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Record Search Query:
[Keyword='MODELS']
FourPt - An Unsteady, One-Dimensional, Open-Channel Flow Model
Entry ID:
USGS_FourPt
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Summary
Abstract:
FOURPT is a numerical model for simulating unsteady, one-dimensional flow in networks of open channels. Options particularly useful in training or prototyping include selection of governing equations (kinematic, diffusion, or dynamic), boundary-value perturbation, and user-programmable constraint equations. The model can simulate non- trivial concepts, such as flow in complex interconnected channel networks, meandering channels with variable effective flow lengths, hydraulic structures defined by unique three-parameter relations, and density-driven flow. Channel geometry may be rectangular, trapezoidal, or irregular depending upon which of three channel- property modules is linked with the program.
[Summary provided by the USGS.]
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Use Constraints
System Requirements:
FOURPT is written in Fortran 77 with the following extensions: use of include files, variable names longer than 6 characters, use of mixed case, and unformatted read of internal file. Memory requirements depend on array dimensioning parameters in include files. Generally, the program is easily adapted to most computer systems. The code has been used on UNIX-based computers, Macintosh, and DOS-based 386 or greater computers having a math coprocessor and 4 mb of memory.
WARNING: FOURPT is coded such that local variables are expected to be static (that is, local variables need to retain their values upon exit of a routine). Thus, the appropriate compiler option(s) must be specified to produce reliable results.
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Distribution Media
Distribution_Media:
Online
Fees:
No fees
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Personnel
JANICE
M.
FULFORD
Role:
TECHNICAL CONTACT
Email:
jfulford at usgs.gov
Contact Address:
U.S. Geological Survey
Office of Surface Water
Building 2101, Mail Stop 1515
City:
Stennis Space Center
Province or State:
MS
Postal Code:
39529
Country:
USA
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WATER RESOURCES
U.S. GEOLOGICAL SURVEY
Role:
TECHNICAL CONTACT
Email:
h2osoft at usgs.gov
Contact Address:
U.S.G.S.
Hydrologic Analysis Software Support Program
437 National Center
City:
Reston
Province or State:
VA
Postal Code:
20192
Country:
USA
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TYLER
B.
STEVENS
Role:
SERF AUTHOR
Phone:
(301) 614-6898
Fax:
301-614-5268
Email:
Tyler.B.Stevens at nasa.gov
Contact Address:
NASA Goddard Space Flight Center
Global Change Master Directory
City:
Greenbelt
Province or State:
MD
Postal Code:
20771
Country:
USA
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Publications/References
DeLong, L.L., 1986, Extension of the unsteady one-dimensional open- channel flow equations for flow simulation in meandering channels with flood plains, in Subitzky, S., ed., selected papers in the hydrologic sciences: U.S. Geological Survey Water-Supply Paper 2290, p. 101-105.
DeLong, L.L., 1993, A numerical model for learning concepts of streamflow simulation, in National Conference on Hydrologic Engineering, 1993, Proceedings: American Society of Civil Engineering, p. 1586-1591.
DeLong, L.L., Thompson, D.B., and Fulford, J.M., 1992, Data encapsulation using Fortran-77 modules: Fortran Forum, v. 11, no. 3, p. 11-19. ACM.
Nader, P., 1993, Application of Four Point model to the Sacramento- San Joaquin Delta, in National Conference on Hydrologic Engineering, 1993, Proceedings: American Society of Civil Engineering, p. 442-447.
Thompson, D.B., DeLong, L.L., and Fulford, J.M., 1992, Data encapsulation using Fortran-77 modules - a first step toward object-oriented programming: U.S. Geological Survey Water- Resources Investigations Report 92-4123.
Creation and Review Dates
SERF Creation Date:
2011-12-16
SERF Last Revision Date:
2011-12-16
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