Models

This list of Models contains only a sampling of possible entries. More models may be found in the following sources:

Atmospheric Sciences Modeling Division - part of NOAA's Air Resources Laboratory, contains information about atmospheric models.

Center for Exposure Assessment Modeling (CEAM) - provides predictive exposure assessment models for aquatic, terrestrial, and multimedia pathways for organic chemicals and metals.

Center for Subsurface Modeling Support (CSMoS) - source for publicly available ground-water and vadose zone modeling software and services.

Computational Toxicology - The application of mathematical and computer models to predict adverse effects and to better understand the mechanisms through which a given chemical induces harm.

Council on Regulatory Environmental Modeling (CREM) - promotes consistency and consensus within the Agency on mathematical modeling issues including model guidance, development, and application, and enhances both internal and external communications on modeling activities.

Support Center for Regulatory Air Models (SCRAM) - source of information on atmospheric dispersion (air quality) models that support regulatory programs required by the Clean Air Act.

Vehicle & Engine Emission Modeling Software - source for vehicle and engine emission software including MOBILE5, MOBILE6, PART5, Nonroad and fuel models.

ABEL Model - Evaluates a corporation's claim that it cannot afford compliance costs, clean-up costs or civil penalties.
ADL Migration Exposure Model - Developed to estimate the migration of chemicals from polymeric materials used in home environments where these chemicals could become sources of indoor air pollution or potable water contamination. An exposure assessment model can then be used to estimate exposure.
AQUATOX: A Simulation Model for Aquatic Ecosystems - AQUATOX is a freshwater ecosystem simulation model. It predicts the fate of various pollutants, such as nutrients and organic toxicants, and their effects on the ecosystem, including fish, invertebrates, and aquatic plants. AQUATOX is a valuable tool for ecologists, water quality modelers, and anyone involved in performing ecological risk assessments for aquatic ecosystems.
Assessment Tools for the Evaluation of Risk (ASTER) - Developed to assist regulators in performing ecological risk assessments by providing high quality data for discrete chemicals.
BEN Model - Calculates a violator's economic savings from delaying and/or avoiding pollution control expenditures.
Better Assessment Science Integrating Point and Nonpoint Sources (BASINS) - A multipurpose environmental analysis system for use by state, regional, and local agencies in performing watershed- and water- quality based studies.
CASHOUT Model - Calculates the present value of cleanup costs for a given Superfund site.
CHEMFLO -One-Dimensional Water and Chemical Movement in Unsaturated Soils - one-dimensional screening level model for simulating water and chemical movement in unsaturated soils.
Chesapeake Bay Community Watershed Model -
CORMIX for Mixing Zones - A mixing zone model that can be used to assess water quality impacts from point source discharges at surface or sub-surface levels.
Enhanced Stream Water Quality Model (QUAL2E) - A water quality planning tool for developing total maximum daily loads (TMDLs) and can also be used in conjunction with field sampling for identifying the magnitude and quality characteristics of nonpoint sources.
EPA Model Clearinghouse
Green Cross Solar - available from CEAM
Gridded Model Information Support System
Hydrologic Evaluation of Landfill Performance Model
INDIPAY Model - Evaluates an individual taxpayer's claim that it cannot afford compliance costs, clean-up costs or civil penalties.
Kinetics Model and Ozone Isopleth Plotting Package - available from SCRAM
Lake Analysis Management System
Landfill Air Emissions Estimation Model - Used to estimate emissions of methane, carbon dioxide, nonmethane organic compounds, and hazardous air pollutants from municipal solid waste landfills.
Littoral Ecosystem Risk Assessment Model for Prediction of Risk of Chemical Stressors Entering the Aquatic Environment
Metal Speciation Equilibrium Model for Surface and Ground Water - available from CEAM
Modeling Capture Zones of Ground-Water Well Using Analytic Elements - available from CSMoS
MODFLOW and MODFLOW Manual - A series of twenty problem sets that illustrate by example the use of MODFLOW including modeling principles, input/output specifics, available options, rules of thumb, and common modeling mistakes.
Modular Semi-Analytical Model for the Delineation of Wellhead Protection Areas - available from CSMoS
Multi-Chamber Concentration and Exposure Model - Estimates average and peak indoor air concentrations of chemicals released from products or materials in houses, apartments, townhouses, or other residences.
Numerical Codes for Delineating Wellhead Protection Areas in Agricultural Regions Based on the Assimilative Capacity Criterion - available from CEAM
Parameter Estimation System for Aquifer Restoration Models - available from CSMoS
Personal Computer Graphical Exposure Modeling System
Pesticide Analytical Model - Vadose zone modeling of the transport of organic (pesticide) contaminants.
Prediction of Radiological Effects resulting from Shallow Trench Operation, consisting of PRESTO-EPA-CPG model and PRESTO-EPA-POP model - a computer model for evaluating radiation exposure from contaminated soil layers, including waste disposal, soil cleanup, agricultural land application, and land reclamation.
PRESTO-EPA-POP : An Operation System for Predicting the Population Health Effects from the Disposal of Radioactive Waste by Shallow Trenches - a computer model for evaluating radiation exposure from contaminated soil layers, including waste disposal, soil cleanup, agricultural land application, and land reclamation.
Probabilistic Dilution Model - Originally developed by the Office of Water, PDM estimates how often a given concentration of concern may be exceeded in receiving streams and was integrated into the Reach Scan program.
Project Model - Calculates the real cost to a defendant of a proposed supplemental environmental project.
ReachScan with Probabilistic Dillution Model and Endangered Species Database Link - ReachScan, the Probabalistic Dilution Model (PDM), and the Endangered Species Database (ESDB) have been integrated into one package for distribution. ReachScan is an integrated surface water modeling and database system to estimate surface water concentrations, and determine the presence of endangered species or critical habitats in the county of a releasing facility. See also, Exposure Assessment Tools and Models
Regulatory and Investigative Treatment Zone Model (RITZ) - Vadose zone modeling of the transport of contaminants associated with oily wastes.
Retension Curve Computer Code (RETC) - Uses theoretical methods to predict the soil water retention curve and the hydraulic conductivity curve from measured soil water retention data
Soil Transport and Fate Database - Provides information concerning the behavior of organic and a few inorganic chemicals in the soil environment.
Soil Venting Model - available from CSMoS
Two-Dimensional Finite Element Program for Multiphase Flow and Multicomponent Transport (MOFAT) - Two-dimensional flow and transport of three fluid phases: water, nonaqueous phase liquid, and gas.
Vadoze Zone Leaching Model - Simulation of 1-D water and chemical movement in vadose zone.

Models

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