An Earthen Sill as a Measure to Mitigate Salt Intrusion in Estuaries

IF 2.3 3区 环境科学与生态学 Q3 ENVIRONMENTAL SCIENCES Estuaries and Coasts Pub Date : 2024-05-28 DOI:10.1007/s12237-024-01359-2
Gijs G. Hendrickx, Laura A. Manuel, Stuart G. Pearson, Stefan G. J. Aarninkhof, Ehab A. Meselhe
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Abstract

At a global scale, deltas are vital economic hubs, in part due to the combination of their access to inland regions via river systems with their proximity to sea. However, with the sea in close vicinity also comes the threat of freshwater contamination by saline seawater, especially during droughts. This study explores the potential of a mitigation measure to estuarine salt intrusion, namely the construction of a (temporary) earthen sill—a measure implemented in the Lower Mississippi River near New Orleans (LA, USA). This study suggests design guidelines on how a sill can be used to mitigate estuarine salt intrusion: the design should focus on the longitudinal placement and the height of the sill, and the mitigating efficiency of the sill reduces with increasing tidal range. Overall, a (temporary) sill has great potential to reduce salt intrusion in salt wedge estuaries if there is sufficient water depth available.

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土墩作为减轻河口盐分入侵的措施
在全球范围内,三角洲是重要的经济枢纽,部分原因是三角洲通过河流系统与内陆地区相连,同时又靠近海洋。然而,近海也带来了淡水被含盐海水污染的威胁,尤其是在干旱期间。本研究探讨了缓解河口盐入侵的潜在措施,即建造(临时)土围堰--美国洛杉矶新奥尔良附近密西西比河下游实施的一项措施。本研究就如何利用土墩缓解河口盐入侵提出了设计指南:设计重点应放在土墩的纵向布置和高度上,而且土墩的缓解效率会随着潮差的增加而降低。总体而言,如果有足够的水深,(临时)护岸在减少盐楔河口的盐入侵方面具有巨大潜力。
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来源期刊
Estuaries and Coasts
Estuaries and Coasts 环境科学-海洋与淡水生物学
CiteScore
5.60
自引率
11.10%
发文量
107
审稿时长
12-24 weeks
期刊介绍: Estuaries and Coasts is the journal of the Coastal and Estuarine Research Federation (CERF). Begun in 1977 as Chesapeake Science, the journal has gradually expanded its scope and circulation. Today, the journal publishes scholarly manuscripts on estuarine and near coastal ecosystems at the interface between the land and the sea where there are tidal fluctuations or sea water is diluted by fresh water. The interface is broadly defined to include estuaries and nearshore coastal waters including lagoons, wetlands, tidal fresh water, shores and beaches, but not the continental shelf. The journal covers research on physical, chemical, geological or biological processes, as well as applications to management of estuaries and coasts. The journal publishes original research findings, reviews and perspectives, techniques, comments, and management applications. Estuaries and Coasts will consider properly carried out studies that present inconclusive findings or document a failed replication of previously published work. Submissions that are primarily descriptive, strongly place-based, or only report on development of models or new methods without detailing their applications fall outside the scope of the journal.
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