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  Songurchay river basin is one of the Qaranghu river branches with high volume of sediments load. Due to this fact, feed forward back propagation model (FFBP) and radial basis function (RBF) was used in this study to estimate the suspended sediment load. Due to the non-linear nature of the suspended sediment load these using models as nonlinear models is inevitable to simulate these parameters. However, the input parameters for each model vary and in a single phase only discharge data were used and then beside the discharge data rainfall data were also used in each model. Then, to determine the efficiency of models, root mean square error (RMSE) and the error of determination (R2) was used and it was observed that the RBF model in the case of using two parameters, discharge and rainfall as an input parameters, has achieved better results with 0.9251 R² and the root mean square error equivalent to 265 mg in liter. Finally, to assess the RMSE parameter the Akaike Information System (AIC) was used and it was observed that RBF models by having Akaike values equivalent to 1042 was more capabile.

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In this study, to investigate the disturbance drainage basin, 80 sub-basins were determined. The maps of geology, drainage, raster maps, fault basin was prepared. The performance area and perimeter of the basin, number and length of channels, frequency of drain, angle General, Internal angle faulting density, and angle of internal and public were calculated. The number of faults in the fault zone is about 10 to 15. These fault zone rock properties of marl, limestone, flysch, limestone, dolomite and limestone were Cenomanian. Analysis of variance based on lithology and density fault factors showed that there was a significant difference between the studied variables. Results of mean comparison with Duncan test showed that the sub-basins located on fault zones 2 and 3 are most disturbed drainage, respectively. Multivariate analysis results indicated that sub without fault in a category. Sub-basins of 73, 50, 51 and 72, however, the role of the effects of no-fault. But according to studies done on morphometric characteristics of a fault in the sub-groups, respectively. Sub basin of 2, 13, 4, 6, 14, 16, 23, 8, 39, 34, 70, 77, 80, 52, 67, 78, 7, 12 and 79 were the only sub basin that is likely to have undiscovered fault, was high.