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Estuarine sediment transport by gravity-driven movement of the nepheloid layer, Long Island Sound

Geo-Marine Letters

By:
, , , , and
DOI: 10.1007/s00367-008-0118-2

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Abstract

Interpretation of sidescan-sonar imagery provides evidence that down-slope gravity-driven movement of the nepheloid layer constitutes an important mode of transporting sediment into the basins of north-central Long Island Sound, a major US East Coast estuary. In the Western Basin, this transport mechanism has formed dendritic drainage systems characterized by branching patterns of low backscatter on the seafloor that exceed 7.4 km in length and progressively widen down-slope, reaching widths of over 0.6 km at their southern distal ends. Although much smaller, dendritic patterns of similar morphology are also present in the northwestern part of the Central Basin. Because many contaminants display affinities for adsorption onto fine-grained sediments, and because the Sound is affected by seasonal hypoxia, mechanisms and dispersal pathways by which inorganic and organic sediments are remobilized and transported impact the eventual fate of the contaminants and environmental health of the estuary. ?? Springer-Verlag 2008.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Estuarine sediment transport by gravity-driven movement of the nepheloid layer, Long Island Sound
Series title:
Geo-Marine Letters
DOI:
10.1007/s00367-008-0118-2
Volume
28
Issue:
4
Year Published:
2008
Language:
English
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
Geo-Marine Letters
First page:
245
Last page:
254