HEC-6, Scour and Deposition in Rivers and Reservoirs

The purpose of this one-dimensional sediment transport model is to calculate water surface and sediment bed surface profiles by computing the interaction between sediment material in the streambed and the flowing water-sediment mixture. The total sediment load is computed for each cross section along with the trap efficiencies for clays, silts, and sands. The change in bed elevation, water surface elevation, and thalweg elevation are also computed for each cross section. Dredging can be simulated and reservoir deposition can be analyzed with the model.

       Two editions of the HEC-6 program are distributed in the HEC-6 package: "overlayed" and "extended memory". While the basic programs are the same, the extended memory version runs faster and provides for up to 500 cross sections in a 10 stream segment dendritic network while the overlayed version only allows 150 sections. The overlayed version operates within the DOS 640K limit (570Kb RAM). The extended memory version requires a 386 (or better) computer with 2-4Mb extended memory and a math co-processor.

Notes: Microcomputer Versions (see above paragraphs)

            Support Material: User's Manual

            Date of Last Program Release: October 1993 (Version 4.1)