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Global Change Master Directory (GCMD)
A Fortran Program for Transient Rainfall Infiltration and Grid-Based Regional Slope-Stability Analysis
Entry ID: USGS_TRIGRS


Summary
Abstract: TRIGRS (Transient Rainfall Infiltration and Grid-based Regional Slope-Stability Model) is a Fortran program for computing transient pore-pressure changes, and attendant changes in the factor of safety, due to rainfall infiltration using the method outlined by Iverson (2000). We have extended Iverson's (2000) method by implementing the solution for complex storms, a solution for additional basal boundary conditions, and a simple runoff-routing scheme. The program operates on a gridded elevation model of a map area and accepts input from a series of ASCII text files. Infiltration, hydraulic properties, and slope stability input parameters are allowed to vary over the grid area thus making it possible to analyze complex storm sequences over geologically complex terrain. The optional routing scheme achieves mass balance between rainfall input, infiltration, and runoff over the entire grid by allowing excess water to flow to downslope cells that are receiving less direct precipitation than they are able to absorb. The program saves output to a series of text files that can be imported to GIS software for display or further analysis.

Related URL
Link: DOWNLOAD SOFTWARE
Description: Download TRIGRS.


Link: VIEW RELATED INFORMATION
Description: TRIGRS report.

ISO Topic Category
ENVIRONMENT
GEOSCIENTIFIC INFORMATION


Quality
This open-file report was prepared by an agency of the United States Government. Neither the United States Government nor any agency thereof nor any of their employees makes any warranty, expressed or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed in this report or represents that its use would not infringe privately owned rights. Reference therein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise does not constitute or imply its endorsement, recommendation, or favoring by the United States Government or any agency thereof.

Although all data and software in this open-file report have been used by the USGS, no warranty, expressed or implied, is made by the USGS as to the accuracy of the data and related materials and (or) the functioning of the software. The act of distribution shall not constitute any such warranty, and no responsibility is assumed by the USGS in the use of these data, software, or related materials.


Keywords
Slope Stability
Slope
Landslides
Landscape
Infiltration


Personnel
TYLER B. STEVENS
Role: SERF AUTHOR
Phone: 301-851-8113
Email: Tyler.B.Stevens at nasa.gov
Contact Address:
5700 Rivertech Court
City: Riverdale
Province or State: MD
Postal Code: 20737
Country: USA


LYNN M. HIGHLAND
Role: TECHNICAL CONTACT
Phone: (800) 654-4966
Fax: (303) 273-8600
Email: highland at usgs.gov
Contact Address:
US Geological Survey
National Landslide Hazards Program
National Landslide Information Center
MS 966, Box 25046
Denver Federal Center
City: Denver
Province or State: CO
Postal Code: 80225
Country: USA


Extended Metadata Properties
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Creation and Review Dates
SERF Creation Date: 2008-04-10
SERF Last Revision Date: 2018-10-22



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