SUSTAINABLE RESERVOIR SEDIMENTATION CONTROL

摘要

The useful life or remaining capacity of reservoirs can be predicted from their trap efficiencies. The most widely known and used method for predicting trap efficiency are the empirical curves of Brune (1953). Many researchers have since questioned Brune's efficiency curves, which use the capacity to inflow alone to describe the dynamics of sedimentation in reservoirs, and makes no distinction made to the source or type of sediment. This paper presents a new simple and generalised trap efficiency relationship, developed by considering the reservoir sedimentation problem as similar to a mixer tank problem. The paper also describes the work done on a study of a new system for the control of reservoir sedimentation. It presents some results of the physical and mathematical model used to simulate the proposed system consisting of a submerged intake and a weir connected to the main dam by closed conduits as shown in Figure 3. Results from the experimental tests conducted on the physical model were compared to SSIIM; a 3-D mathematical model, which has already shown encouraging, results in modelling reservoir sedimentation. It has been demonstrated in this research that the submerged dam and closed conduits for the mitigation of reservoir sedimentation shows great promise in many cases and merits further research.