Estimation of Hydrogeologic Parameters at the Cape Cod Hydrology Research Site

The article deals with computer analysis of flow to pumping well partially penetrating the high conductivity porous water table aquifer. Water level depletion in the pumping well, 3 partially penetrating observation wells, and 6 piezometers of short screen are evaluated in the analysis. The WT software considers the delayed gravity drainage caused by dewatering of the overlying unsaturated zone. This flow is emulated as diffusive crossflow or leakage from an aquitard with an impervious top. The analytical method by Hantush (1962) is applied to confirm the aquifer parameters using the late time drawdown data in all observation wells and piezometers. The software PEST is employed to optimize the aquifer properties and the presumably laminar specific radial loss parameter of the pumping well. The results are compared with two earlier analyses. The k_r and k_z parameters fit the relevant data by Moench et al. (2001), whereas the S_y parameter is close to the value by Tartakovsky and Neuman (2007). An intermediate value is found for the S_s parameter.