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

BLTM uses Lagrangian calculations that are unconditionally stable and based upon a reference frame that moves at a velocity equal to the mean channel flow velocity. BLTM results are within the accuracy required by most water-quality studies. The BLTM is easily applied to unsteady flows in networks of one-dimensional channels with fixed geometry and tributary inflows. Reaction kinetics for up to 10 constituents are provided in a user-written decay-coefficient subroutine. Postprocessor plot programs improve the utility of the model. The model routes any number of interacting constituents through a system of one-dimensional channels.

          The following programs are included in the BLTM distribution:
        • cbltm - branched Lagrangian transport model
        • qbltm - bltm with qual2e
        • tbltm - bltm with temperature
        • bbltm - builds the input file for BLTM
        • bqual2e - builds the input file for QBLTM
        • mrg - builds a table of data by adding or modifying a column based on data in files old.bc and in, writes file bc
        • ctplt - plots concentration vs time and compute the RMS error
        • cxplt - plots concentration vs distance
        • equltmp - computes the equilibrium temperature from daily extreme temperatures
        • solar - computes the solar radiation from empirical equations

          Available for download on the WWW.
Topics
Channels/Hydrology

Additional Topics/Tags/Keywords
Free Download, Lagrangian, Water Quality, Flow

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: