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2020 Vol.25, Issue 4 Preview Page
Comparisons of Different Step-drawdown Test Analysis Methods; Implication for Improrvced Analysis for Step-drawdown Test Data

단계양수시험 해석 방법에 따른 우물 및 수리 상수 변동 분석

Hyowon An12
,
Kyoochul Ha12
,
Eunhee Lee1*
,
Byung Hee Do3
안 효원12
,
하 규철12
,
이 은희1*
,
도 병희3
1Korea Institute of Geoscience and Mineral Resources
2Dept. of Mineral & Groundwater Resources, University of Science and Technology
3Hanseo Engineering Inc.
1한국지질자원연구원 지구환경연구본부 지하수연구센터
2과학기술연합대학원대학교 광물·지하수자원학
3(주)한서엔지니어링
*Corresponding Author
31 December 2020. pp. 35-47
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Abstract

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
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Information
  • Publisher :The Korean Society of Soil and Groundwater Environment
  • Publisher(Ko) :한국지하수토양환경학회
  • Journal Title :Journal of Soil and Groundwater Environment
  • Journal Title(Ko) :지하수토양환경
  • Volume : 25
  • No :4
  • Pages :35-47
  • Received Date : 2020-11-02
  • Revised Date : 2020-11-05
  • Accepted Date : 2020-11-19
  • DOI :https://doi.org/10.7857/JSGE.2020.25.4.035
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