• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Geo-marine letters >Detecting the effects of rapid tectonically induced subsidence on Mayotte Island since 2018 on beach and reef morphology, and implications for coastal vulnerability to marine flooding
【24h】

Detecting the effects of rapid tectonically induced subsidence on Mayotte Island since 2018 on beach and reef morphology, and implications for coastal vulnerability to marine flooding

机译：Detecting the effects of rapid tectonically induced subsidence on Mayotte Island since 2018 on beach and reef morphology, and implications for coastal vulnerability to marine flooding

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相关主题

摘要

Subsidence is a widespread phenomenon on the world's coasts. Mayotte, a coral reef-fringed archipelago in the SW Indian Ocean, experienced, in 2018 and 2019, 32 earthquakes with a recorded magnitude > 5 sourced by magmatic extraction from a deep reservoir 40-60 km east of the archipelago. This crisis resulted in island subsidence of up to 0.2 m. Profile measurements of three beaches in 2019-2021, referenced to benchmarks adjusted for subsidence, did not show any notable morphological change when compared to earlier profiles obtained in 2006/2008. This suggests that the rapid but limited subsidence has not significantly affected these systems, excluding eventual ecological repercussions that are not investigated here. Profile changes reflect seasonal variations in monsoon and trade-wind wave energy, and additionally the effect of local mild terrigenous sediment inputs. The sea-level rise caused by subsidence is, however, leading to more frequent spring high-tide flooding of some low back-beach areas and roads on the densely populated northeastern shores of the archipelago, the zone most affected by this tectonic movement. The case of Mayotte is interesting inasmuch as the subsidence caused by a distant submarine volcanic event has not been abrupt as in tectonically active areas nor continuous as in subsidence related, for instance, to glacio-isostatic readjustment, to continuous natural sediment compaction, or to anthropogenic loading. The crisis has been relatively quiescent since July 2021. Continuous monitoring will be needed to see how subsidence will eventually further affect the beach-reef flat systems of Mayotte.

著录项

获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号