ABSTRACT
ABSTRACT: The integral model of reservoir sedimentation presented herein allows for a continuous progression from a stagnation condition behind the dam to an overflow condition when the water interface in muddy pond rises above the spillway crest. This is a serious computational challenge, which can only be overcome by a high-resolution, non-oscillatory numerical scheme, such as the one employed here. The hydrodynamic response of the reservoir to single-flood events is considered first to demonstrate that the model predicts, for the first time, all stages of the turbidity current propagation and interaction with a dam. Next, the morphodynamic response of the reservoir to a series of intermittent floods is analyzed to capture the co-evolution of the river delta and reservoir bed. The model was found to successfully a) quantify the impact of single-flood events such as e.g. flush floods associated with global worming, and b) predict the cumulative loss of storage capacity.
