ABSTRACT
This chapter describes a new modelling approach for optimizing the operation of such a reservoir system considering the temporal and spatial variation of sediment deposition. It also describes the application of the new model for calibration and verification to Roseires dam on the Blue Nile river in Sudan. Sedimentation poses a serious threat to the sustainability of reservoirs. Different methods are suggested in the literature to study reservoir operation considering sediment management. Reservoir sedimentation is the foremost problem of existing reservoirs in the Eastern Nile Basin. Loss of upstream land due to high soil erosion has resulted in an increase in sediment loads to rivers. Despite the sediment data limitation in the basin, few measurement data and estimates at downstream reservoirs in Sudan are documented in the literature. Sediment deposition cumulatively reduces the reservoir capacity for water storage. The distribution of sediment deposited in the reservoir results in change of Level-Area-Volume relation.
