Abstract
The model described generates orthogonal fracture networks in tabular stratified aquifers, using a pseudo-random process which is controlled by mechanical rules of fracturing; it allows simulations of flow induced by single point pumping. Intersections between discontinuities, fractures, or joints of stratification are modelled as tubes with various dimensions. The hydrodynamic response is then compared with type-curves. In many cases, the simulations are explained by fractal hydraulic behaviour, although no fractal hypothesis has been assumed; the simulations emphasize the major role of the network connectivity, particularly around the well.