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The influence of climate change on tsunami-like solitary wave inundation over fringing reefs
Journal of Integrative Environmental Sciences ( IF 2.4 ) Pub Date : 2019-05-07 , DOI: 10.1080/1943815x.2019.1614071
Keqi Shao 1 , Weijie Liu 1, 2 , Yangyang Gao 1 , Yue Ning 1
Affiliation  

The protective capability of fringing reefs against tsunami hazards has been reported in numerous post-disaster surveys. It is believed that global warming is changing the water level over the reef flat and reef surface roughness by sea-level rise and coral bleaching. For a better understanding of the influence of climate change on tsunami hazards over fringing reefs, this study utilized a shock-capturing Boussinesq wave model, FUNWAVE-TVD, to simulate the tsunami-like solitary wave propagation and run-up over fringing reefs. Calibrated and validated by the newly obtained experimental data, the present model with shock-capturing scheme, in which only the ratio of wave height to water depth is used to trigger wave breaking, shows reasonable prediction of solitary wave transformation and run-up height over sharply varying reef bathymetry. Numerical experiments were then carried out to investigate the effects of sea-level rise and degrading of the reef surface roughness on the solitary wave inundation distance and fluid force distribution in the inundation zone. Numerical results clearly demonstrate how tsunami hazards change within the inundation zone in response to higher water levels and lower reef roughness and suggest climate change, especially sea-level rise, will significantly increase tsunami hazards in the low-lying areas of the reef-lined coasts. Presented results are discussed for the effects of sea-level rise and coral bleaching on the solitary wave process and implications to further improve the resilience under the threat of climate change.



中文翻译:

气候变化对边缘珊瑚礁海啸状孤波淹没的影响

许多灾后调查都报告了礁石对海啸危害的保护能力。人们认为,全球变暖正在通过海平面上升和珊瑚白化改变礁滩上的水位和礁石表面粗糙度。为了更好地了解气候变化对边缘珊瑚礁海啸危害的影响,本研究利用捕获冲击的Boussinesq波模型FUNWAVE-TVD模拟了类似海啸的孤波传播和边缘珊瑚礁的上升。通过新获得的实验数据进行校准和验证,该模型采用了冲击捕获方案,其中仅使用波高与水深之比来触发破波,显示了合理的孤立波变换和上升高度的预测。急剧变化的礁石测深法。然后进行了数值实验,研究了海平面上升和礁石表面粗糙度降低对淹没区孤立波淹没距离和流体力分布的影响。数值结果清楚地表明,淹水区内的海啸危害如何响应较高的水位和较低的礁石粗糙度而变化,并表明气候变化,尤其是海平面上升,将显着增加礁石衬砌海岸低洼地区的海啸危害。讨论了目前的结果,探讨了海平面上升和珊瑚褪色对孤波过程的影响,以及在气候变化威胁下进一步提高复原力的意义。

更新日期:2019-05-07
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