Link to USGS home page.
Techniques and Methods

GoPhast: A Graphical User Interface for PHAST

By Richard B. Winston

Techniques and Methods 6-A20

This report is available as a pdf.


ABSTRACT

GoPhast is a graphical user interface (GUI) for the USGS model PHAST. PHAST simulates multicomponent, reactive solute transport in three-dimensional, saturated, ground-water flow systems. PHAST can model both equilibrium and kinetic geochemical reactions. PHAST is derived from HST3D (flow and transport) and PHREEQC (geochemical calculations). The flow and transport calculations are restricted to constant fluid density and constant temperature. The complexity of the input required by PHAST makes manual construction of its input files tedious and error-prone. GoPhast streamlines the creation of the input file and helps reduce errors. GoPhast allows the user to define the spatial input for the PHAST flow and transport data file by drawing points, lines, or polygons on top, front, and side views of the model domain. These objects can have up to two associated formulas that define their extent perpendicular to the view plane, allowing the objects to be three-dimensional. Formulas are also used to specify the values of spatial data (data sets) both globally and for individual objects. Objects can be used to specify the values of data sets independent of the spatial and temporal discretization of the model. Thus, the grid and simulation periods for the model can be changed without respecifying spatial data pertaining to the hydrogeologic framework and boundary conditions. This report describes the operation of GoPhast and demonstrates its use with examples. GoPhast runs on Windows 2000, Windows XP, and Linux operating systems.

CONTENTS

Abstract

Introduction

Basic Concepts

Initial Dialog Boxes

Main Window

Generating Grids

Interpolation Methods

PHAST-Style Interpolation

Formulas

Creating, Selecting, and Editing Objects in GoPhast

Main Menu and Buttons

Examples

Summary

Acknowledgments

References Cited

Appendix 1. Tools for Programmers

Appendix 2. Running GoPhast from the Command Line


Suggested citation:
Winston, R.B., 2006, GoPhast: A Graphical User Interface for PHAST: U.S. Geological Survey Techniques and Methods 6-A20, 98 p.


This report is available online in Portable Document Format (PDF). If you do not have the Adobe Acrobat PDF Reader, it is available for free download from Adobe Systems Incorporated.

Download the report (PDF, 1.4 MB)

Document Accessibility: Adobe Systems Incorporated has information about PDFs and the visually impaired. This information provides tools to help make PDF files accessible. These tools convert Adobe PDF documents into HTML or ASCII text, which then can be read by a number of common screen-reading programs that synthesize text as audible speech. In addition, an accessible version of Acrobat Reader 5.0 for Windows (English only), which contains support for screen readers, is available. These tools and the accessible reader may be obtained free from Adobe at Adobe Access.



U.S. Department of the Interior, U.S. Geological Survey
Persistent URL: http://pubs.water.usgs.gov/tm6a20
Page Contact Information: GS Pubs Web Contact
Last modified: Wednesday, January 09 2013, 03:48:57 PM
FirstGov button  Take Pride in America button