Evaluation and Comparison Different Methods of Preparation of Sediment Rating Curve in Telezang Station of the Dez River

For preparation of sediment rating curve, different methods developed by researchers. But selection of a suitable method is a very complex problem. For this purpose, results of these methods must be compared with observed data. In this research, it made used of observed data in Telezang station of the Dez River. This station locates at upstream of the Dez dam. Several suitable soft wares were applied for determination of sediment rating curve. These soft wares can determine sediment rating curve without simplification of problem. This subject increases accuracy of results to an acceptable limit. The applied methods in this research are empirical methods at logarithm coordinates, mathematical optimization methods at Cartesian coordinates, the artificial neural network method and the genetic algorithm method. The results of genetic algorithm method are more accurate than results of other methods. Also the time of running of genetic algorithm method is suitable for determination of sediment rating curve. This research can guide engineers and designers for selection the best method of determination of sediment rating curve