HR: 16:30h
AN: OS34A-05    [Abstracts]
TI: Hurricane waves on Storm Surges in Coastal Zone
AU: * Wu, C
EM: cs.wu@noaa.gov
AF: Meteorological Development laboratory, NWS, OST22, NOAA 1325 East-West Highway, Silver Spring, MD 20910 United States
AB: During a tropical storm, high winds and low pressure generate abnormal sea water levels and currents. We present a time series of 48 hours water levels combining wave effects on surges during hurricane Opal (1995). The offshore hurricane ocean wave is modeled by a recent parametric ocean wave model using the best track data. The post-storm meteorological input data are applied to the calculation of surges and storm waves. A scheme is used to simulate the effects of wave-surges near the coast: the time varying surges is obtained first and then the modified mean water level is used for coastal wave calculations. The high water levels at the gauge station and on-site debris line are collected for model comparison. The hurricane waves and coastal waves are calculated near the eye center and on the beach slope, where the waves break and produce a mean free surface wave set-up. We examined the maximum wave set-ups at the shoreline, the wave run-up on the beach, adding up the storm surges and predicted tides at the station. It was found that the inland flooding is the combined results of storm surges elevating the water level, causing the wave breaking further landward and a higher wave run-up. The accuracy of hurricane waves is significant to the determination of inundation zone.
UR: http://www.oceanweather.com/8thwave/Papers/O4.pdf
DE: 4546 Nearshore processes
DE: 4560 Surface waves and tides (1255)
DE: 4564 Tsunamis and storm surges
SC: Ocean Sciences [OS]
MN: 2005 Joint Assembly