NAME
flomod - Finite-element surface-water model for two-dimensional flow
in the horizontal plane
ABSTRACT
FLOMOD is part of a modular set of computer programs (FESWMS-2DH)
that simulates two-dimensional, depth-integrated, surface-water
flows. FESWMS-2DH consists of an input data preparation program
(DINMOD), flow model (FLOMOD), simulation output analysis program
(ANOMOD), and graphics conversion program (HPPLOT). The programs
have been developed to analyze flow at bridge crossings where
complicated hydraulic conditions exist, although they may be applied
to many types of steady or unsteady flow problems. Shallow rivers,
flood plains, estuaries, and coastal seas are examples of surface-
water bodies in which flows may be essentially two-dimensional in
the horizontal plane.
The effects of bed friction and turbulent stresses are considered.
Surface wind stresses and the Coriolis force are optionally
considered. Flow through bridges and culverts can be modeled either
as one-dimensional or two-dimensional flow. Both free-surface and
confined two-dimensional flows through bridge openings may be
simulated. The model is able to simulate flows with highly
irregular topography and geometrical features, such as highway
embankments and islands.
METHOD
FLOMOD may be used to simulate flow through bridge openings, over
highway embankments, and through culverts at highway crossings of
rivers, flood plains, or estuaries. The modeling system may be used
to simulate many other steady and unsteady flow situations in which
the flow variables are approximately uniform in the vertical
direction.
HISTORY
Version 1.10.DG1 05/29/92 - Converted to run on Data General AViiON.
Version 1.10 02/24/89 - FHWA official version, general code cleanup.
Version 1.01 06/03/88 - Bug fixes.
Version 1.00 01/01/88 - Initial version developed for the Federal
Highway Administration, Offices of Research, Development, and
Technology, by the U.S. Geological Survey.
DATA REQUIREMENTS
Data requirements include ground-surface elevations or water-body
bathymetry, bridge and culvert dimensions, channel and overbank
surface roughness, current velocity or flow rates, wind velocity,
water temperature, and latitude.
OUTPUT OPTIONS
FLOMOD simulation results can be presented in the form of tabular
reports and graphically in an X-window and HPGL format.
SYSTEM REQUIREMENTS
FLOMOD is written in Fortran 77 with the following extensions: use
of variable names longer than 6 characters, mixed character and non-
character variables in common blocks, use of explicit length
declarations (INTEGER*2, INTEGER*4, REAL*4), include files, and
reference to compiler-dependent system date and time routines.
Generally, the program is easily installed on most computer systems.
The code has been used on UNIX-based computers.
DOCUMENTATION
Froehlich, D.C., 1989, HW031.D - Finite Element Surface-Water
Modeling System: Two-Dimensional Flow in a Horizontal
Plane--Users Manual: Federal Highway Administration Report FHWA-
RD-88-177, 285 p.
REFERENCES
Lee, J.K., and Froehlich, D.C., 1989, HW031.X, research report:
Federal Highway Administrative Report.
Lee, J.K., Froehlich, D.C., Gilbert, J.J., and Wiche, G.J., 1983, A
two-dimensional finite-element model study of backwater and flow
distribution at the I-10 crossing of the Pearl River near
Slidell, Louisiana: U.S. Geological Survey Water-Resources
Investigations Report 82-4119, 66 p.
Wiche, G.J., Gilbert, J.J., Froehlich, D.C., and Lee, J.K., 1988,
Analysis of alternative modifications for reducing backwater at
the Interstate Highway 10 crossing of the Pearl River near
Slidell, Louisiana: U.S. Geological Survey Water-Supply Paper
2267, 54 p.
CONTACTS
Operation:
U.S. Geological Survey
Office of Surface Water
Janice M. Fulford
Building 2101
Stennis Space Center, MS 39529
jfulford@usgs.gov
Distribution:
U.S. Geological Survey
Hydrologic Analysis Software Support Program
437 National Center
Reston, VA 20192
h2osoft@usgs.gov
Official versions of U.S. Geological Survey water-resources analysis
software are available for electronic retrieval via the World Wide
Web (WWW) at:
http://water.usgs.gov/software/
and via anonymous File Transfer Protocol (FTP) from:
water.usgs.gov (path: /pub/software).
The WWW page and anonymous FTP directory from which the FESWMS
software can be retrieved are, respectively:
http://water.usgs.gov/software/feswms.html
--and--
/pub/software/surface_water/feswms
The program and documentation are also available with limited
support for a nominal fee from:
The Center for Microcomputers in Transportation (McTrans)
University of Florida
512 Weil Hall
Gainesville, FL 32611
(352) 392-0378
SEE ALSO
anomod(1) - FESWMS-2DH utility program to analyze simulation
output
dinmod(1) - FESWMS-2DH utility program to prepare data input
hpplot(1) - FESWMS-2DH utility program to plot HPGL graphics
file in an X window