Methods, Models, Tools, and Databases for Water Research

Methods

  • Bacteria Methods
  • Biological Methods and Manual Development
    EPA's research in stream and source monitoring indicators includes fish, macroinvertebrates, periphyton, zooplankton, functional ecosystem indicators, water and sediment toxicity, and fish tissue contaminants. EPA exposure scientists regularly prepare and update field and laboratory protocol and methods manuals. They also provide technical assistance to EPA regions, program offices and states on the implementation and interpretation of these manuals. This website lists currently available manuals and protocols.
  • Coliphage Methods
  • Drinking Water Methods
  • Protozoan Methods
  • Regional Vulnerability Assessment (ReVA)
    EPA's ReVA program is an approach to regional scale, priority-setting assessment by integrating research on human and environmental health, ecorestoration, landscape analysis, regional exposure and process modeling, problem formulation, and ecological risk guidelines.
  • Virus Methods
    (EPA Manual of Methods for Virology) Twelve chapters. The individual chapters were prepared as ASCII text files to be viewed/printed with a monospaced font. It is planned to make them also available in PDF format in the future. The manual (EPA 600-4-84-013) describes in detail procedures for detecting viruses in environmental samples. 

Models

  • Better Assessment Science Integrating point & Non-point Sources (BASINS)
    BASINS is a multi-purpose environmental analysis system that integrates a geographical information system (GIS), national watershed data, and state-of-the-art environmental assessment and modeling tools into one convenient package.
  • Bioaccumulation in Aquatic Systems Simulator (BASS)
    BASS is a model that simulates population and bioaccumulation dynamics of age-structured fish communities. While BASS was designed to investigate bioaccumulation of chemicals within community or ecosystem contexts, it also allows EPA to evaluate various dimensions of fish health associated with non-chemical stressors. Accurate bioaccumulation estimates help predict realistic dietary exposures to humans and fish-eating wildlife.
  • NAPL Simulator
    This model simulates the contamination of soils and aquifers that results from the release of organic liquids, commonly referred to as nonaqueous-phase liquids (NAPLs).
  • Optimal Well Locator (OWL)
    This model evaluates existing monitoring well networks and optimizes the selection of new monitoring well locations.
  • REMchlor
    This model simulates the transient effects of groundwater source and plume remediation. This is a contaminant source model based on a power-function relationship between source, mass, and discharge. It can consider partial source remediation at any time after release. The source model is a time-dependent, mass-flux boundary condition to the analytical plume model (one-dimensional flow), which simulates first-order sequential decay and production of several species. This model also calculates cancer risks posed by carcinogenic species.
  • ReVA
    EPA's Regional Vulnerability Assessment (ReVA) program is an approach to regional scale, priority-setting assessment by integrating research on human and environmental health, ecorestoration, landscape analysis, regional exposure and process modeling, problem formulation, and ecological risk guidelines.
  • Environmental Fluid Dynamics Code (EFDC)
    EFDC is a state-of-the-art hydrodynamic model that can be used to simulate aquatic systems in one, two, and three dimensions. It is a multifunctional surface water modeling system, which includes hydrodynamic, sediment-contaminant, and eutrophication components.
  • EPANET
    EPANET is software that models water distribution piping systems. It performs extended-period simulation of the hydraulic and water quality behavior within pressurized pipe networks.
  • Exposure Analysis Modeling System (EXAMS)
    EXAMS is an interactive software application for formulating aquatic ecosystem models and rapidly evaluating the fate, transport, and exposure concentrations of synthetic organic chemicals including pesticides, industrial materials, and leachates from disposal sites.
  • FOOTPRINT
    FOOTPRINT simulates the length and surface area of BTEX plumes in groundwater, when the plumes are produced from a gasoline spill that contains ethanol.
  • MINTEQA2
    MINTEQA2 is a equilibrium speciation model that can be used to calculate the equilibrium composition of dilute aqueous solutions in the laboratory or in natural aqueous systems. The model is useful for calculating the equilibrium mass distribution among dissolved species, adsorbed species, and multiple solid phases under a variety of conditions including a gas phase with constant partial pressures.
  • River and Stream Water Quality Model (QUAL2K)
    QUAL2K (or Q2K) is a river and stream water quality model that is intended to represent a modernized version of the QUAL2E (or Q2E) model (Brown and Barnwell 1987).
  • Storm Water Management Model (SWMM)
    This general purpose urban hydrology and conveyance system hydraulics software is a dynamic rainfall-runoff simulation model used for single event or long-term (continuous) simulation of runoff quantity and quality from primarily urban areas.
  • Virulo
    Virulo is a probabilistic screening model for predicting leaching of viruses in unsaturated soils. Monte Carlo is employed to generate ensemble simulations of virus attenuation. The probability of failure is generated to achieve a user-chosen degree of attenuation.
  • VLEACH
    VLEACH is a one-dimensional, finite difference model for making preliminary assessments of the effects on groundwater from the leaching of volatile, sorbed contaminants through the vadose zone. The program models four main processes: liquid-phase advection, solid-phase sorption, vapor-phase diffusion, and three-phase equilibration.
  • WhAEM
    This program delineates capture zones and isochrones of groundwater residence time for the purpose of wellhead protection. Processes include steady state, homogeneous, isotropic, advection, and dispersion.
  • WHPA
    This model simulates capture zones for pumping wells. Processes include steady state and horizontal flow.

