Page - 1401 - in Book of Full Papers - Symposium Hydro Engineering

flood events, when the rubber dam was completely deflated, the re-inflation time will be with app. 2 days. Fig. 8 Control and installation scheme for the 4 main sections B+C+D+E Automatic operation aims to keep the head water level constant. This is achieved by adjusting the weir crest height according to changes in river flow. In automatic operation the rubber dam will be operated in dependence of the state of the rubber dam and predefined parameters in the control program. An operation priority will be assigned to each of the main weir sections B to E by the operator. It is possible to assign the same priority to two or more sections for parallel operation. The rubber dam control system for the 4 main weir sections feature a threefold safety system: • First, there is an overflow section on top of control shaft • Second, there is a manually operated outlet valve • Third, the inside pressure in the dam is controlled by an emergency discharge device consisting of a mechanically operating bucket drive for the release valve. This mechanism will be activated if the head water level exceeds a critical elevation. Water released by the safety system will be drained out to the river through the outlet pipe. 1401