Search Results: “” — Page 1
Now showing all 2 search results
Peter Allen, Don Cock, Garry Grant and John Ruffini
The paper examines the performance of the Brisbane River and Pine River real time flood management system for the operation of Somerset Dam, Wivenhoe Dam and North Pine Dam during the 1999 flood event.
The February flood event, which was about 80% of the magnitude of the disastrous 1974 flood event upstream of Wivenhoe Dam, was the first major flood event to be managed by the system and it performed very creditably. The overall flood management system comprises:-
A network of 125 ALERT type rainfall and river height stations throughout the catchment; A data management system to facilitate data collection and data validation;
- Hydrologic models to provide inflows into the dams and major downstream tributaries; Gate operation models to route the inflows through the reservoirs; and
- Hydraulic models of the main river channels downstream of the dams.
The paper describes the system and gives details of the performance of the system during the February event. It details the performance of the dams during the event and how this was optimised to maximise the safety of the dams and minimise impacts on those downstream.Learn more
Jack Rynn, John Pix, Garry Grant and Albert Hill
Ground motions resulting from seismic activity can cause significant damage to existing dams. For this reason, monitoring of seismic activity is an important component of a dam safety management program. Similarly, the long term gathering of data on regional seismic activity provides a sound platform for structural adequacy checks of components of existing dams under seismic loading, as well as for future dam design. In this context, the South East Queensland Water Corporation Ltd (SEQWater) and its predecessors have been monitoring earthquake activity in relation to the Wivenhoe, Somerset and North Pine Dams in South East Queensland since 1977. In 1998, SEQWater upgraded the seismic instrumentation with a digital telemetered seismic surveillance system (DTSSS) six-station network to replace the original analogue seven-station network. This state-of-the-art instrumentation was supplied and installed by Nanometrics Inc., Canada through an international tendering process. This paper presents an overview of the DTSSS, results to date and future planning for an integrated strong ground motion accelerograph network.Learn more