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Model Report

BIOPLUME III

Last Revision Date: 07/11/2011 View as PDF
General Information Back to Top
Model Abbreviated Name:

BIOPLUME III
Model Extended Name:

BIOPLUME III
Model Overview/Abstract:
Bioplume II is a two-dimensional finite difference and Method of Characteristics (MOC) model for simulating the natural attenuation of organic contaminants in ground water due to the processes of advection, dispersion, sorption and biodegradation. The transport simulation in Bioplume III is based on the USGS solute transport code MOC. The program solves the solute transport equation six times to determine the fate and transport of the hydrocarbons and electron acceptors (oxygen, nitrate, ferric iron, sulfate, and carbon dioxide). Three different kinetic expressions can be used to simulate the aerobic and anaerobic biodegradation reactions. These include: first-order decay, instantaneous reaction and Monod kinetics. The principle of superposition is used to combine the hydrocarbon plume with the electron acceptor plumes.

The program provides a graphical user interface that allows the user to easily create, enter, and edit data for the Bioplume III simulation. The program requires discretization of the model domain in space and time. The model grid has a maximum size of 35 by 35 cells and can be run for up to 99 years. It requires the hydrogeologic characteristics of the aquifer, initial and boundary conditions, sources and sinks, sorption parameters, source decay rate, radioactive decay rate, electron acceptor concentrations, and ion exchange parameters. Model output includes the groundwater flow field heads, and electron acceptor and hydrocarbon plume concentrations in graphical and spreadsheet form.

Keywords:
Model Technical Contact Information:
Agency Contact:
Center for Subsurface Modeling Support
R.S. Kerr Environmental Research Center
(580) 436-8500
csmos.ada@epa.gov

The computer code was developed by Groundwater Services, Inc. for the U.S. Air Force and the U.S. EPA. The model is maintained and supported by the U.S. EPA, Office of Research and Development, National Risk Management Research Laboratory (NRMRL), Center for Subsurface Modeling Support (CSMoS).

Model Homepage: http://www.epa.gov/nrmrl/gwerd/csmos/index.html

User Information Back to Top
Technical Requirements
Computer Hardware
Requires a minimum computational capability equivalent to an 80486 math co-processor.

Minimum: 16 MB RAM and 8 MB ROM

Compatible Operating Systems
Windows 95, 98, or later
Other Software Required to Run the Model
Fortran
Download Information
The model is publicly available from the U.S. EPA, Office of Research and Development, National Risk Management Research Laboratory (NRMRL), Center for Subsurface Modeling Support (CSMoS) at the following link: http://www.epa.gov/nrmrl/gwerd/csmos/models/bioplume3.html

To receive the model on magnetic or optical media, send blank CDs, ZIP disks, or 3.5" floppy diskettes to:

The Center for Subsurface Modeling Support (CSMoS)
R.S. Kerr Environmental Research Center
P.O. Box Box 1198
Ada, OK 74820

CSMoS will copy the requested models and mail them to the requestor.

Using the Model
Basic Model Inputs
Site-specific inputs include: aquifer hydrogeological properties, initial heads, boundary conditions, initial concentrations of source hydrocarbons, and background electron acceptors.
User Support
User's Guide Available?
Calibration requirements include site measured water levels and contaminant & electron acceptor concentrations at observation wells.

Documentation can be downloaded from:

http://www.epa.gov/nrmrl/gwerd/csmos/models/bioplume3.html

To receive a paper copy of the user's manuals, send requests for hard copies to:

The Center for Subsurface Modeling Support (CSMoS)
R.S. Kerr Environmental Research Center
P.O. Box 1198
Ada, OK 74820

CSMoS will mail the requested manuals to the requestor.

To receive the user's manual on magnetic or optical media, send blank CDs, ZIP disks, or 3.5" floppy diskettes to the address above and CSMoS will copy the requested manuals to the disks and return them to the requester. User's Guide provides:

  1. an abstract or abstract equivalent in the introduction
  2. schematic/diagram showing model structure and interaction of model components
  3. equations, equation solution methodologies, and related simplifying assumptions
  4. example input/output files
  5. input and output variable documentation including definitions, units, temporal/spatial dimensions, temporal/spatial resolution options, and (if applicable such as with FORTRAN) format
  6. guidance on selecting and/or estimating values and/or distributions for input variables (including guidance on calibration and selecting default values and/or distributions)
  7. guidance on the analysis and interpretation of output
  8. description of sensitivity analysis, uncertainty analysis, and testing (validation) methodologies and results
User Qualifications
User needs only moderate level of technical education and/or modeling experience. User should have an understanding of ground water flow and contaminant transport governing equations and the solutions to these equations. User should also understand the physical and chemical processes inherent to natural attenuation.

Model Science Back to Top
Summary of Model Structure and Methods
The model uses flexible (user-defined) units. The model provides mathematical guidance to assist the user when selecting modeling parameters. Governing equations are solved numerically.
Model Evaluation
Moderate model testing (evaluation) was performed by comparing model outputs to field data at a few sites. A sensitivity analysis for the hydrogeologic, chemical, and biodegradation parameters was tested by the authors and is reported in the user's manual.

The program and user's manual were internally peer reviewed by EPA's Office of Research and Development, Subsurface Protection and Remediation Division through the Center for Subsurface Modeling Support.

The program and user's manual were externally reviewed by outside peer reviewers and beta testers. The comments from these testers were reviewed by EPA's Office of Research and Development, Subsurface Protection and Remediation Division.


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