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The Geospatial Hydrologic Modeling Extension (HEC-GeoHMS)
has been developed as a geospatial hydrology toolkit for engineers
and hydrologists with limited GIS experience. HEC-GeoHMS uses
ArcView and the Spatial Analyst extension to develop a number of
hydrologic modeling inputs for the Hydrologic Engineering Center's
Hydrologic Modeling System, HEC-HMS. ArcView GIS and its Spatial
Analyst extension are available from the Environmental Systems
Research Institute, Inc. (ESRI). Analyzing digital terrain data,
HEC-GeoHMS transforms the drainage paths and watershed boundaries
into a hydrologic data structure that represents the drainage
network. The program allows users to visualize spatial information,
document watershed characteristics, perform spatial analysis, and
delineate subbasins and streams. Working with HEC-GeoHMS through its
interfaces, menus, tools, buttons, and context-sensitive online help
allows the user to expediently create hydrologic inputs for HEC-HMS.
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