Storm-Wise Sediment Yield Prediction Using Rainfall and Runoff Variables at Educational and Research Watershed of Tarbiat Modares University

Soil erosion and sediment yield from watersheds restrict sustainable use of land resources. Evaluation of governing process is، therefore، necessary for better understanding of the watershed system leading to appropriate management approaches. On the other hand، different behaviors of soil erosion and sediment yield as well as the necessity of regional studies have been often emphasized. The purpose of this study was to evaluate the applicability of rainfall and runoff variables of 8 storm events occurred during 2008 in prediction of storm-wise sediment yield in Educational and Research Watershed of Tarbiat Modares University (Kojour) with about 500 Km2 in Mazandaran Province. Both bivariate and multivariate regression models were applied with using simple and transformed dependent and independent variables. Results showed that the developed regression models had good capability for estimation of storm-wise sediment yield with coefficient of determination، above 0. 76، estimation error below 69% and efficiency coefficient of greater than 0. 52. These findings may be convincing for the application of the developed models in this investigation to other ereas similar to the studied area and laeaing to suitable soil and water management.