{"accessLevel": "public", "bureauCode": ["010:12"], "contactPoint": {"@type": "vcard:Contact", "fn": "Allen M Shapiro", "hasEmail": "mailto:ashapiro@usgs.gov"}, "description": "Simulations of one-dimensional (1-D) diffusion and adsorption of trichloroethene (TCE) in a \nrock matrix are conducted using rock properties identified from a mudstone aquifer in the \nNewark Basin, near West Trenton, New Jersey. The simulations are conducted using a \nfinite-difference algorithm that was prepared for this investigation to solve the equation \nfor 1-D diffusion and linear equilibrium adsorption. The simulations are conducted for a \nhypothesized 1-D section of a rock matrix and the georeferencing is based on the locations \nof the rock core samples that were collected and analyzed as part of this investigation. \nThe rock matrix is assumed to be adjacent to a fracture, where the TCE concentration \nin the fracture is responsible for diffusion into and out of the rock matrix. The fraction of \norganic carbon (foc) in the rock matrix can either be spatially uniform or spatially variable. \nSpatial variability in foc is defined from the mean and standard deviation of a log-normally \ndistributed parameter. Other rock properties controlling the diffusion and adsorption of TCE \nin the rock matrix are assumed to be spatially uniform. Simulations of diffusion and adsorption \ninto the rock matrix are conducted for four cases. These cases are: \n(1) spatially uniform foc equal to the average of foc from all rock samples; \n(2) spatially uniform foc equal to the maximum foc from all rock samples; \n(3) spatially uniform foc equal to the average foc from the Black Fissile (BLK-FIS) mudstone samples; \n(4) spatially variable foc defined from the statistics of the BLK-FIS mudstone samples. This USGS \ndata release contains all of the input and output files for the simulations described in the associated \njournal article (https://doi.org/10.1016/j.jconhyd.2018.09.001).", "distribution": [{"@type": "dcat:Distribution", "description": "The metadata original format", "downloadURL": "https://data.usgs.gov/datacatalog/metadata/USGS.9da6cb09-c60a-4ea9-a7ee-2fbbab3e258c.xml", "format": "XML", "mediaType": "text/xml", "title": "Original Metadata"}, {"@type": "dcat:Distribution", "accessURL": "https://doi.org/10.5066/P963WPSO", "description": "Landing page for access to the data", "format": "XML", "mediaType": "application/http", "title": "Digital Data"}], "identifier": "http://datainventory.doi.gov/id/dataset/USGS_9da6cb09-c60a-4ea9-a7ee-2fbbab3e258c", "keyword": ["usgsgroundwatermodel", "Mudstone", "inlandWaters", "environment", "carbon", "Lockatong Formation", "West Trenton", "Mercer County", "contaminant transport", "geoscientificInformation", "sedimentary rocks", "mathematical simulation", "New Jersey", "USGS:9da6cb09-c60a-4ea9-a7ee-2fbbab3e258c", "Newark Basin", "adsorption"], "modified": "2020-11-17T00:00:00Z", "publisher": {"@type": "org:Organization", "name": "U.S. Geological Survey"}, "spatial": "-74.81228649616243, 40.268720575626574, -74.8119217157364, 40.2690930526443", "theme": ["geospatial"], "title": "A finite-difference algorithm used to simulate one-dimensional diffusion and adsorption of trichloroethene in a rock matrix"}