SGER: Impact of Hurricane Georges and Recovery Along NE Gulf Coast

SGER：飓风乔治的影响和墨西哥湾东北部沿岸的恢复

• 批准号: 9903984
• 负责人: Gregory Stone
• 金额: $ 4.98万
• 依托单位: Louisiana State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1999
• 资助国家: 美国
• 起止时间: 1999-03-01 至 2001-02-28
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9903984&HistoricalAwards=false
• 关键词: SGER; Impact; Hurricane; Georges; Recovery

9903984StoneThe recent landfall of Hurricane Georges along the Mississippi coast has afforded us a unique opportunity to address an as yet unanswered question: "How does the post-storm response of a typically sediment rich, regressive/progradational system compare with that of a sediment starved, typically transgressive barrier system?" The post-storm adjustment of sediment rich, retrogressive systems has not been investigated in any detail. However, our preliminary investigations indicate that the longer term evolution of fluvially dominated systems in a coastal environment, such as the modern Mississippi River delta plain, are likely significantly influenced by catastrophic events such as Hurricane Georges---particularly on their seaward margins where subdelta growth is occurring and distributaries are prograding. While the response to the storm is evident and will be documented in more detail in this study, the post-storm adjustment phase is not at all understood. In addition, our understanding of the initial phases of barrier island recovery after severe storms is based primarily on supposition, largely governed by our interpretation of the day-to-day dynamics of coastal systems and associated processes during fairweather and storms of lesser magnitude. Our primary objective is to quantify and better comprehend the post-storm adjustment of two geomorphologically distinct environments: an actively building, fluvially dominated, sediment rich environment located in the Birdsfoot delta, Louisiana and a sediment starved, transgressive system comprised of Chandeleur Island (Louisiana), West Ship Island (Mississippi) and Santa Rosa Island (Florida) by establishing key monitoring sites that can be reoccupied over time.

9903984列出了密西西比海岸飓风乔治的最近登陆，这为我们提供了一个独特的机会，可以解决一个尚未解决的问题：“与典型的沉积物，回归/前期/前期的沉积物的后反应与与沉积物饥饿相比，典型的沉积物的后反应如何通常是侵犯屏障系统吗？” 尚未详细研究富含沉积物，倒流系统的富后系统的变化后调节。 但是，我们的初步研究表明，沿海环境中河流支配系统的长期演变，例如现代密西西比河三角洲平原，可能会受到灾难性事件的影响，例如乔治飓风（Harricophic Georges） - 尤其是在Subdelta的海洋缘上的飓风生长正在发生，并且分布正在前进。虽然对风暴的反应是显而易见的，并且将在本研究中更详细地记录，但在烟气后调整阶段根本不了解。 此外，我们对严重暴风雨后障碍岛恢复的初始阶段的理解主要基于假设，这在很大程度上是由我们对费尔威瑟（Fairweather）和较小幅度的风暴期间沿海系统和相关过程的日常动态的解释所支配的。 我们的主要目的是量化和更好地理解两个地质学上不同环境的消息后调整：一个积极建筑，河流支配，富含沉积物的环境，位于鸟脚三角洲，路易斯安那州，路易斯安那州和一个饥饿的泥沙，由Chandeleur Island（路易斯安那州）组成），通过建立可以随着时间的推移可以重新占据的关键监测站点，西海岛（密西西比州）和圣罗莎岛（佛罗里达州）（佛罗里达州）。