Calibration and Reliability in Groundwater Modelling: From Uncertainty to Decision Making
(Proceedings of ModelCARE’2005, The Hague, The Netherlands, June 2005). IAHS Publ. 304, 2006. pp.268–274.Diffuse loading of surface water from groundwater in areas with shallow groundwater tables:
quasi-2-D vs 2-D simulation
ElisabeTh PeTERS & Jasper griffioen
Netherlands Institute of Applied Geoscience TNO - National Geological Survey (TNO-NITG), PO Box 80015, NL-3508 TA Utrecht, The Netherlands
lies.peters@tno.nl
Abstract The discharge of water and solutes from groundwater to surface water can be simulated using a quasi two-dimensional (2-D) approach. In this approach, variably saturated flow is simulated in a vertical 1-D column and the discharge to the surface water system is simulated using conceptual relations. To test the quasi-2-D approach of SWAP/ANIMO, the results are compared to the results from a 2-D, variably-saturated flow and transport model: Hydrus-2D. The results show that in the case of stationary flow and/or conservative transport the results of the quasi-2-D approach are comparable to those of Hydrus-2D. For variable flow conditions and reactive transport, the results of the two models differ considerably.
Keywords
diffuse pollution; non-point source pollution; quasi-2-D; simulation; vadose zone; water table