Water Resources Applications Software

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Summary of MODEIN

       modein - Computation of total sediment discharge by the modified
                Einstein procedure

       MODEIN computes total sediment discharge at a cross section of an
       alluvial stream having primarily a sand bed from measured hydraulic
       variables, the concentration and particle-size distribution of the
       measured suspended sediment, and the particle-size distribution of
       the bed material.

       The computation involves the extrapolation of the measured
       suspended-sediment discharge to represent the total suspended-
       sediment discharge and the addition of a computed bedload discharge.
       The procedure is applicable only if measured data are available so
       it cannot be used directly for design or predictive purposes.  It is
       intended to be used only at sites where all of the bed material is
       finer than about 16 millimeters, and it can be used only if a
       significant part of the measured suspended sediment is composed of
       particles of the same size as particles in the bed material.

       Version 1.4 1998/01/16 - First release of original program as ported
          and after code clean-up for use on UNIX workstations.

       Input for MODEIN is generated during an interactive session using
       the program MEPDATA.  MEPDATA generates a direct access file that is
       read by MODEIN.  The following data are prompted for by MEPDATA to
       form the MODEIN data set:
               measurement location
               date of measurement
               time of measurement
               water discharge
               top width of cross section
               mean depth in cross section
               water temperature
               minimum percentage of both suspended sediment and bed
               particle size at which 35 and 65 percent of the bed material
                  by weight is finer
               concentration of measured suspended sediment
               average depth at the sampling verticals
               distance between the bottom of the sampled zone and
               Z values
               percent by weight of measured suspended sediment
               percent by weight of bed material

       MODEIN is written in Fortran 77.  Generally, the program is easily
       installed on most computer systems.  The code has been used on UNIX-
       based computers and DOS-based 386 or greater computers having a math
       coprocessor and 1 mb of memory.

       Stevens, H.H., 1985, Computer program for the computation of total
          sediment discharge by the modified Einstein procedure: U.S.
          Geological Survey Water-Resources Investigations Report 85-4047,
          77 p.

       Folk, R.L., 1968, Petrology of Sedimentary Rocks:  Austin, Hemphill
          Publishing Co., p. 44-50.

       Inman, D.L., 1952, Measures for describing the size distribution of
          sediments:  Journal of Sedimentary Petrology, v. 22, no. 3, p.

       Krumbein, W.C., 1936, Application of logarithmic moments to size
          frequency distribution of sediments:  Journal of Sedimentary
          Petrology, v. 6, no. 1, p. 35-47.

       Trask, P.D., 1932, Origin and environment of source sediments of
          petroleum: Houston, Gulf Publishing Co., 323 p.

       Operation and Distribution:
          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 MODEIN
       software can be retrieved are, respectively:


       mepdata(1) - Data entry program for modein
       sedsize(1) - Particle-size statistics of fluvial sediments
       sizedata(1) - Data entry program for sedsize

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