SHORT COURSE & WORKSHOP on HYDRUS
Utrecht University - October17-19, 2005
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SHORT COURSE & WORKSHOP on HYDRUS Utrecht University - October17-19, 2005 |
| HYDRUS Short Course & Workshop |
Soil and groundwater pollution is an ever-increasing, worldwide problem. Tens of billions of dollars are spent each year in Europe, the United States and elsewhere to remediate groundwater pollution, and to limit or prevent future contamination of the subsurface. Most subsurface pollution problems stem from activities involving the unsaturated (vadose) zone between the soil surface and the groundwater table. Consequently, the unsaturated zone provides the best opportunities to limit or prevent groundwater pollution. Once contaminants enter the saturated zone, remediation costs increase substantially.
Numerical modeling is becoming an increasingly important tool for analyzing complex problems involving water flow and contaminant transport in the unsaturated zone. This course is designed to familiarize participants with the principles and numerical analysis of variably-saturated flow and transport processes, and the application of state-of-the-art numerical codes to site-specific subsurface flow and transport problems.
This short course is intended for individuals with basic flow and/or transport modeling experience and some knowledge of unsaturated zone hydrology. It will be held at Utrecht University on 17 - 19 October, 2005, organized by Prof. S.M. Hassanizadeh and Saeed Torkzaban.
This three-day short course and workshop begins with a detailed conceptual and mathematical description of water flow and solute transport processes in the vadose zone, followed by an overview of the use of finite element techniques for solving the governing flow and transport equations. Special attention is given to the highly nonlinear nature of the governing flow equation. Alternative methods for describing and modeling the hydraulic functions of unsaturated porous media are also described.
"Hands-on" computer sessions will provide participants an opportunity to become familiar with the Windows-based RETC, STANMOD, HYDRUS-1D, 2D software packages. HYDRUS-3D will be presented and demonstrated for the first time. Emphasis will be on the preparation of input data for a variety of applications, including flow and transport in a deep vadose zone, nonlinear nonequilibrium solute transport, variably-saturated flow through a dam, flow and transport to a tile drain, and two-dimensional leachate migration from a landfill through the unsaturated zone into groundwater. Calibration will be discussed and demonstrated using both one-and two-dimensional model inversion.
The course introduces a new generation of Windows-based numerical models for simulating water flow and solute transport in variably-saturated porous media. Two numerical models (HYDRUS-1D, 2D, for one-and two-dimensional simulations, respectively) will be available during the course. All models are supported by interactive graphics-based interfaces for data-preprocessing, generation of unstructured as well as structured finite element grid systems, and graphic presentation of the simulation results. The Windows-based versions of the RETC (for quantifying the hydraulic functions of unsaturated soils) and STANMOD (for evaluating solute transport in the subsurface using analytical solutions of the convection-dispersion equation) codes will also be demonstrated in the course. The Hydrus-1D and RETC code will be provided to all participants.
Course handouts include lecture notes prepared by the instructors, documentation of the RETC (including the software) and STANMOD codes, and documentation of the HYDRUS-1D and HYDRUS-2D numerical models.