ASM - Aquifer-Simulations-Model

ASM (Aquifer Simulation Model) is a horizontally or vertically, two-dimensional groundwater flow and transport model. The program offers the following options:

• steady state/time varying flow modelling
• homogeneous/heterogeneous aquifers
• confined/unconfined (leaky) aquifers
• isotropic/anisotropic aquifers with the restriction that the principal axes of the hydraulic conductivity/transmissivity tensor are parallel to the coordinate axes of the grid
• pumping/infiltration wells with constant or time-varying rates
• temporally and spatially variable groundwater recharge from precipitation
• water balances for the total model area and user specified subareas
• comparison of measured and computed piezometer heads
• automatic calibration for steady-state flow fields using Marquardt&Levenberg method
• generation of stochastic hydraulic conductivity/transmissivity distributions
• Pathline computation
• computation of isochrones around wells
• pollutant distributions developing after permanent or instantaneous pollutant injection
• pollutant breakthrough curves at selected observation or pumping wells.