Software Release: MT3D-USGS
MT3D-USGS, an updated release of MT3DMS and product of collaboration between the US Geological Survey (USGS) and S.S. Papadopulos and Associates, Inc. (SSP&A) is now available for download at http://water.usgs.gov/ogw/mt3d-usgs/. MT3D-USGS includes new transport modeling capabilities that accommodate previously unsupported flow terms calculated by the SFR, LAK, and UZF packages available within MODFLOW-NWT. MT3D-USGS is backward-compatible with MT3DMS, yet provides greater flexibility in the simulation of solute transport in both ground and surface water and reactive transport.
Further details about the new release can be found here: http://water.usgs.gov/ogw/mt3d-usgs/