Coastal Inundation Hazard Assessment in Australian Tropical Cyclone Prone Regions

IF 3.1 Q2 WATER RESOURCES

Hydrology Pub Date : 2023-12-01 DOI:10.3390/hydrology10120228

Jane Nguyen, Yuriy Kuleshov

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引用次数: 0

Abstract

One of the hazards associated with tropical cyclones (TCs) is a storm surge, which leads to coastal inundation and often results in loss of life and damage to infrastructure. In this study, we used GIS-based bathtub models and tide-gauge-derived water levels to assess coastal inundation scenarios for the landfall region of TC Debbie. The three scenarios modelled what could have happened if the TC’s maximum storm surge had coincided with the maximum storm tide for that day, month, or TC season, where the water levels were determined through analysis of tide gauge data, using a new method called the variable enhanced Bathtub Model. Additionally, this study analysed the impact of excluding the correction of water levels with the Australian Height Datum. Our study found that between the least and most severe scenarios, with the input water-level difference for the model along the coastline being 0.43 m, the observed inundation depth of the analysed populated region increased from 0.25 m to 1 m. Ultimately, it was found that in the worst-case scenario, the study region could have experienced coastal inundation 0.63 m higher than it did, inundating 72.53 km2 of the coast. The results of this study support the consensus that coastal inundation is highly dependent on the characteristics of the terrain, and that coastal inundation modelling, such as that completed in this study, needs to be performed to better inform decision makers and communities of the potential impacts of TC-induced storm surges.

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澳大利亚热带气旋多发地区沿海淹没危害评估

与热带气旋(tc)相关的危害之一是风暴潮，它会导致沿海地区淹没，并经常造成生命损失和基础设施破坏。在这项研究中，我们使用基于gis的浴缸模型和潮汐计得出的水位来评估TC黛比登陆地区的沿海淹没情景。这三种情景模拟了如果热带风暴的最大风暴潮与该天、该月或热带风暴季节的最大风暴潮同时发生可能发生的情况。在热带风暴季节，水位是通过分析潮汐计数据来确定的，使用了一种称为变量增强浴缸模型的新方法。此外，本研究还分析了排除澳大利亚高度基准面对水位校正的影响。我们的研究发现，在最小和最严重的情景之间，当模型沿海岸线的输入水位差为0.43 m时，所分析的人口居住区的观测淹没深度从0.25 m增加到1 m。最终，研究发现，在最坏的情况下，研究区域可能会经历比实际高0.63 m的海岸淹没，淹没72.53 km2的海岸。本研究的结果支持了海岸淹没高度依赖于地形特征的共识，并且需要进行海岸淹没建模，例如本研究中完成的建模，以便更好地告知决策者和社区tc引起的风暴潮的潜在影响。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Hydrology Earth and Planetary Sciences-Earth-Surface Processes

CiteScore

4.90

自引率

21.90%

发文量

192

审稿时长

6 weeks

期刊介绍： Journal of Hydrology publishes original research papers and comprehensive reviews in all the subfields of the hydrological sciences, including water based management and policy issues that impact on economics and society. These comprise, but are not limited to the physical, chemical, biogeochemical, stochastic and systems aspects of surface and groundwater hydrology, hydrometeorology, hydrogeology and hydrogeophysics. Relevant topics incorporating the insights and methodologies of disciplines such as climatology, water resource systems, ecohydrology, geomorphology, soil science, instrumentation and remote sensing, data and information sciences, civil and environmental engineering are within scope. Social science perspectives on hydrological problems such as resource and ecological economics, sociology, psychology and behavioural science, management and policy analysis are also invited. Multi-and interdisciplinary analyses of hydrological problems are within scope. The science published in the Journal of Hydrology is relevant to catchment scales rather than exclusively to a local scale or site. Studies focused on urban hydrological issues are included.