| Version:
| 1.30
| Revision:
| 1989
|
| Availability:
| public domain, compiled (PC) version
|
| Model Category:
| unsaturated flow, solute transport
|
| Authors:
| Nofziger, D.L., K. Rajender, S.K. Nayudu, and P-Y. Su.
|
| Developer:
| Oklahoma State University
|
| Developer Address:
|
|
| Abstract:
| CHEMFLO is an interactive software system developed to enable decision-makers, regulators, policy-makers, scientists, consultants, and students to simulate movement of water and chemicals in unsaturated soils. The model was written as an educational tool. Water movement is modeled using Richards equation. Chemical transport is modeled with the convection-dispersion equation. The user defines soil properties, soil orientation, initial conditions, and boundary conditions using interactive screens. The partial differential equations are solved for the specified system using finite difference techniques. Results can be viewed in graphical and tabular forms. A user's manual is provided which details the equations solved and limitations of the model as well as operating instructions. A set of numerical experiments is provided to illustrate important unsaturated flow and transport concepts to the user. These serve as self-study aids or class assignments. CHEMFLO provides a good introduction to unsaturated flow and transport processes. With this knowledge, the user should be able to effectively use other vadose zone models for long term simulations.
|
| Distributor:
| U.S. EPA, Robert S. Kerr Environmental Research Center (RSKERC)
|
| Distributor Address:
| Center for Subsurface Modeling Support (CSMoS)
|
| Contact:
| CSMoS Director,
|
| Contact Dept:
| Unavailable
|
| Phone:
| 580-436-8586
| FAX:
| 580-436-8718
|
| Web Page URL:
| http://www.epa.gov/ada/kerrlab.html
|
| E-mail Address:
| csmos@ad3100.ada.epa.gov
|
| Comments for CHEMFLO
|
| Soil and chemical parameters required by the CHEMFLO model include: soil bulk density, water-soil partition coefficient, diffusion coefficient of chemical in water, dispersivity, first-order degradation rates for contaminant in the water and the solid phases, and a zero order rate constant for the liquid. Other parameters required for solving the Richards equation are the function relationships for soil-water retention and unsaturated hydraulic conductivity.
|
| The model is also available at http://clay.agr.okstate.edu/software/chemflo.htm
|
