FREEWAT

The FREEWAT platform (v.1.0) is a large plugin integrated into the QGIS GIS desktop (http://qgis.org). At present, the FREEWAT plugin can be installed on Windows and Linux OS. Mac Users need a Windows/Linux virtual machine to run it on their own laptop. FREEWAT includes several modules for dealing with water management issues, with particular attention to groundwater. Simulation codes (mainly from the MODFLOW USGS family) for dealing with groundwater-related processes (e.g., groundwater flow, solute transport in aquifers, etc.) constitute the basis of the plugin. The complete list of modules so far integrated is provided below: Observations Analysis Tools (OAT) for time series analysis; Tools for the analysis, interpretation and visualization of hydrogeological data (akvaGIS); Tools for the analysis of groundwater quality datasets (akvaGIS); Groundwater flow modelling (based on MODFLOW-2005); Solute transport in the unsaturated zone (based on MT3D-USGS and the USB module); Solute transport in the saturated zone (based on MT3DMS); Density-dependent groundwater flow (based on SEAWAT); Management of water in agriculture (based on the FARM Process); Water management and planning (based on MODFLOW-OWHM); Crop yield at harvest (based on the Crop Growth Module, belonging to the EPIC family); Sensitivity analysis and calibration (based on UCODE_2014).