Modelling of multiple aquifers
The integrated 2D grundwaterer model has follwing features:
- Finite Elemente Methode for iterative Solution of flow and transport equation
- Consideration of (theoretically) any number of confined and unconfined aquifers
- Coupling between aquifers is done using colmation grids
- Constant head boundary conditions
- Constant flux boundary conditions
- Fully integrated salt and tracer transport
- Interaction with surface water: consideration of groundwater exfiltration and re-infiltration, e.g. into and from river beds or lakes
Input grids for groundwater module:
- Hydraulic conductivities in x- and y-direction for each aquifer
- storage coefficients (important for confined aquifers)
- Porosities (for unconfined aquifers, will, however, be over overwritten internally with soil moisture specifc actual values)
- River widths and depths (for all celsl which should be handled as riuver cells)
- Colmation of the river beds
- Colmation between the aquifers (for leakage calculations)
- Boundary conditions of first and second order (constant head and constant flux)
- Aquifer thicknesses
A detailed documentation for modelling groundwater fluxes can be found in the documentation (2012).