Discharge tests are conducted in order to determine aquifers transmissivity (T) and storage coefficient (S). However the interpretation of test data is not unique and the results may vary depending on adopted hypothesis. In this work, the convolution technique is applied for the reconstruction of observed drawdown curves aiming for the reduction of uncertainty. The interference between a flowing well and an observation well is evaluated in order to determine the hydrogeological parameters of the confined Guarani Aquifer System (Araujo et al. 1999). Discharge test data are analyzed according to the Jacob and Lohman (1952)Jacob CE and Lohman SW. 1952. Nonsteady flow to a well of constant drawdown in an extensive aquifer. Trans Am Geophys Union 33(4): 559-569.method. The application of convolution enabled the determination of the most reliable solution. Obtained transmissivity (T = 411.0 m2/d) and storage coefficient (S = 2.75x10–4) are close to values estimated by direct evaluation of the geotechnical sandstone properties.
hydrogeology; groundwater; transmissivity; storage coefficient; pumping test
. The system responses(t*) (continuous line) is the result of a real impulse. This response is obtained by multiplying the unit response (RI
) by the strength of a real impulse (FΔτ). (Source: 
