biochlor22

biochlor22 - BIOCHLOR Natural Attenuation Decision Support...

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BIOCHLOR Natural Attenuation Decision Support System Version 2.2 March 2002 User’s Manual Addendum SURFACE TOP OF WATER-BEARING UNIT BOTTOM OF WATER-BEARING UNIT by Carol E. Aziz, Ph.D. and Charles J. Newell, Ph.D., P.E. Groundwater Services, Inc. Houston, Texas James R. Gonzales Technology Transfer Division Air Force Center for Environmental Excellence Brooks AFB, San Antonio, Texas Project Officer David G. Jewett Subsurface Protection and Remediation Division National Risk Management Research Laboratory Ada, Oklahoma 74820
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i DISCLAIMER BIOCHLOR is made available on an as-is basis without guarantee or warranty of any kind, express or implied. The United States Government, Groundwater Services, Inc., the authors, and the reviewers accept no liability resulting from the use of BIOCHLOR or its documentation. Implementation of BIOCHLOR and interpretation of the predictions of the model are the sole responsibility of the user.
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ii TABLE OF CONTENTS BIOCHLOR Natural Attenuation Decision Support System Air Force Center for Environmental Excellence Technology Transfer Division Section Page No. INTRODUCTION. ................................................................................................................................... 1 NEW FEATURES IN VERSION 2.2. ...................................................................................................... 1 RATE CONSTANT DECISION SUPPORT FOR ESTIMATING RATE CONSTANTS . ............... 1 SOURCE DECAY. .................................................................................................................................... 3 ANIMATION FOR CENTERLINE OUTPUT. ....................................................................................... 4 REVISED FEATURES . .............................................................................................................................. 5 TROUBLESHOOTING TIPS. .................................................................................................................. 5 MINIMUM SYSTEM REQUIREMENTS. ................................................................................................. 6 APPENDICES A.1 DOMENICO ANALYTICAL MODEL WITH DECAYING SOURCE. ................................................ 7 A.2 ACKNOWLEDGMENTS . ................................................................................................................. 9
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BIOCHLOR ADDENDUM March 2002 1 INTRODUCTION BIOCHLOR is a screening model that simulates remediation by natural attenuation (RNA) of dissolved solvents in groundwater. The software, programmed in the Microsoft Excel spreadsheet environment and based on the Domenico analytical solute transport model, has the ability to simulate 1-D advection, 3-D dispersion, linear adsorption, and biotransformation via reductive dechlorination (the dominant biotransformation process at most chlorinated solvent sites). Dissolved solvent degradation is assumed to follow a sequential first order decay process. BIOCHLOR includes three different model types: 1. Solute transport without decay, 2. Solute transport with biotransformation modeled as a sequential first-order decay process, 3. Solute transport with biotransformation modeled as a sequential first-order decay process with 2 different reaction zones (i.e., each zone has a different set of rate coefficient values). Groundwater Services, Inc., Houston, Texas, developed BIOCHLOR for the Air Force Center for Environmental Excellence (AFCEE) Technology Transfer Division at Brooks Air Force Base. The mathematical technique to solve the coupled reactive transport equations was developed by researchers formerly with the Battelle Pacific Northwest National Laboratory. New Features in Version 2.2 BIOCHLOR Version 2.2 includes the following new features: rate constant decision support, source decay, and animation. A rate constant decision support feature was incorporated to help users estimate rate constants required for model calibration. In addition to simulating a source of constant concentration, BIOCHLOR Version 2.2 models a decaying source, which allows the
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biochlor22 - BIOCHLOR Natural Attenuation Decision Support...

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