Project Number: 5310-61000-009-02
Project Type: Specific C/A

Start Date: Jul 12, 2001
End Date: May 31, 2006

Objective:
The objective of this cooperative agreement is to develop and improve windows-based computer software that may be used to predict the fate and transport of agricultural chemicals (especially salts and toxic elements) in the subsurface, and to numerically and experimentally test several parts of the software. Documents SCA with UC-Riverside.

Approach:
New numerical techniques and matrix equation solvers will be developed and implemented in the HYDRUS codes simulating water, heat and solute movement in variably-saturated porous media. The software packages will be modified to include the effects of preferential flow. For this purpose, transient versions of newly formulated dual-porosity and dual-permeability modules for water flow and solute transport will be incorporated. The preferential flow features will be tested against infiltration data obtained for fractured rock samples from DOE's Yucca Mountain site in Nevada. Additional tests will be carried out using data from the San Joaquin Valley of California in efforts to formulate and test alternative water and salinity management practices. Graphical interfaces will be developed for a 3-dimensional version, HYDRUS-3D. The HYDRUS codes will be augmented with newly developed pedotransfer functions (PTFs) that estimate the hydraulic properties from available soil taxonomic data. Accuracy of the PTFs will be tested against independent data collected at DOE's Hanford (WA) site.

Project Team

Van Genuchten, Martinus - Rien Shouse, Peter - Pete Skaggs, Todd Jiri Simunek - Soil Scientist, Ucr (909)369-4847

Project Annual Reports

FY 2003   FY 2002   FY 2001

Related National Programs

Water Quality & Management (201)   Soil Resource Management (202)