Science Inventory

Citation:

Description:

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.

Record Details:

Organization:

Model Detail:

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.
Model URL: http://www.epa.gov/ada/csmos/models.html
Model Guidance Documents: Calibration requirements include: site measured water levels and contaminant & electron acceptor concentrations at observation wells.

Documentation can be downloaded from:

http://www.epa.gov/ada/csmos/models.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 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 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 manuals to the disks and return them to the requester.

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, and (8) description of sensitivity analysis, uncertainty analysis, and testing (validation) methodologies and results.
Model 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).

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.
modelcontactinfo: U.S. EPA
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 Inputs: Site-specific inputs include: aquifer hydrogeological properties, initial heads, boundary conditions, initial concentrations of source hydrocarbons, and background electron acceptors.

Model Computer Requirements:

Minimum: 16 MB RAM and 8 MB ROM
Model Programming Language(s): Model has a GUI.

Program provides contours of aquifer properties such as thickness, hydraulic conductivity, elevation, etc. The program also provides contours of initial/simulated heads, initial concentrations and spectral contours of simulated concentrations
other_req: Fortran