Abstract
A soft ware package based on the Lotus 1-2-3 is developed to solve the Gradually Varied Flow (G.V.F.) problem using the direct step method. The information needed (e.g. normal depth, critical depth and G.V.F. depths) is determined first. Flow profile classification is subsequently checked to identify the type of profile. Finally, the profile length is computed and tabulated. In addition, the Lotus printgraph capabilities are used to provide a graphical representation of the G.V.F. profile, the bed slope and the normal and critical depths. The PC adaptation of the direct step method is documented. A schematic diagram of the direct step method, the spread sheet layouts and Listings of the Lotus MACROS used to facilitate the calculations are presented.
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