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斯通最近，飓风乔治沿着密西西比海岸登陆，为我们提供了一个独特的机会来解决一个尚未回答的问题：“一个典型的沉积物丰富，海退/海侵系统的风暴后响应如何与沉积物匮乏，典型的海侵屏障系统相比？“风暴后对沉积物丰富的倒退系统的调整还没有进行任何详细的调查。 然而，我们的初步调查表明，在沿海环境中，如现代密西西比河三角洲平原，河流为主的系统的长期演变，可能会受到重大影响的灾难性事件，如飓风乔治-特别是在他们的向海边缘，亚三角洲的增长正在发生和分流。虽然对风暴的反应是明显的，并将在本研究中更详细地记录，风暴后的调整阶段是完全不理解的。 此外，我们对严重风暴后屏障岛恢复的初始阶段的理解主要是基于假设，主要取决于我们对沿海系统的日常动态和较小规模风暴期间的相关过程的解释。 我们的主要目标是量化和更好地理解两种地貌不同环境的风暴后调整：一个活跃的建设，河流为主，沉积物丰富的环境，位于鸟脚三角洲，路易斯安那州和沉积物匮乏，海侵系统组成的钱德尔勒尔岛（路易斯安那州）、西希普岛（密西西比州）和圣罗莎岛（佛罗里达州）建立关键监测点，随着时间的推移可以重新占用。