Water Resources Applications Software

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Summary of FLOMOD

       flomod - Finite-element surface-water model for two-dimensional flow
                in the horizontal plane

       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.

       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

       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 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.

       FLOMOD simulation results can be presented in the form of tabular
       reports and graphically in an X-window and HPGL format.
       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.

       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.

       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.

          U.S. Geological Survey
          Office of Surface Water
          Janice M. Fulford
          Building 2101
          Stennis Space Center, MS 39529

          U.S. Geological Survey
          Hydrologic Analysis Software Support Program
          437 National Center
          Reston, VA 20192

       Official versions of U.S. Geological Survey water-resources analysis
       software are available for electronic retrieval via the World Wide
       Web (WWW) at:

       and via anonymous File Transfer Protocol (FTP) from:

         (path: /pub/software).

       The WWW page and anonymous FTP directory from which the FESWMS
       software can be retrieved are, respectively:


       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

       anomod(1) - FESWMS-2DH utility program to analyze simulation
       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

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