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i Appendix C ' Slug Test Procedures C•2 ANALYTICAL METHODS ' AQTESOL'v for Windows"m was utilized for the analysis of the slug test data The following is a discussion of the two analytical solutions used to evaluate the slua test data collected during ' field activities Results of the analysts are summanzed in Table ;-3, and the data plots are attached at the end of this appendix ' Souwer-Rice (1976) The Bouwer and Rice (1976) solution. based on Thiem's equation. incorporates an empirical , relationship describing the water-level response in an unconfined aquifer resulting from the instantaneous injection or withdrawal of water from a well The Bouwer-Rice (1976) solution recommends computing an equivalent casing radius (r,,) to ' correct for the porosity of the filter material when the change in water level occurs within the filter material In addition, Zlotnik (1994) advises the use of an equivalent well-bore radius if the aquifer is anisotropic: in the vertical plane ' Application of the Bouwer-Rice (1976) method to estimating the hydraulic conductivity of an unconfined aquifer assumes that within the area of the test the aquifer is infinite in areal extent. is homogeneous and isotropic and uniform in thickness Other assumptions and conditions include ' that the water table is (nearly) horizontal. the piezometnc head in the well is changed instantaneously, the drawdown around the well is negligible. there is no flow above the water table. the linear and non-linear well losses are negligible the well either partially or fully penetrates the saturated thickness of the aquifer. the well diameter is finite and the flow is steady state Details of this method are described on the follow-ing pages ' Cooper-Bredehoeft-Papadopulos (CBP) (1967) ' Cooper et al (196 7) derived an analytical solution describing the water-level response due to the instantaneous infection or withdra«al of,,%ares from a we11 in a confined aquifer ' B' matching n-pe curves of the Cooper-Bredehoeft-Papadopulos slug test solution to data plotted on semi-loJanthmic axes it is possible to estimate T and S for a confined aquifer ' -�nplication of the CBP method to estimating the transmn sn in and storatvv ir% of a confined a4u:ter assumes that "chin the area oC the test the molter is infirute in areal emert i�, lac m,_-,geneous anti isotropic ara uiIi=orrn in thic"ness Otlher assamcrions and conditions include i that the «ate; table is (nearl%) l,or zonal the r iezomztnc head in the «ell is cl1a1'Lned C-2 40V—SSaZ.� .eai$V.t