Slug test analysis to evaluate permeability of compressible materials.
The line-fitting methods such as the Hvorslev method and the Bouwer and Rice method provide a rapid and simple means to analyze slug test data for estimating in situ hydraulic conductivity (k) of geologic materials. However, when analyzing a slug test in a relatively compressible geologic formation, these conventional methods may have difficulties fitting a straight line to the semilogarithmic plot of the test data. Data from relatively compressible geologic formations frequently show a concave-upward curvature because of the effect of the compressibility or specific storage (S(s)). To take into account the compressibility of geologic formations, a modified line-fitting method is introduced, which expands on Chirlin's (1989) approach to the case of a partially penetrating well with the basic-time-lag fitting method. A case study for a compressible till is made to verify the proposed method by comparing the results from the proposed methods with those obtained using a type-curve method (Kansas Geological Survey method [Hyder et al. 1994]).
Department of Civil, Environmental, and Architectural Engineering, Korea University, Anam-Dong, Seongbuk-Gu, Seoul, South Korea. hchoi2@korea.ac.kr
Hangseok
H
Choi
The-Bao
TB
Nguyen
Chulho
C
Lee
D055593:Geological Phenomena; D005844:Geology; D010539:Permeability; D014867:Water
D014867:Water