Water column light attenuation in Danshuei River Estuary, Taiwan
The penetration of sunlight into the water column plays a critical role in the aquatic ecosystem. This study investigates light attenuation through the water column of the Danshuei River estuary and explores the models for quantifying it. The measurement of photosynthetically active radiation (PAR)...
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Veröffentlicht in: | Journal of the American Water Resources Association 2005-04, Vol.41 (2), p.425-435 |
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creator | Liu, W.C Hsu, M.H Chen, S.Y Wu, C.R Kuo, A.Y |
description | The penetration of sunlight into the water column plays a critical role in the aquatic ecosystem. This study investigates light attenuation through the water column of the Danshuei River estuary and explores the models for quantifying it. The measurement of photosynthetically active radiation (PAR) indicates that the conventional exponential attenuation of light with depth is a very good model. A light attenuation coefficient may be derived from the PAR measurements at each location. The simpler measurements of Secchi depth (SD) provide an approximate estimate of the attenuation coefficients through an inverse linear relationship. The results also reveal that the amount and kinds of materials, which are either dissolved or suspended in the water, control light attenuation through the water column. However, the linear regression with such a model results in very poor correlation, and a relatively large constant term for the Danshuei River estuary. The regression with salinity yields a good correlation, indicating that the fraction of sea water might be a good parameter for estimating light attenuation coefficient for practical application in the Danshuei River estuary. |
doi_str_mv | 10.1111/j.1752-1688.2005.tb03746.x |
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This study investigates light attenuation through the water column of the Danshuei River estuary and explores the models for quantifying it. The measurement of photosynthetically active radiation (PAR) indicates that the conventional exponential attenuation of light with depth is a very good model. A light attenuation coefficient may be derived from the PAR measurements at each location. The simpler measurements of Secchi depth (SD) provide an approximate estimate of the attenuation coefficients through an inverse linear relationship. The results also reveal that the amount and kinds of materials, which are either dissolved or suspended in the water, control light attenuation through the water column. However, the linear regression with such a model results in very poor correlation, and a relatively large constant term for the Danshuei River estuary. The regression with salinity yields a good correlation, indicating that the fraction of sea water might be a good parameter for estimating light attenuation coefficient for practical application in the Danshuei River estuary.</description><identifier>ISSN: 1093-474X</identifier><identifier>EISSN: 1752-1688</identifier><identifier>DOI: 10.1111/j.1752-1688.2005.tb03746.x</identifier><identifier>CODEN: JWRAF5</identifier><language>eng</language><publisher>Oxford, UK: Blackwell Publishing Ltd</publisher><subject>Brackish ; Danshuei River estuary ; Earth sciences ; Earth, ocean, space ; estuaries ; Exact sciences and technology ; Freshwater ; Hydrology ; Hydrology. Hydrogeology ; light attenuation ; light penetration ; linear models ; Marine and continental quaternary ; photosynthetically active radiation ; regression analysis ; salinity ; Secchi depth ; solar radiation ; Surficial geology ; suspended sediment ; total suspended solids ; turbidity ; water quality</subject><ispartof>Journal of the American Water Resources Association, 2005-04, Vol.41 (2), p.425-435</ispartof><rights>2005 INIST-CNRS</rights><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c448t-f70244d0000c19645e69e1eea1ab416e79c5c244de11a9a02f6917947b410fa03</citedby><cites>FETCH-LOGICAL-c448t-f70244d0000c19645e69e1eea1ab416e79c5c244de11a9a02f6917947b410fa03</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,780,784,27924,27925</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=16750562$$DView record in Pascal Francis$$Hfree_for_read</backlink></links><search><creatorcontrib>Liu, W.C</creatorcontrib><creatorcontrib>Hsu, M.H</creatorcontrib><creatorcontrib>Chen, S.Y</creatorcontrib><creatorcontrib>Wu, C.R</creatorcontrib><creatorcontrib>Kuo, A.Y</creatorcontrib><title>Water column light attenuation in Danshuei River Estuary, Taiwan</title><title>Journal of the American Water Resources Association</title><description>The penetration of sunlight into the water column plays a critical role in the aquatic ecosystem. This study investigates light attenuation through the water column of the Danshuei River estuary and explores the models for quantifying it. The measurement of photosynthetically active radiation (PAR) indicates that the conventional exponential attenuation of light with depth is a very good model. A light attenuation coefficient may be derived from the PAR measurements at each location. The simpler measurements of Secchi depth (SD) provide an approximate estimate of the attenuation coefficients through an inverse linear relationship. The results also reveal that the amount and kinds of materials, which are either dissolved or suspended in the water, control light attenuation through the water column. However, the linear regression with such a model results in very poor correlation, and a relatively large constant term for the Danshuei River estuary. The regression with salinity yields a good correlation, indicating that the fraction of sea water might be a good parameter for estimating light attenuation coefficient for practical application in the Danshuei River estuary.