Abstarct: Routing is a process used to predict the temporal and spatial variations of a flood hydrograph as it moves through a catchment. The effect of storage and flow resistance within a catchment are reflected by changesin hydrograph shape and timing as the flood wave from upstream to downstream. Flood routing procedures may be classified as either hydrological or hydraulics. Hydrological methods use the principle of continuity and a relationship between discharge and temporary storage of excess volume of water during the flood period. Hydraulic methods of routing involved the numerical solutions of the one dimensional saint-venant equations of gradually varied unsteady flow in open channels. In the context of this thesis was to investigate the effect of substrate Permeability in advancing wave flood in dry and flat plains is studied. The first computer program written in Visual Basic McCormack explicit finite difference method, To assess the accuracy of a computer program written by phenomena dam failure in both flat bed without friction and bed slope and dry and the output results with analytical solutions and laboratory and measurement errors answers numerical comparison with analytical solutions and laboratory index RMSE deals out. The results indicate that the numerical model by a dam failure is acceptable accuracy in the modeling process. In order to estimate the influence of the values of four empirical equations of Ingham, Davis Wilson, Mauritius and Muscat was used. Then evaluated using a computer program written in the field of hydrography Hughes wash lane and river characteristics was studied. The results indicate the superiority of Ingham equation empirical equation to estimate the influence of the four mentioned in the estimation of the influence of river Hughes wash. The dam failure phenomena in smooth, frictionless and steep and dry substrates (for a short time) and river Hughes wash (for long periods) bed permeability under different conditions, the effect of permeability on flood wave characteristics were examined. The output results indicate that the increase in permeability was reduced flood wave but the three-parameter flow velocity and flow depth, velocity parameters are more sensitive to other parameters for permeability changes at different times.