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Tools

  • HSPF Toolkit for BMP Modeling Applications (FTABLE)
    The Hydrological Simulation Program - FORTRAN (HSPF) Toolkit is a comprehensive package for simulation of watershed hydrology and water quality for both conventional and toxic organic pollutants. HSPF incorporates watershed-scale agricultural runoff management models and nonpoint source models into a basin-scale analysis framework that includes fate and transport in one dimensional stream channels. It is the only comprehensive model of watershed hydrology and water quality that allows integrated simulation of land and soil contaminant runoff processes with in-stream hydraulic and sediment-chemical interactions.
  • ReVA Data
    ReVA uses EPA's Environmental Information Management System (EIMS) to manage its library of projects, data sets, models, and documents. The EIMS database is a comprehensive resource for persons interested in environmental information. By accessing EIMS, you will be able to browse and review ReVA's current data, meetings, projects, and documents.
  • ReVA Tools and Projects 
    EPA's Regional Vulnerability Assessment (ReVA) program is designed to create the methods needed to understand a region's environmental quality and its spatial pattern. Impacts of human activities are not uniformly distributed across landscapes and regions (defined here as a multi-state area) and are often interacting in complex ways.
  • ReVA - Environmental Decision Toolkits under development
  • Stormwater Calculator
    The National Stormwater Calculator, a part of President Obama’s Climate Change Action Plan, is a desktop application that estimates the annual amount of stormwater runoff from a specific location in the United States (including Puerto Rico). Estimates are based on local soil conditions, land cover and historic rainfall records. The Calculator also includes changes in seasonal precipitation levels, the effects of more frequent high-intensity storms, and changes in evaporation rates based on validated Intergovernmental Panel on Climate Change climate vulnerability scenarios.
  • Supercomputer for Model Uncertainty and Sensitivity Evaluation (SuperMUSE)
    EPA’s Supercomputer for Model Uncertainty and Sensitivity Evaluation, or SuperMUSE, enhances quality assurance in environmental models and applications. Uncertainty analysis (UA) and sensitivity analysis (SA) remain critical, though often overlooked steps in the development and evaluation of computer models. As a result of the SuperMUSE hardware and software technology, EPA can now better investigate new and existing UA and SA methods. EPA can also more easily achieve UA/SA of complex, Windows-based environmental models, allowing scientists to conduct analyses that have, to date, been impractical to consider.
  • SUSTAIN
    SUSTAIN is a decision support system to facilitate selection and placement of Best Management Practices (BMPs) and Low Impact Development (LID) techniques at strategic locations in urban watersheds. It was developed to assist stormwater management professionals in developing implementation plans for flow and pollution control to protect source waters and meet water quality goals. From an understanding of the needs of the user community, SUSTAIN was designed for use by watershed and stormwater practitioners to develop, evaluate, and select optimal BMP combinations at various watershed scales on the basis of cost and effectiveness. SUSTAIN is a tool for answering the following questions:
    • How effective are BMPs in reducing runoff and pollutant loadings?
    • What are the most cost-effective solutions for meeting water quality and quantity objectives?
    • Where, what type of, and how big should BMPs be?
  • SSOAP TOOLBOX
    The SSOAP toolbox is a suite of computer software tools used for the quantification of RDII and help capacity analysis and condition assessment of sanitary sewer systems. This toolbox includes EPA’s Storm Water Management Model Version 5 (SWMM5) for performing dynamic routing of flows through the sanitary sewer systems.
  • Ubertool: Ecological Risk Web Application for Pesticide Modeling
    EPA scientists have developed a prototype cloud computing-base knowledge management system to support ecological risk decisions mandated under the Federal Insecticide, Fungicide, and Rodenticide Act (FIFRA) and the Endangered Species Act.  The “Ubertool” dashboard infrastructure integrates the processing of model results for over a dozen commonly-used EPA aquatic and terrestrial regulatory models and supporting datasets.
  • Virtual Beach (VB)
    When recreational waters are contaminated by bacteria and other microorganisms, beach managers need to act quickly to protect public health. EPA scientists developed Virtual Beach, a software suite that uses data on beach location, local hydrology, land use, wave height, and weather to create models that can predict bacteria and other waterborne pathogen outbreaks at saltwater and freshwater beaches before they happen. Using Virtual Beach, beach managers can issue same-day beach closures or health advisories to protect the health of swimmers and the surrounding community.
  • Watershed Health Assessment Tools Investigating Fisheries (WHATIF)
    WHATIF is software that integrates a number of calculators, tools, and models for assessing the health of watersheds and streams with an emphasis on fish communities in the Mid-Atlantic Highland region.

