Vrije Universiteit Brussel


WetSpass is a steady state spatially distributed water balance model for simulating yearly or seasonal averages of groundwater recharge, evapotranspiration (soil evaporation and transpiration also as separate outputs), runoff, and interception. The groundwater recharge output from WetSpass is used as input for MODFLOW in a steady state or seasonal varying groundwater model. The resulting groundwater depth of the MODFLOW head output is then used as input to WetSpass for refining the estimation of recharge. This process continues until a desirable groundwater head is achieved. The manual describes, the ArcView interface that links WetSpass with MODFLOW. The user is assumed to be familiar with MODFLOW (more specifically MODFLOW-2000 of the USGS). Currently, only head outputs of one layered groundwater models, with one or two stress periods, may be used in conjunction with WetSpass. In addition to coupling the two models, the interface has a provision for producing some of the MODFLOW input files such as drainage files, boundary (mask), and all array files from given ArcView Grid files. Although the two models can be run from the developed interface, the MODFLOW model has to be set up outside of the interface. To demonstrate how WetSpass works in conjunction with MODFLOW a tutorial is added in the final chapter of the manual. All the data needed for the tutorial together with the extension files is also included with the manual. It is also to be noted that, WetSpass can be run without running MODFLOW, thus it is not a must that it should be run in conjunction with MODFLOW as long as one has a good estimate of the groundwater depth input for WetSpass modeling. The model has been applied satisfactorily in different areas in Belgium and several other locations. Users are stimulated to discuss their research and results, experiences, problems with Okke Batelaan, batelaan@vub.ac.be.

For downloads of WetSpass follow this link.
For publications of WetSpass follow this link.

©2009 • Dpt of Hydrology and Hydraulic Engineering • Vrije Universiteit Brussel