, Korea
    3Korea Rural Community Corporation, Daegu 41463, Korea

  • 밀양시 지하수 수질 특성과 DRASTIC 지수를 이용한 지하수 오염취약성 평가
  • 정성연1·김시은1·윤설민2·오제헌3·이충모1*

  • 1부산대학교 지질환경과학과

  • This article is an open access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/4.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.


Miryang City, the study area, has a water supply rate of 87.4%, which is 12% lower than the national water supply rate of 99.4%, but has a high dependence on groundwater due to the high ratio of farms. In agricultural areas, contamination becomes relatively more critical, requiring significant attention to the management and conservation of groundwater resources. This study aims at estimate groundwater vulnerability of Miryang City using the DRASTIC index map, Piper diagram, and water quality data to correlated with the DRASTIC index. The results from DRASTIC map were divided into five classes: very high, high, moderate, low, and very low. The areas in central and southern part of study area, which are characterize by a very high index with [Ca-Cl] and [Na-Cl] water types, covering a large alluvium with the Miryang River and Nakdonggang River. In addition, a correlation analysis between groundwater quality parameters and the DRASTIC index was carried out. Chloride, sodium, and sulfate ions showed a weak relationship with DRASTIC index, with correlation coefficient was 0.507, 0.487 and 0.344, respectively. These results suggest that aquifer media, soil media, hydraulic conductivity, and chloride ion are important factors for groundwater vulnerability.

Keywords: Miryang, Groundwater quality, Water type, DRASTIC, Vulnerability

This Article

  • 2024; 29(3): 23-36

    Published on Jun 30, 2024

  • 10.7857/JSGE.2024.29.3.023
  • Received on May 23, 2024
  • Revised on Jun 14, 2024
  • Accepted on Jun 25, 2024

Correspondence to

  • Chung-Mo Lee
  • Department of Geological Science, Pusan National University, Busan 46241, Korea

  • E-mail: chungmo@pusan.ac.kr