Research Activities at U.S. Government Agencies in Subsurface Reactive Transport Modeling

The fate of contaminants in the environment is controlled by both chemical reactions and transport phenomena in the subsurface. Our ability to understand the significance of these processes over time requires an accurate conceptual model that incorporates the various mechanisms of coupled chemical and physical processes. Adsorption, desorption, ion exchange, precipitation, dissolution, growth, solid solution, redox, microbial activity, and other processes are often incorporated into reactive transport models for the prediction of contaminant fate and transport. U.S. federal agencies use such models to evaluate contaminant transport and provide guidance to decision makers and regulators for treatment issues. We provide...

Categories: Publication; Types: Citation; Tags: ARS, Agricultural Research Service, BTEX, CNWRA, Center for Nuclear Waste Regulatory Analyse, All tags... DCE, DO, DST, Drift Scale Test, EDTA, EM, EMSP, ERD, ERDC, ERSP, Ecosystems Research Division, Environmental Management Science Program, Environmental Remediation Science Program, GMS, Groundwater Modeling System, HE, INL, ISCMEM, Idaho National Laboratory, Interagency Steering Committee on Multimed, LBNL, LLNL, Lawrence Berkeley National Laboratory, Lawrence Livermore National Laboratory, NABIR, NTS, Natural and Accelerated Bioremediation Rese, Nevada Test Site, OBER, ORNL, OST, Oak Ridge National Laboratory, Office of Biological and Environmental Resea, Office of Environmental Management, Office of Science and Technology, PNNL, Pacific Northwest National Laboratory, RWMC, Radioactive Waste Management Complex, SCM, TCE, U.S. Army Corps of Engineers, U.S. Army Engineer Research and Development, U.S. Department of Defense, U.S. Department of the Army, U.S. Nuclear Regulatory Commission, USACE, USDOA, USDOD, USNRC, WIPP, Waste Isolation Pilot Plant, and xylene, benzene, dichloroethylene, dissolved oxygen, ethylbenzene, ethylenediaminetetraacetic acid, high explosive, surface complexation model, toluene, trichlorethylene, Fewer tags

LandCast Projected Population 2050

Developed by the Oak Ridge National Laboratory (ORNL), the LandCast 2050 High-Resolution Population Projection models future national-level human population densities. The models estimate the probability of a population being at a particular location, which measures where people will likely be in the future, not necessarily their places of residence.The LandCast 2050 data set is an empirically-informed spatial distribution of projected population of the contiguous U.S. for 2050 compiled on a 30” x 30” latitude/longitude grid. Population projections of county level numbers were developed using a modified version of the U.S. Census’ projection methodology-with the U.S. Census’ official projection as the benchmark....

Categories: Data; Types: ArcGIS REST Map Service, ArcGIS Service Definition, Downloadable, Map Service; Tags: 2050, Academics & scientific researchers, AppLCC, AppLCC, Appalachian, All tags... Conservation NGOs, Data, Data.gov Appalachian Landscape Conservation Cooperative, Datasets/Database, Federal resource managers, Hunters & anglers, Interested public, LCC Network Science Catalog, Landcast, ORNL, ORNL, Oak Ridge, Policy makers & regulators, Private land owners, Regional & county planners, State agencies, Tribes, completed, densities, human, population, projected, society, Fewer tags