Utah Water Research Laboratory, Civil and Environmental Engineering
Department, Engineering Geomatics Laboratory, Utah State University
GIS Hydro '99
Distributed Hydrologic Modeling
This page describes research and software developed at Utah State University
as part of an effort to use Geographic Information System methodology in
Distributed Hydrologic Modeling. Two 'packages' are included.
SINMAP (Stability Index MAPping) is an ArcView extension that implements
the computation and mapping of a slope stability index based upon geographic
information, primarily digital elevation data. This has applications
in forest and watershed management, forestry and forest engineering.
Digital elevation model (DEM) data along with distributed soils data form
the basis for the slope stabiity modeling. The methodology includes
an interactive visual calibration that adjusts parameters while referring
to observed landslides.
SINMAP is available for the Windows 95/98/NT operating systems.
It utilizes the ArcView geographic information system (GIS) from Environmental
Systems Research Institute, Inc. (ESRI) for its standard GIS functionality
and requires the following versions (or higher) of:
ArcView GIS Version 3.0a for Windows
TARDEM is a suite of programs for the Analysis of Digital Elevation Data,
for the purposes of distributed hydrologic modeling and setting up hydrologic
model inputs. TARDEM includes programs to:
ArcView GIS Spatial Analyst Version 1.0a for Windows
Source code is also included for those who may not have these products
or want to try implement the system on a different system.
The programs all work directly with raster grid data in the ESRI binary
grid format accessible through the gridio application programmers interface
that is part of Spatial Analyst (version 1.0a or higher) with ArcView (version
3.0a or higher). The programs can also work directly off ASCII grid
format files. Source code is also included for those who may not have these
products or want to try implement the system on a different system.
Fill pits in digital elevation data.
Compute flow directions. Single and multiple flow directions with
geomorphically driven routing of flow across flats.
Contributing area based upon single and multiple flow directions.
Grid network ordering and path length computation.
Extract/map channel networks using a variety of methods (constant support
area, slope-area, path length-area, local curvature, grid network pruning
by order). Vector channel networks are derived from grid based data.
Perform analysis to objectively select channel network extraction parameters.
Partition a region into subbasins draining to channel segments for subbasin
based distributed hydrologic modeling.
Utah State University, 8200 Old Main Hill
Logan, UT 84322-8200
Phone: (435) 797-3172
Robert T Pack
Utah State University, 4110 Old Main Hill
Logan, Utah 84322-4110
Phone: (435) 797-7049
Fax: (435) 797-1185