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Databases

  • Drinking Water Treatability Database
    The Drinking Water Treatability Database presents referenced information on the control of contaminants in drinking water. It allows drinking water utilities, first responders to spills or emergencies, treatment process designers, research organizations, academicians, regulators and others to access referenced information gathered from thousands of literature sources and assembled on one site.
  • Environmental Geophysics
    This website beta version contains information on geophysical methods, references to geophysical citations, and a glossary of geophysical terms related to environmental applications.
  • HELP
    A quasi-two-dimensional modeling program that simulates water movement into and out of landfills based on a waste management system=s particular design. The user can conduct water-balance analyses of solid waste disposal and containment facilities.
  • Landscape Ecology Data Browsers
  • MULTIMED
    A one-dimensional, steady-state model used to predict the concentration of contaminants migrating from a waste disposal facility via the subsurface, surface water, and air pathways to receptor sites.
  • PPCP (Reference Databases)
    Published Literature Relevant to the Issues Surrounding PPCPs as Environmental Contaminants
  • ReVA Data
    ReVA uses EPA's Environmental Information Management System (EIMS) to manage its library of projects, data sets, models, and documents. The EIMS database is a comprehensive resource for persons interested in environmental information. By accessing EIMS, you will be able to browse and review ReVA's current data, meetings, projects, and documents.
  • ReVA - Environmental Decision Toolkits under development
  • VLEACH
    A one-dimensional, finite difference model for making preliminary assessments of the effects on ground water from the leaching of volatile, sorbed contaminants through the vadose zone. The program models four main processes: liquid-phase advection, solid-phase sorption, vapor-phase diffusion, and three-phase equilibration.
  • Watershed Deposition Tool Data
  • WhAEM2000
    WhAEM2000 is a public domain and open source general purpose ground-water flow modeling system, with strengths in representing regional flow systems, and ground water/surface water interactions. Read the WhAEM Abstract.
  • WHPA
    A semi-analytical ground-water flow simulation program used for delineating capture zones in a wellhead protection area. The program consists of four computational modules (RESSQC, MWCAP, GPTRAC, MONTEC).
  • Virtual Field Reference Data Base VFRDB
    The Neuse River Basin VFRDB provides in situ reference measurement data for statistically rigorous accuracy assessments of land-cover maps derived from satellite and airborne remote sensing platforms.