U.S. flagAn official website of the United States government
                    Here's how you know **Official websites use .gov**
                            
                            A **.gov** website belongs to an official government organization in the United States.
 **Secure .gov websites use HTTPS**
                            
                            A **lock** (                            
                              A locked padlock                                                      
                            
                            ) or **https://** means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.


Menu Agricultural Research Service
						
                    U.S. DEPARTMENT OF AGRICULTURE
 Agricultural Water Efficiency and Salinity Research Unit: Riverside, CA
 close



    Research

                    Research Projects
                                    Publications
                                    Collaborations
                                    News
                                    Software
                People

                    Staff Listing
                                    Careers


        


                    US Salinity Lab
                        FAQ about salinity
                                    Publications
                                    History
                                    Scientific ModelsSearch small
                    Search
            
            ARS Home
                                About ARS
                                Contact Us




ARS Home Pacific West Area Riverside, California Agricultural Water Efficiency and Salinity Research Unit Docs Model





- Home Page
- USSL Publications
- Special Publications
- Models
- Research Databases

CFITM Modelheadline bar Year: 1980Version: 1.0Abstract:Predictions of solute transport in the field are generally based upon convective-dispersive type transport equations. The one-dimensional form of this equation contains two parameters which must be determined beforehand. They are the dispersion coefficient and a distribution coefficient, the latter acounting for adsorption or exchange between the liquid and solid phases. Both coefficients can be obtained by fitting an analytical solution of the one-dimensional convective-dispersive transport equation to observed column effluent data. CFITM describes a non-linear least-squares curve-fitting computer model which may be used for that purpose. The program considers analytical solutions of the convection-dispersion equation for both finite and semi-infinite porous media.The code comes with a user manual giving detailed instructions for data input preparation. Sample input and output files are also provided.
Reference:
M. Th. van Genuchten. 1980. Determining Transport Parameters from Solute Displacement Experiments, Version 1.0. Research Report No. 118, U.S. Salinity Laboratory, USDA, ARS, Riverside, California.
**Technical contact**:Todd SkaggsUSDA-ARS U.S. Salinity Laboratory450 W Big Springs RoadRiverside, CA 92507-4617Tel: 951-369-4853Fax: 951-342-4964Todd.Skaggs@ars.usda.gov


Return to top


Connect with ARS Sign up


ARS Home
                            USDA.gov
                            Plain Writing
                            Policies & Links
                            Civil Rights Statements
                            FOIA
                            Accessibility Statement
                            Privacy Policy
                            Non-Discrimination Statement
                            Quality of Information
                            USA.gov
                            WhiteHouse.gov