Description System Requirements Downloads: Installation and Start-Up Technical Support

Description  Back to Top

VLEACH is a one-dimensional, finite difference model for making preliminary assessments of the effects on ground water from the leaching of volatile, sorbed contaminants through the vadose zone. The program models four main processes: liquid-phase advection, solid-phase sorption, vapor-phase diffusion, and three-phase equilibration. In an individual run, VLEACH can simulate leaching in a number of distinct polygons, which may differ in terms of soil properties, recharge rates, depth of water, or initial conditions. Modeling results in an overall, area-weighted assessment of ground-water impact.

Minimum System Requirements   Back to Top

To run VLEACH, you will need the following:

• IBM PC/AT or compatible
• (MS/PC) DOS version 2.0 (or higher)
• Color Graphic Adapter (CGA) board
• 256 Kb of RAM
• Math co-processor (recommended)
• FORTRAN Compiler for modifications of source code (recommended)
• Commercial graphics software (recommended)

Installation and Start-Up  Back to Top

Getting Started:

You will need unzipping (compression) software to uncompress ZIP files. If you need to load compression software on your computer, free software is available for download on the internet at the following sites:

http://www.pkunzip.com -  PKUNZIP home page
http://www.cdrom.com/pub/infozip - InfoZip Wiz

You will need Adobe Acrobat Reader to view the documentation (PDF) files. The Reader is available free from Adobe at the sites below:

http://www.adobe.com - Adobe Reader download page
ftp://ftp.adobe.com - Adobe anonymous ftp home page

Installing the Program:

Two files are available for download:

• vleach.zip (143 Kb): Program files
• vleach.pdf (374 Kb): User's Manual

1. Go to Windows Explorer and create a directory (folder) named VLEACH.
2. Download VLEACH.ZIP and VLEACH.PDF to the new VLEACH directory.
3. Unzip VLEACH.ZIP to the VLEACH directory.
4. Review the Users Manual (VLEACH.PDF) for instruction on running the model.

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