{"accessLevel": "public", "bureauCode": ["010:12"], "contactPoint": {"@type": "vcard:Contact", "fn": "John K Lovelace", "hasEmail": "mailto:jlovelac@usgs.gov"}, "description": "An updated three-dimensional, groundwater-flow and chloride-transport model (SEAWAT) \nof the Southern Hills regional aquifer system in southeastern Louisiana and southwestern \nMississippi was developed to examine the effects of groundwater withdrawals on the rate \nand pathways of saltwater migration in the \u201c1,500-foot\u201d sand, \u201c2,400-foot\u201d sand, and \n\u201c2,800-foot\u201d sand.  New interpretations of stratigraphic correlations amongst geophysical \nwell logs were utilized to revise a hydrogeologic-framework that delineates the depth and \nthickness variations of aquifers and confining units in the Southern Hills regional aquifer \nsystem. Regional groundwater flow throughout the Southern Hills regional aquifer system \nwas first simulated with MODFLOW, and flow-model parameters were calibrated to 8,810 \nwater levels observed through 2016 with the parameter-estimation code PEST++. Saltwater \ntransport was subsequently simulated for the \u201c1,500-foot\u201d sand, \u201c2,400-foot\u201d sand, and \n\u201c2,800-foot\u201d sand with the variable-density code, SEAWAT. Chloride-concentration \nmeasurements were used as a proxy for the saltwater to formulate the concentration \ninitial conditions and calibrate the transport-model parameters. Three hypothetical \ngroundwater management scenarios are included in the archive. These scenarios \nsimulate the future water levels and chloride concentrations within the \u201c1,500-foot\u201d \nsand, \u201c2,400-foot\u201d sand, and \u201c2,800-foot\u201d sand if groundwater withdrawals were to \ncontinue at 2016 rates or if one of two proposed modifications to the 2016 withdrawals \nfrom the \u201c1,500-foot\u201d sand or \u201c2,800-foot\u201d sand were to be enacted. The model was \ncalibrated to water levels measured in aquifers beneath the \u201c400-foot\u201d sand, and water \nlevels simulated in these aquifers could be used for various purposes, including predicting \nthe effects of changing pumping rates. Water planners and managers need additional \nknowledge about the effects of groundwater withdrawals on the rate and pathways of \nsaltwater migration and a tool to assess possible management strategies that could \ncontrol further saltwater encroachment in the Baton Rouge area. This USGS data release \ncontains all of the input and output files for the simulations described in the associated \nmodel documentation report (https://doi.org/10.3133/sir20195102).", "distribution": [{"@type": "dcat:Distribution", "accessURL": "https://doi.org/10.5066/P9URJ38Q", "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.047b61a0-31c1-486b-b92c-620fb841723e.xml", "format": "XML", "mediaType": "text/xml", "title": "Original Metadata"}], "identifier": "http://datainventory.doi.gov/id/dataset/USGS_047b61a0-31c1-486b-b92c-620fb841723e", "keyword": ["Ascension Parish", "Avoyelles Parish", "Baton Rouge", "Concordia Parish", "East Baton Rouge Parish", "East Feliciana Parish", "Groundwater", "Groundwater Model", "Iberville Parish", "InlandWaters", "Livingston Parish", "Louisiana", "MODFLOW-2005", "Pointe Coupee Parish", "SEAWAT", "St. Helena Parish", "St. Landry Parish", "St. Martin Parish", "Tangipahoa Parish", "Transport Model", "USGS:047b61a0-31c1-486b-b92c-620fb841723e", "West Baton Rouge Parish", "West Feliciana Parish", "environment", "geoscientificInformation", "hydrogeology", "inlandWaters", "salinity", "usgsgroundwatermodel", "water budget", "water use"], "modified": "2020-11-17T00:00:00Z", "publisher": {"@type": "org:Organization", "name": "U.S. Geological Survey"}, "spatial": "-91.915925, 30.242934, -90.447555, 31.337561", "theme": ["geospatial"], "title": "SEAWAT Model of Flow and Chloride Transport in the 1,500-Foot, 2,400-Foot, and 2,800-Foot Sands of the Baton Rouge Area, Louisiana"}