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http://dx.doi.org/10.7843/kgs.2007.23.11.99

Application of Linear Curve Fitting Methods for Slug Test Analysis in Compressible Aquifer  

Choi, Hang-Seok (Dept. of Civil, Environ, and Architectural Engrg., Korea University)
Lee, Chul-Ho (Dept. of Civil, Environ, and Architectural Engrg., Korea University)
Nguyen, The Bao (Dept. of Civil, Environ, and Architectural Engrg., Korea University)
Publication Information
Journal of the Korean Geotechnical Society / v.23, no.11, 2007 , pp. 99-107 More about this Journal
Abstract
The linear curve 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 material. However, when analyzing a slug test in a relatively compressible aquifer, these methods have difficulties in fitting a straight line to the semi-logarithmic plot of the test data that shows a concave-upward curvature because the linear curve fitting methods ignore the role of the compressibility or specific storage ($S_s$) of an aquifer. The comparison of the Hvorslev method and the Bouwer and Rice method is made far a partially-penetrating well geometry to show analytically that the Hvorslev method estimates higher hydraulic conductivity than the Bouwer and Rice method except that the well intake section locates very close to the bottom of the aquifer. The effect of fitting a straight line to the slug test data is evaluated along with the dimensionless compressibility parameter (${\alpha}$) ranging from 0.001 to 1. A modified linear curve fitting method that is expanded from Chirlin's approach to the case of a partially penetrating well with the basic-time-lag fitting method is introduced. A case study for a compressible glacial till is made to verify the proposed method by comparing with a type curve method (KGS method).
Keywords
Bouwer and Rice method; Compressible aquifer; Hvorsleve method; Linear curve fitting; Slug test;
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  • Reference
1 Dax, A. (1987), 'A Note on the Analysis of Slug Tests', Journal of Hydrology, Vo1.91, pp.153-177   DOI   ScienceOn
2 Hyder, Z., and Butler, J. J. (1995), 'Slug Tests in Unconfined Formations: An Assessment of the Bouwer and Rice Technique', Ground Water, Vol.33, No.1, pp.16-22   DOI   ScienceOn
3 Cooper, H. H., Bredehoeft, J. D., and Papadopulos, I. S. (1967), 'Response of a Finte-diameter Well to an Instantaneous Charge of Water', Water Resource Research, Vol.3, No.1, pp.263-269   DOI
4 Freeze, R. A., and Cherry, J. A. (1979), Groundwater, Prentice-Hall, Inc
5 Hvorslev, M. J. (1951), Time Lag and Soil Permeability in Groundwater Observation, Waterways Experiment Station, Bulletin No. 36, Corps of Engineering, U.S. Army, Vicksburg, Mississippi
6 Bouwer, H. (1989), 'The Bouwer and Rice Slug Test-An Update', Ground Water, Vo1.1.27, No.3, pp.304-309
7 Butler, J. J. (1998), The Design, Performance, and Analysis of Slug Tests, Lewis Publishers
8 Hyder, Z. (1994), Analysis of Slug Tests in Partially Penetrating Wells, Ph. D. Thesis, University of Kansas
9 Chirlin, G.R. (1989), 'A critique of the Hvorslev method for slug test analysis: The fully penetrating well', Ground Water Monitoring Review, Vo1.9, No.2, pp.130-138   DOI
10 Bouwer, H., and Rice, R. C. (1976), 'A Slug Test for Determining Hydraulic Conductivity of Unconfmed Aquifer with Completely or Partially Penetrating Wells', Water Resource Research, Vo1.12, No.3, pp.423-428   DOI
11 Papadopulos, S. S., Bredehoeft, J. D., and Cooper, H. H. (1973), 'On the Analysis of Slug Test Data', Water Resource Research, Vol.9, No.4, pp.1087-1089   DOI
12 Butler, J. J. (1996), 'Slug Tests In Situ Characterization: Some Practical Consideration', Environmental Geoscience, Vol.3, No.2, pp.154-163
13 Herzog, B.L., R.A. Griffin, C.J. Stohr, L.R. Follmer, W.J. Morse, and W.J. Suo (1989), Investigations of failure mechanisms and migration of organic chemicals at wilsonville, Illinois, Report in Illinois State Geological Survey
14 Ferris, J. G., and Knowles, D. B. (1963), 'The Slug-injection Test for Estimating the Coefficient of Transmissibility of an Aquifer', Methods of Determining Permeability, Transmissibility, and Drawdown, US Geological Survey Water Supply Paper, pp.229-304