</description><subject>Brackish</subject><subject>Danshuei River estuary</subject><subject>Earth sciences</subject><subject>Earth, ocean, space</subject><subject>estuaries</subject><subject>Exact sciences and technology</subject><subject>Freshwater</subject><subject>Hydrology</subject><subject>Hydrology. 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Hydrogeology</topic><topic>light attenuation</topic><topic>light penetration</topic><topic>linear models</topic><topic>Marine and continental quaternary</topic><topic>photosynthetically active radiation</topic><topic>regression analysis</topic><topic>salinity</topic><topic>Secchi depth</topic><topic>solar radiation</topic><topic>Surficial geology</topic><topic>suspended sediment</topic><topic>total suspended solids</topic><topic>turbidity</topic><topic>water quality</topic><toplevel>online_resources</toplevel><creatorcontrib>Liu, W.C</creatorcontrib><creatorcontrib>Hsu, M.H</creatorcontrib><creatorcontrib>Chen, S.Y</creatorcontrib><creatorcontrib>Wu, C.R</creatorcontrib><creatorcontrib>Kuo, A.Y</creatorcontrib><collection>AGRIS</collection><collection>Istex</collection><collection>Pascal-Francis</collection><collection>CrossRef</collection><collection>Environment Abstracts</collection><collection>Environmental Sciences and Pollution Management</collection><collection>Environment Abstracts</collection><collection>Aqualine</collection><collection>Oceanic Abstracts</collection><collection>Water Resources Abstracts</collection><collection>ASFA: Aquatic Sciences and Fisheries Abstracts</collection><collection>Aquatic Science & Fisheries Abstracts (ASFA) 2: Ocean Technology, Policy & Non-Living Resources</collection><collection>Aquatic Science & Fisheries Abstracts (ASFA) Professional</collection><collection>Meteorological & Geoastrophysical Abstracts</collection><collection>Aquatic Science & Fisheries Abstracts (ASFA) 3: Aquatic Pollution & Environmental Quality</collection><collection>Meteorological & Geoastrophysical Abstracts - Academic</collection><jtitle>Journal of the American Water Resources Association</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Liu, W.C</au><au>Hsu, M.H</au><au>Chen, S.Y</au><au>Wu, C.R</au><au>Kuo, A.Y</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Water column light attenuation in Danshuei River Estuary, Taiwan</atitle><jtitle>Journal of the American Water Resources Association</jtitle><date>2005-04-01</date><risdate>2005</risdate><volume>41</volume><issue>2</issue><spage>425</spage><epage>435</epage><pages>425-435</pages><issn>1093-474X</issn><eissn>1752-1688</eissn><coden>JWRAF5</coden><abstract>The penetration of sunlight into the water column plays a critical role in the aquatic ecosystem. This study investigates light attenuation through the water column of the Danshuei River estuary and explores the models for quantifying it. The measurement of photosynthetically active radiation (PAR) indicates that the conventional exponential attenuation of light with depth is a very good model. A light attenuation coefficient may be derived from the PAR measurements at each location. The simpler measurements of Secchi depth (SD) provide an approximate estimate of the attenuation coefficients through an inverse linear relationship. The results also reveal that the amount and kinds of materials, which are either dissolved or suspended in the water, control light attenuation through the water column. However, the linear regression with such a model results in very poor correlation, and a relatively large constant term for the Danshuei River estuary. The regression with salinity yields a good correlation, indicating that the fraction of sea water might be a good parameter for estimating light attenuation coefficient for practical application in the Danshuei River estuary.</abstract><cop>Oxford, UK</cop><pub>Blackwell Publishing Ltd</pub><doi>10.1111/j.1752-1688.2005.tb03746.x</doi><tpages>11</tpages></addata></record> |
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subjects | Brackish Danshuei River estuary Earth sciences Earth, ocean, space estuaries Exact sciences and technology Freshwater Hydrology Hydrology. Hydrogeology light attenuation light penetration linear models Marine and continental quaternary photosynthetically active radiation regression analysis salinity Secchi depth solar radiation Surficial geology suspended sediment total suspended solids turbidity water quality |
title | Water column light attenuation in Danshuei River Estuary, Taiwan |
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