A numerical study of the impact of hurricane-induced storm surge on the Herbert Hoover Dike at Lake Okeechobee, Florida

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• 作者：Yuepeng Li ; Yi-Cheng Teng ; David M. Kelly ; Keqi Zhang
• 关键词：Storm surge ; Lake Okeechobee ; Dike failure ; Hurricane Frances ; Hurricane Jeanne ; Hurricane Wilma ; Quad ; tree ; Adaptive mesh refinement
• 刊名：Ocean Dynamics
• 出版年：2016
• 出版时间：December 2016
• 年：2016
• 卷：66
• 期：12
• 页码：1699-1714
• 全文大小：6,981 KB
• 刊物类别：Earth and Environmental Science
• 刊物主题：Earth sciences
  Oceanography
  Geophysics and Geodesy
  Meteorology and Climatology
  Fluids
  Structural Foundations and Hydraulic Engineering
  
• 出版者：Springer Berlin / Heidelberg
• ISSN：1616-7228
• 卷排序：66

文摘

Hurricanes Frances, Jeanne, and Wilma passed over Lake Okeechobee, Florida, in September 2004 and October 2005, respectively. Strong winds caused a large surface seiche on the lake during all three storms. These storms resulted in erosion damage to the Herbert Hoover Dike (HHD) on Lake Okeechobee. In this paper, we use the Fully Adaptive Storm Tide (FAST) model (Kelly et al. in Coast Eng J 57(4):1–30, 2015, Nat Hazards 83:53–74, 2016) to study the response of the lake (in terms of the water level fluctuations and induced currents) to hurricanes Frances, Jeanne, and Wilma. Comparisons of the modeled surface water level with the observations are in overall good agreement for all three hurricanes. The modeled results suggest that the strong currents induced by the storm winds may be the dominant factor controlling the dike erosion observed at the lake side. The locations of erosion damage to the dike are consistent with the modeled high velocity zones during these three storms. In addition, numerical experiments have been conducted with eight hypothetical category 5 hurricanes approaching from different directions to investigate the erosion-prone zones related to high velocities in the vicinity of the dike. The results of the study should help to provide insight into vulnerable reaches of the HHD and inform flood control in the Okeechobee region.