• Comparisons of Different Step-drawdown Test Analysis Methods; Implication for Improrvced Analysis for Step-drawdown Test Data
  • Hyowon An1,2·Kyoochul Ha1,2·Eunhee Lee1,*·Byung Hee Do3

  • 1Korea Institute of Geoscience and Mineral Resources
    2Dept. of Mineral & Groundwater Resources, University of Science and Technology
    3Hanseo Engineering Inc. 

  • 단계양수시험 해석 방법에 따른 우물 및 수리 상수 변동 분석
  • 안효원1,2·하규철1,2·이은희1,*·도병희3

  • 1한국지질자원연구원 지구환경연구본부 지하수연구센터
    2과학기술연합대학원대학교 광물·지하수자원학


Step-drawdown test is one of the widely-used aquifer test methods to evaluate aquifer and well losses. Various approaches have been suggested to estimate well losses using the step-drawdown test data but the uncertainties associated with data interpretation and analysis still exist. In this study, we applied three different step-drawdown test analysis methods -Jacob (1947), Labadie and Helweg (1975), Gupta (1989)- to the step-drawdown test data in Seobu-myeon, Hongseong-gun, South Korea and estimated aquifer and well losses. Comparisons of different step-drawdown test analysis methods revealed that the estimated well losses showed different values depending on the applied methods and these variations are likely to be related to the limitation of the assumptions for each analysis method. Based on the detailed analysis of time-drawdown data, we performed step-drawdown test analysis after removing outlier data during the initial stage of step drawdown test. The results showed that the application of the revised time-drawdown data could substantially decrease the error of the analysis as well as the variations in the estimated well losses from different analysis methods. 

Keywords: Step-drawdown test, well losses, Jacob, Labadie and Helweg, Gupta

This Article

  • 2020; 25(4): 35-47

    Published on Dec 31, 2020

  • 10.7857/JSGE.2020.25.4.035
  • Received on Nov 2, 2020
  • Revised on Nov 5, 2020
  • Accepted on Nov 19, 2020

Correspondence to

  • Eunhee Lee
  • Korea Institute of Geoscience and Mineral Resources

  • E-mail: eunheelee@kigam.re.kr