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Measuring Fluorescent Dye in the Bubbly and Sediment-Laden Surfzone

Decisions about recreational beach closures would be enhanced if better estimates of surfzone contaminant transport and dilution were available. In situ methods for measuring fluorescent Rhodamine WT dye tracer in the surfzone are presented, increasing the temporal and spatial resolution over previo...

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Detalles Bibliográficos
Autores principales: Clark, David B., Feddersen, Falk, Omand, Melissa M., Guza, R. T.
Formato: Texto
Lenguaje:English
Publicado: Springer Netherlands 2009
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2773363/
https://www.ncbi.nlm.nih.gov/pubmed/19898671
http://dx.doi.org/10.1007/s11270-009-0030-z
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author Clark, David B.
Feddersen, Falk
Omand, Melissa M.
Guza, R. T.
author_facet Clark, David B.
Feddersen, Falk
Omand, Melissa M.
Guza, R. T.
author_sort Clark, David B.
collection PubMed
description Decisions about recreational beach closures would be enhanced if better estimates of surfzone contaminant transport and dilution were available. In situ methods for measuring fluorescent Rhodamine WT dye tracer in the surfzone are presented, increasing the temporal and spatial resolution over previous surfzone techniques. Bubbles and sand suspended by breaking waves in the surfzone interfere with in situ optical fluorometer dye measurements, increasing the lower bound for dye detection (≈ 1 ppb) and reducing (quenching) measured dye concentrations. Simultaneous turbidity measurements are used to estimate the level of bubble and sand interference and correct dye estimates. After correction, root-mean-square dye concentration errors are estimated to be < 5% of dye concentration magnitude, thus demonstrating the viability of in situ surfzone fluorescent dye measurements. The surfzone techniques developed here may be applicable to other environments with high bubble and sand concentrations (e.g., cascading rivers and streams).
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spelling pubmed-27733632009-11-06 Measuring Fluorescent Dye in the Bubbly and Sediment-Laden Surfzone Clark, David B. Feddersen, Falk Omand, Melissa M. Guza, R. T. Water Air Soil Pollut Article Decisions about recreational beach closures would be enhanced if better estimates of surfzone contaminant transport and dilution were available. In situ methods for measuring fluorescent Rhodamine WT dye tracer in the surfzone are presented, increasing the temporal and spatial resolution over previous surfzone techniques. Bubbles and sand suspended by breaking waves in the surfzone interfere with in situ optical fluorometer dye measurements, increasing the lower bound for dye detection (≈ 1 ppb) and reducing (quenching) measured dye concentrations. Simultaneous turbidity measurements are used to estimate the level of bubble and sand interference and correct dye estimates. After correction, root-mean-square dye concentration errors are estimated to be < 5% of dye concentration magnitude, thus demonstrating the viability of in situ surfzone fluorescent dye measurements. The surfzone techniques developed here may be applicable to other environments with high bubble and sand concentrations (e.g., cascading rivers and streams). Springer Netherlands 2009-04-16 2009 /pmc/articles/PMC2773363/ /pubmed/19898671 http://dx.doi.org/10.1007/s11270-009-0030-z Text en © The Author(s) 2009 https://creativecommons.org/licenses/by-nc/4.0/This article is distributed under the terms of the Creative Commons Attribution Noncommercial License which permits any noncommercial use, distribution, and reproduction in any medium, provided the original author(s) and source are credited.
spellingShingle Article
Clark, David B.
Feddersen, Falk
Omand, Melissa M.
Guza, R. T.
Measuring Fluorescent Dye in the Bubbly and Sediment-Laden Surfzone
title Measuring Fluorescent Dye in the Bubbly and Sediment-Laden Surfzone
title_full Measuring Fluorescent Dye in the Bubbly and Sediment-Laden Surfzone
title_fullStr Measuring Fluorescent Dye in the Bubbly and Sediment-Laden Surfzone
title_full_unstemmed Measuring Fluorescent Dye in the Bubbly and Sediment-Laden Surfzone
title_short Measuring Fluorescent Dye in the Bubbly and Sediment-Laden Surfzone
title_sort measuring fluorescent dye in the bubbly and sediment-laden surfzone
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2773363/
https://www.ncbi.nlm.nih.gov/pubmed/19898671
http://dx.doi.org/10.1007/s11270-009-0030-z
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