Mangrove forests can be an effective coastal defence in the Pearl River Delta, China
Mangrove forests can be an effective coastal defence in the Pearl River Delta, China
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红树林可以成为中国珠江三角洲有效的海防
DOI：
10.1038/s43247-022-00672-7
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发表时间：
2023
影响因子：
7.9
通讯作者：
De Dominicis M
中科院分区：
文献类型：
--
作者：
De Dominicis M
海岸植被可以降低风暴期间的极端水位，但复杂河口或三角洲系统的控制因素和过程仍然不清楚。这限制了在低洼沿海地区的三角洲特大城市有效实施基于自然的海岸防御。在这里，我们对红树林如何在强台风期间为位于珠江三角洲（中国）的大型沿海城市（如广州和深圳）提供海岸保护进行了数值模拟，如Hato（2017）。在极端水位条件下，红树林对水位的衰减是有效的，红树林性质的差异驱动了其海岸防护功能。局部（湿地内）极端水位的衰减更有效的广泛的植被斑块和更高的植被阻力。狭窄的植被斑块仍然可以提供非本地（上游）的水位衰减，如果位于上游河口通道，但他们的设计需要避免放大水位在其他三角洲地区。
Coastal vegetation can reduce extreme water levels during storm events, but the controlling factors and processes in complex estuary or delta systems are still unclear. This limits an effective implementation of nature-based coastal defences in delta mega-cities in low-lying coastal areas. Here we have numerically modelled how mangroves can offer coastal protection to the large coastal cities located in the Pearl River Delta (China), such as Guangzhou and Shenzhen, during strong typhoons, like Hato (2017). Water level attenuation by mangroves is effective during extreme water level conditions and differences in mangrove forests’ properties drive their coastal protection function. The local (within-wetland) attenuation of extreme water levels is more effective with wide vegetation patches and higher vegetation drag. Narrower vegetation patches can still provide non-local (upstream) water level attenuation if located in the upper estuary channels, but their design needs to avoid amplification of water levels in other delta areas.
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