Accelerated land loss and nuisance flooding potential in the Barataria Basin: The impacts of land subsidence, sea-level rise, and tidal dynamics

IF 2.1 4区地球科学 Q2 MARINE & FRESHWATER BIOLOGY

Journal of Sea Research Pub Date : 2025-05-21 DOI:10.1016/j.seares.2025.102594

Byungho Kang , Surui Xie

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引用次数: 0

Abstract

The Barataria Basin, an ecologically and economically important microtidal interdistributary basin in Louisiana, is experiencing rapid land subsidence and increased coastal inundation.

This study quantifies the combined effects of land subsidence, sea-level rise (SLR), and evolving tidal dynamics within this vulnerable basin. Our analysis reveals a significantly amplifed tides throughout the region, further exacerbating the impacts of subsidence and SLR.

By 2045, the land area predicted to remain above Mean Higher High Water (MHHW) may decrease to approximately 65 % of the area remaining above Mean Sea Level (MSL), indicating that these low-lying regions will likely experience more frequent high-tide inundation events. This escalating flood risk poses a major threat to the Basin's sustainability, emphasizing the importance of integrating tidal dynamics into the adaptive management plans for restoration projects such as the Mid-Barataria Sediment Diversion (MBSD). The research establishes a benchmark for evaluating the relative contributions of different drivers to coastal change and highlights the growing influence of tidal inundation. These findings offer essential insights to guide management strategies in similarly vulnerable coastal regions worldwide.

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巴拉塔里亚盆地加速土地流失和潜在的滋扰性洪水：地面沉降、海平面上升和潮汐动力学的影响

巴拉塔里亚盆地是路易斯安那州一个生态和经济上重要的微潮分流盆地，正在经历快速的地面沉降和沿海淹没的增加。该研究量化了这一脆弱盆地内地面沉降、海平面上升和不断变化的潮汐动力学的综合影响。我们的分析表明，整个地区的潮汐明显放大，进一步加剧了下沉和SLR的影响。到2045年，预计保持在平均高水位（MHHW）以上的陆地面积可能会减少到平均海平面（MSL）以上面积的65%左右，这表明这些低洼地区可能会经历更频繁的高潮淹没事件。这种不断升级的洪水风险对盆地的可持续性构成了重大威胁，强调了将潮汐动力学纳入恢复项目适应性管理计划的重要性，例如中巴拉塔里亚沉积物转移（MBSD）。该研究为评估不同驱动因素对沿海变化的相对贡献建立了基准，并强调了潮汐淹没日益增长的影响。这些发现为指导全球同样脆弱的沿海地区的管理策略提供了重要的见解。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of Sea Research 地学-海洋学

CiteScore

3.20

自引率

5.00%

发文量

审稿时长

6-12 weeks

期刊介绍： The Journal of Sea Research is an international and multidisciplinary periodical on marine research, with an emphasis on the functioning of marine ecosystems in coastal and shelf seas, including intertidal, estuarine and brackish environments. As several subdisciplines add to this aim, manuscripts are welcome from the fields of marine biology, marine chemistry, marine sedimentology and physical oceanography, provided they add to the understanding of ecosystem processes.