Abstract
The primary focus of this research is to study the oscillations of semi-enclosed water body induced by hurricanes. The physical mechanisms of the wind-induced oscillation (storm surge) in a semi-enclosed water body are analyzed by the depth-averaged, non-linear shallow-water equations. The numerical model using the finite-volume method (FVM) to solve the depth-averaged, non-linear shallow-water equations is developed and the present model is verified by the intensive field data reported by IPET. The present model is further applied to the investigation of the oscillations (storm surges) in Lake Pontchartrain induced by the winds generated by four synthetic hurricanes within the time-span of 00:00 UTC August 29 to 00:00 UTC August 30, 2005: 1.Hurricane Katrina tracking on its original route, 2.Hurricane Katrina tracking 36 km west of its original route, 3.Hurricane Katrina tracking 72 km west of its original route, and 4.Hurricane Katrina tracking on its original route with reduced forward speeds. The major application of the present model is to assist the design of the water-front structure surrounding the semi-enclosed water body that has been influenced by the oscillations induced by hurricanes. The numerical simulations generated by the present model can help the planners to determine a better strategy of the hurricane protection systems surrounding the communities of the semi-enclosed water body.
Highlights
The hurricane-induced oscillation of bays, harbors, and lakes can have a direct effect on shipping and design of flood protection system for beach and coastal communities
The major objective of this research has been to study the oscillations of the semi-enclosed water body induced by hurricanes
The present model is used to investigate the oscillations in Lake Pontchartrain induced by wind generated by the four (4) synthetic hurricanes, including Hurricane Katrina, between 00:00 UTC August 29, 2005 and 00:00 UTC August 30, 2005
Summary
The hurricane-induced oscillation (storm surge) of bays, harbors, and lakes can have a direct effect on shipping and design of flood protection system for beach and coastal communities. Inundation in both estuarine tidal flats and riverine flood planes due to the storm surge causes casualties and property damages and affects the deposition and erosion of sediments in the coastal areas. Hurricane Katrina was formed over the Bahamas on August 23, 2005, and crossed southern Florida as a moderate Category 1 hurricane.
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