Further developments of pumping test model

With the numerical model the evolution of the drawdown can be calculated in a layered groundwater reservoir for a constant discharge rate. The layers of the groundwater reservoir are supposed to be laterally homogeneous, isotropic and of an infinite lateral extension. When pumping tests are performed in practice, the above mentioned constraints of the numerical axi-symmetric model often limit the possibility to compare the observed and the calculated drawdown. These constrains limit the use of the numerical model as a base for an inverse model which allows the interpretation of a wide range of pumping tests.