Adaptable Evaluation of Wave Overtopping Discharges on Composite Seawalls at Linbian Coast with EurOtop Formulae

• Main Authors: WU, HUI-LIEH, 吳輝烈
• Other Authors: Shiaw-Yih Tzang
• Format: Others
• Language: zh-TW
• Published: 2013
• Online Access: http://ndltd.ncl.edu.tw/handle/12197149001944551293

碩士 === 國立臺灣海洋大學 === 河海工程學系 === 101 === Abstract In this study wave conditions by Typhoon Marokot were first applied in wave flume experiments on the composite seawalls in Libian to discuss potential contributions of the overtopping discharges to the resulting flooding. Two water levels were also adopted to evaluate the applicability of formulae by local Water Resources Agency and EurOtop at highest storm surge level +1.15 m, no overtopping events were found, and testing results of the Water Resources Agency was undetrestimated. Besides, the use of EurOtop formula has given little overtopping waves to not influence vehicles, pedestrians and safety of the seawall. Based on above facts, Linbian area most likely did not occur overtopping during Typhoon Morakot . When the storm surge level is +1.65 m, the test did not occur overtopping, and compared with experimental values the results of the EurOtop and the Water Resources Agency were found to be underestimated. As storm surge water level is +2.14 m, the calculated values of Water Resources Agency were smaller than experimental values by 1.27 ~ 2.4 times, and the EurOtop formula by 17.5 to 27.4 times. If the EurOtop formula changes toe depth of 1.3 ~ 1.4m ,the differences are reduced to 3.98 ~ 6.71 times. Finally, the resulting experimental measurements are found to be well dependent on h/L0, H/h and Ursell number which linear relationship, the Water Resources Agency formulas are well dependent on H/h and Ursell number which linear relationship , the EurOtop formulas are well dependent on h/L0, Ursell number which a good linear relationship . Keywords: Overtopping, Composite Seawalls, Linbian,EurOtop Formulae, Water Resources Agency Formulae