File:A field investigation of diffusion within a submerged plant canopy (IA fieldinvestigati00tarr).pdf

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A field investigation of diffusion within a submerged plant canopy   (Wikidata search (Cirrus search) Wikidata query (SPARQL)  Create new Wikidata item based on this file)
Author
Tarrell, Alvin E
image of artwork listed in title parameter on this page
Title
A field investigation of diffusion within a submerged plant canopy
Publisher
Springfield, Va. : Available from National Technical Information Service
Description
Thesis (M.S. in Oceanographic Engineering)--Massachusetts Institute of Technology and the Woods Hole Oceanographic Institution and (Master of Engineering in Civil and Environmental Engineering) Massachusetts Institute of Technology, Sept. 1997
Includes bibliographical references (leaves 66-69)
Saltwater marshes and wetlands are important buffers at the land-sea interface. Among the most biologically active ecosystems on Earth, natural and man-made wetlands are important interceptors of pollutants and nutrients bound for the coastal ocean. The transport, dilution, and deposition processes occurring within the marsh are key factors in determining this interception, and these are in turn determined largely by tidally driven flows as influenced by marsh vegetation and other physical characteristics. Vegetation type and density are of primary importance in these processes, both for pollutant and nutrient uptake concerns and in determining hydrodynamic characteristics of the marsh. This study examines the effect of vegetation density and ambient flow on diffusivity within a tidal marsh canopy, specifically Spartina alterniflora. Vegetation densities from 0-1.4% stem coverage and flows from 2-12 cm/sec were investigated using Rhodamine WT tracer, with esultant measured diffusivities ranging from approximately 0.5-3.0 sq cm/sec. Diffusivity was found to be a strong function of ambient current, but a much weaker function of vegetation density. Presence of vegetation caused transverse and vertical diffusivities to be essentially isotropic over all vegetation densities, as opposed to the order of magnitude difference found in earlier non vegetated studies. Only slight vegetation coverage was found to be necessary to produce this isotropy, with little additional change as stem density increased

Subjects: ECOSYSTEMS; WETLANDS
Language English
Publication date 1997
publication_date QS:P577,+1997-00-00T00:00:00Z/9
Current location
IA Collections: navalpostgraduateschoollibrary; fedlink; americana
Accession number
fieldinvestigati00tarr
Authority file  OCLC: 1045337725
Source
Internet Archive identifier: fieldinvestigati00tarr
https://archive.org/download/fieldinvestigati00tarr/fieldinvestigati00tarr.pdf

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Public domain
This work is in the public domain in the United States because it is a work prepared by an officer or employee of the United States Government as part of that person’s official duties under the terms of Title 17, Chapter 1, Section 105 of the US Code. Note: This only applies to original works of the Federal Government and not to the work of any individual U.S. state, territory, commonwealth, county, municipality, or any other subdivision. This template also does not apply to postage stamp designs published by the United States Postal Service since 1978. (See § 313.6(C)(1) of Compendium of U.S. Copyright Office Practices). It also does not apply to certain US coins; see The US Mint Terms of Use.
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