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General Listing
Title of Listing:
CGAP
Category:
Software/Models
Subcategory:
Government, All Listings
Date:
Document #:
Web Site:
http://water.usgs.gov/software/cgap.html
Email:
h2osoft@usgs.gov
Abstract:

CGAP permits the analysis, interpretation, and quantification of the physical properties of an open-channel reach as defined by a sequence of cross sections. The primary function of the program is to compute the area, width, wetted perimeter, and hydraulic radius of cross sections at successive increments of water-surface elevation (stage) from data that consist of coordinate pairs of cross-channel distances and land-surface or channel-bottom elevations. Longitudinal rates-of-change of cross-sectional properties are also computed. In addition, the mean properties (including discharge as computed using the Manning's equation) of a channel reach and the cross-sectional area and channel widths as functions of stage for subdivisions of a cross section can be computed. CGAP was developed to compute, display, and otherwise format cross-sectional data for use with simulation models. CGAP produces files of data in the required input format for BRANCH and HSPF (the latter after use of the program genftbl--generate F- Table--provided with CGAP). CGAP has 17 output options that produce the following forms of output: tabular lists, sequential files, and (or) graphical plots in digital or line-printer format.

          Available for download on the WWW.
Topics
Channels/Hydrology

Additional Topics/Tags/Keywords
Free Download, Open Channel Flow, Channel Reach

Organization:
US Geological Survey (USGS), Hydrologic Analysis Software Support Team
Address:
437 National Center
Phone:
DescriptionNumber
City:
Reston
1.
State/Province/Territory:
VA
2.
Zip/Postal Code:
20192
3.
Country:
United States
4.
Fax:
Branch Locations: