Puget Sound Naval Shipyard Groundwater Model

In July 2012, the U.S. Geological Survey (USGS), in cooperation with Naval Facilities Engineering Command-Northwest, began a project to construct and apply a groundwater flow model for the area of Puget Sound Naval Shipyard to better understand the historical and potential future migration of volatile organic compounds (VOCs) in the groundwater. An existing steady-state USGS MODFLOW groundwater-flow model was (1) re-discretized to enhance the spatial resolution by approximately a factor of two; (2) updated with land-use information and recharge boundary conditions that reflect changes to the extent of industrial areas; (3) made consistent with the newly interpreted hydrogeologic framework for a regional groundwater-flow model constructed for the greater Kitsap Peninsula in 2016, and (4) calibrated using new groundwater-level data with the benefit of the parameter estimation program (PEST). The data in this resource constitutes the MODFLOW-NWT model.