原文传递
HERVEY BAY STORM TIDE STUDY
| 题名： | HERVEY BAY STORM TIDE STUDY |
| 作者： | Neil Collins; Doug Treloar |
| 关键词： | BAY STORM TIDE |
| 摘要： | Large areas in Hervey Bay, Queensland, Australia, are low lying and prone to inundation from local flooding and storm tides. This region is a popular recreational boating destination. A high proportion of the population lives in areas where evacuation from a storm tide would be extremely difficult. Previous evacuation plans are based on crude land contour information and approximate surge levels. The aim of the project has been to produce sophisticated models of storm tide inundation and high resolution mapping of the predicted storm tide risk areas, for both existing populated areas and areas likely to be developed in the future. The study has been conducted in three major components. They were:- ?Offshore detailed three-dimensional modelling of cyclones, coupled with Monte Carlo simulation, to generate storm-tide levels near the shoreline. ?Detailed fine scale two-dimensional dynamic modelling of storm tide from nearshore to onshore. ?GIS mapping of inundation extents, maximum depths, hazard and drainage times. The study has considered a range of events, up to extreme events with detailed mapping produced for 100, 200, 500, 1000 and 10,000 year average recurrence intervals. The analysis takes account of variations in surge and tide around the coast of Hervey Bay, as well as wave setup. In addition, variations in inundation over the coastal plain, both in terms of water levels and drainage were addressed. The study considered storm tides for the existing situation, as well as for those that are predicted to occur in the future due to Greenhouse sea level rise and cyclone central pressure reduction. A 300mm rise in mean sea level and an average central pressure reduction of 5 hPa over the next 50 years were adopted. By use of fine scale nearshore-onshore inundation modelling, with inclusion of trunk pipe systems, a highly accurate definition of peak inundation surfaces over land has been prepared. This modelling indicates up to 300mm difference in flood level across the coastal plain under the same storm tide event, due to the effect of restrictions on flow (such as houses) roadways and drainage paths. Fine scale nearshore-onshore inundation modelling has also been used to derive hazard maps, which are important for emergency planning and, in particular, evacuation planning. |
| 总页数： | Proceedings of the 30th PIANC-AIPCN Congress. Sydney Australia. 22-26 Sept. 2002. pp14 |
| 报告类型： | 科技报告 |
相关文献
- The Importance of Three Dimensional Modelling In Enclosed Coastal Waters as Demonstrated by Circulation Patterns In Manila Bay, Philippines
- Minimum Safe Underkeel Clearance in Port Entrance Channels
- Exploratory Study of Modeling Enroute Pilot Convective Storm Flight Deviation Behavior.
- Vulnerability of Population and Transportation Infrastructure at the East Bank of Delaware Bay Due to Coastal Flooding in Sea-Level Rise Conditions.
- National Transportation Safety Board Marine Accident Report: Grounding of the Small Passenger Vessel, 'Finest', Sandy Hook, New Jersey, on January 4, 2001
- Case study of a low-reflectivity pulsating microburst: Numerical simulation of the Denver, 8 July 1989, storm
检索历史
应用推荐
