Determine the best relationship between water and sediment discharge in the rivers of Sierra and Bylqan Karaj

Estimates and forecasts sediment load of a river system in different sciences (geology, hydrology, etc.) pursue different objectives. For many reasons, including changes in fish habitat, changes in sediment load due to human impacts, assessment of the Delta and the mouth of the river and coastal environment as well as estimates and forecast sediment load is essential .In this study, simultaneous data rate of suspended sediment and water flow rate for 44 years (2000- 1967) for hydrometric stations in the city of Karaj was Bylqan and Sierra .In order to estimate in terms of tons of sediment per day for each season, the four USBR, medium categories, USBR-FAO and FAO in the medium category. What Bylqan station and Sierra were used. Measuring and estimating bed load is usually very complex, so due to lack of data 15% of suspended sediment as bed load was considered. Methods for evaluating the accuracy of statistics such as the coefficient of determination, R2, the mean absolute error (MAE) and root mean square error (RMSE) was use . The results show a weak but significant relationship between flow rate and floating rate in different seasons. It seems that the complexity of sediment transport processes in the field of other factors such as precipitation intensity, precipitation type and is very affected. It seems that other factors such as the intensity of rainfall, type of correlation between rainfall and runoff data greatly reduced .There is also the Amir Kabir Damon eating natural relations governing the process of sediment transport in coastal stations is blocked

کلیدواژه ها:

sediment rating curve ، USBR ، medium categories ، FAO