| Robert T. Pack
Civil and Environmental Engineering Utah State University Logan, Utah 84322-4110 rtpack<at symbol>cc.usu.edu |
David Tarboton
Water Program, Utah Water Research Laboratory Utah State University Logan, Ut 84322-8200 david.tarboton<at symbol>usu.edu |
Craig N. Goodwin Aquatic, Watershed and Earth Resources Utah State University Logan, Utah 84322-5230 cngoodwin<at symbol>bellsouth.net |
Ajay Prasad |
SINMAP 2.0 (Stability Index MAPping) is an ArcGIS 9.x ArcMap Add-in which implements the computation and mapping of a slope stability index based upon geographic information, primarily digital elevation data. SINMAP has its theoretical basis in the infinite plane slope stability model with wetness (pore pressures) obtained from a topographically based steady state model of hydrology. Digital elevation model (DEM) methods are used to obtain the necessary input information (slope and specific catchment area). Parameters are allowed to be uncertain following uniform distributions between specified limits. These may be adjusted (and calibrated) for geographic “calibration regions” based upon soil, vegetation or geologic data. The methodology includes an interactive visual calibration that adjusts parameters while referring to observed landslides. The calibration involves adjustment of parameters so that the stability map “captures” a high proportion of observed landslides in regions with low stability index, while minimizing the extent of low stability regions and consequent alienation of terrain to regions where landslides have not been observed. This calibration is done while simultaneously referring to the stability index map, a specific catchment area and slope plot (of landslide and non landslide points) where lines distinguish the zones categorized into the different stability classes and a table giving summary statistics.
SINMAP 2.0 is available for Windows operating systems that support ArcGIS for Windows from Environmental Systems Research Institute, Inc. (ESRI). ArcGIS is used for GIS display functionality. SINMAP has been tested with ArcGIS 9.0 and 9.1 and requires either ArcView, ArcEditor or ArcInfo licences. Sinmap source code is available for those who may not have ArcGIS or want to try implement the system on a different system.
Distribution
Copyright (C) 2005 David Tarboton, Utah State University
This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License version 2, 1991 as published by the Free Software Foundation.
This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
The distribution for SINMAP 2.0 for ArcGIS 9.x comprises the following:
SINMAP 2.0 setup.exe (10 Mb) An installshield setup file that installs the SINMAP dynamic link libraries, users manual and example data files.
sinmap2.pdf. (1335KB) Copy of the user's manual in Adobe Acrobat format. This document also includes 3 case studies in British Columbia. To read this you need the free Adobe Acrobat (TM) Reader.
example.zip. (314KB) A zip file containing the following four files that comprise a small test example.
sample.asc. ASCII file of digital elevation model data.
samplels.shp, samplels.shx, samplels.dbf. ArcView shape files for point landslide sample data. All 3 files comprise ONE shape file.