Geomorphologic Recovery of North Captiva Island from the Landfall of Hurricane Charley in 2004
Geomorphologic Recovery of North Captiva Island from the Landfall of Hurricane Charley in 2004
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2004 年查理飓风登陆后北卡普蒂瓦岛的地貌恢复情况
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发表时间：
2021
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影响因子：
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通讯作者：
F. Jose
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作者：
Emma Wilson Kelly;F. Jose
2004 年 8 月 13 日，飓风查理作为 4 级飓风在佛罗里达州墨西哥湾沿岸登陆，给北卡普蒂瓦岛带来了毁灭性的打击。飓风导致该岛南端出现裂口，三年后自然愈合。到2008年，该切口地貌已完全修复。激光雷达数据分析显示，该岛的北半部在1998年至2018年期间遭受持续侵蚀，而南半部自2004年以来经历了增生，包括“查理切口”的完全闭合。 2004-2018年岛北段（R71-R73）最大泥沙侵蚀量为-85,710.1 m3，是南部沉积物的来源。 2004 年至 2018 年期间，该岛的破损区域 (R78b–R79a) 获得了 500,163.9 立方米的沉积物，以修复飓风查理造成的切口。连同 LiDAR 数据分析、Google Earth Pro 历史图像和 SANDS 体积分析，证实了沉积物从该岛北端到南端的沿岸运输。冬季风暴是造成这种南向沿岸运输的主要原因，并且被认为是推动海岸动态的主要因素，从而恢复了决口并有助于拓宽北卡普蒂瓦岛的南端。
Hurricane Charley made landfall on the Gulf Coast of Florida on 13 August 2004 as a category 4 hurricane, devastating North Captiva Island. The hurricane caused a breach to occur to the southern end of the island, which naturally healed itself over the course of three years. By 2008, the cut was completely repaired geomorphologically. LiDAR data analysis shows the northern half of the island has been subjected to persistent erosion from 1998–2018, while the southern half experienced accretion since 2004, including the complete closure of the “Charley cut”. The maximum volume of sediment erosion in the northern sector of the island (R71–R73) from 2004–2018 was −85,710.1 m3, which was the source of southern accretion. The breached area of the island (R78b–R79a) obtained 500,163.9 m3 of sediments from 2004–2018 to heal the cut made by Hurricane Charley. Along with LiDAR data analysis, Google Earth Pro historical imageries and SANDS volumetric analysis confirmed the longshore transport of sediments from the northern to the southern end of the island. Winter storms are mainly responsible for this southerly longshore transport and are hypothesized to be the main factor driving the coastal dynamics that restored the breach and helps in widening the southern end of North Captiva Island.