Amwells: alternative approach to well systems simulation
The problems of groundwater dynamics in terms of aquifer systems response to wellfield operation are commonly solved with the use of models based on numerical methods for solving differential equations.
If the obvious advantages of numerical models are well known, their disadvantages include, in particular: the dependence of the result on the model domain discretization, the effect of model domain boundaries on groundwater flow, the difficulties in the validation of the obtained result, and the problems with simulating pumping wells (especially, in regional-scale problems). Another disadvantage is the considerable time required to develop a numerical model and the necessary experience in dealing with simulation programs.
Module AmWells implements an alternative approach to well systems simulation. This approach is based on the development of simplified hydrodynamic models underlain by the solutions of well-known groundwater flow equations and the principle of superposition. Analytical model can be effectively used in the cases where the natural hydrogeological situation can be schematized to simple standard conditions.
The major advantage of analytical modeling is the absolute accuracy of the estimated level change in either pumping well or any point within the model domain. The analytical models do not require discretization in space or time, thus making the development and use of models much simpler.
Such approach to simulation provides the researcher with an instrument for prompt and descriptive choice of the optimal number and layout of wells, the evaluation of maximal drawdown at likely discharge rates of the pumping wells, and the assessment of the duration of pumping test and its range of influence.