{"accessLevel": "public", "bureauCode": ["010:12"], "contactPoint": {"@type": "vcard:Contact", "fn": "Donald A. Walter", "hasEmail": "mailto:dawalter@usgs.gov"}, "description": "The U.S. Geological Survey, in cooperation with the Air Force Civil Engineer Center, \ndeveloped a numerical, steady-state regional model, using MODFLOW-2005, to \nevaluate current (2010) conditions and the potential effects of future (2030) \ngroundwater withdrawals on water levels, streamflows, hydraulic gradients, and \nadvective transport near the Joint Base Cape Cod (JBCC).  Two numerical models \nwere used in this analysis.  An existing two-dimensional (one layer) model (termed\n the \u201ccoast model\u201d), developed as part of a previous investigation of the potential \neffects of sea-level rise on the Cape Cod aquifer system (https://doi.org/10.3133/sir20165058), \nsimulates the position of the freshwater/saltwater interface by using MODFLOW-2005 with \nthe SWI2 module.  The regional model is a steady-state, three-dimensional (32 layers) \nmodel, which incorporates that interface position, and is capable of representing \nhydrologic conditions on the Sagamore flow lens and advective transport in and near \nthe JBCC.  Particle-tracking analysis using the MODPATH program \n(https://pubs.er.usgs.gov/publication/ofr94464), was done to represent the \nadvective transport of conservative solutes in the aquifer.  A number of underlying \nassumptions inherent in the model, including observations and weights used in the \ncalibration, representation of local-scale heterogeneity, and simulation of the \nfreshwater/saltwater interface, could affect model calibration and predictions; these \nassumptions were evaluated with alternate models and alternate inverse calibrations. \nAlternate calibrations were performed in which different, but reasonable, observations \nand weights were used. In addition, a set of alternate models, in which silts were \nrepresented with different correlation distances and hydraulic conductivities, were \ndone to evaluate if explicitly representing silt lenses could affect model calibration. \nFinally, two alternate models representing silty and sandy sea bottoms and their \nassociated interface positions were developed to test the importance of the \nassumed coastal-boundary condition. This USGS data release contains all of the \ninput and output files for the simulations described in the associated model \ndocumentation report (https://doi.org/10.3133/sir20185139).", "distribution": [{"@type": "dcat:Distribution", "accessURL": "https://doi.org/10.5066/F77P8XCT", "description": "Landing page for access to the data", "format": "XML", "mediaType": "application/http", "title": "Digital Data"}, {"@type": "dcat:Distribution", "description": "The metadata original format", "downloadURL": "https://data.usgs.gov/datacatalog/metadata/USGS.65c23b3c-a9a6-4dee-b009-2a3c3fd7c1e0.xml", "format": "XML", "mediaType": "text/xml", "title": "Original Metadata"}], "identifier": "http://datainventory.doi.gov/id/dataset/USGS_65c23b3c-a9a6-4dee-b009-2a3c3fd7c1e0", "keyword": ["Bourne", "Cape Cod", "Falmouth", "Groundwater", "Groundwater Model", "InlandWaters", "Joint Base Cape Cod", "MODFLOW2005", "MODPATH", "Mashpee", "Massachusetts", "Sagamore lens", "Saltwater Intrusion", "Sandwich", "USGS:65c23b3c-a9a6-4dee-b009-2a3c3fd7c1e0", "environment", "geoscientificInformation", "inlandWaters", "usgsgroundwatermodel"], "modified": "2020-11-17T00:00:00Z", "publisher": {"@type": "org:Organization", "name": "U.S. Geological Survey"}, "spatial": "-70.7254, 41.481709, -70.134774, 41.805526", "theme": ["geospatial"], "title": "MODFLOW-2005 and MODPATH used to simulate the hydrologic system and transport of contaminants near Joint Base Cape Cod, Western Cape Cod, Massachusetts"}