Visual MODFLOW Pro is trusted and used by more groundwater professionals than any other modeling software in the world thanks to several seamlessly integrated numeric engines with an easy-to-use graphical interface. Overview With the ability to simulate groundwater and surface water interactions, and the added capability of calculating changes to groundwater chemistry, groundwater professionals now have a complete set of tools necessary for addressing water quality, groundwater supply, and source water protection initiatives. SEAWAT v.4 - the latest USGS modeling code designed to address 3D variable-density groundwater flow coupled with multi-species solute and heat transport MODFLOW-2000 - World standard for groundwater flow simulations MODFLOW-2005 - three-dimensional finite-difference groundwater-model, 2005 version MODFLOW-NWT- a Newton Formulation for MODFLOW-2005 MODPATH - standard package for forward and reverse particle tracking Zone Budget - for sub-regional water budget calculations MT3DMS - for multi-species contaminant transport simulations MNW (Multi-Node Well) - designed to help simulate wells with well screens that span multiple layers. RT3D - for reactive transport simulations PHT3D – a multi-component transport model for three-dimensional reactive transport in saturated porous media. It couples the two existing and widely used computer programs, the solute transport model MT3DMS and the USGS geochemical code PHREEQC-2. MGO - for determining the optimal well pumping and/or injection rates at one or more wells, in order to achieve a specific objective while maintaining reasonable system responses. VMOD 3D-Explorer - 3D visualization and animation WinPEST - automated calibration and sensitivity analysis GMG (Geometric Multi-Grid) Solver Integration - latest USGS solver designed to optimize memory usage and reduce model run times Stream Routing Package - suited for simulating the effects of surface water/groundwater interactions Lake Package (LAK3) - simulate lakes and how they interact with the aquifer within your model Evapotranspiration Segments (ETS1) Package - simulate evapotranspiration using a user-defined relation between evapotranspiration rate and hydraulic head.