Wave dynamics and resuspension in Lake Guaíba (Brazil) with implications on points of water abstraction for human supply

Detalhes bibliográficos
Autor(a) principal: Nicolodi, João Luís
Data de Publicação: 2011
Outros Autores: Toldo Junior, Elirio Ernestino, Farina, Leandro
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da FURG (RI FURG)
Texto Completo: http://repositorio.furg.br/handle/1/2142
Resumo: This research examines the characteristics of Lake Guaíba’s waves with regard to their main parameters; significant wave height (Hs), period (T), direction of wave propagation and its connections with the ressuspension of sediments at the bottom. To this end, SWAN (Simulating Waves Nearshore) a type of software using mathematical modeling techniques, has been validated and applied, with its main inputs being the lake’s bathymetry, direction, wind speed and frequency in the region (between 1996 and 1997) in addition to currents, water level, density, and maximum and minimum frequencies, among others. The highest waves modeled reached 0.55 m in a few points of the lake, particularly when winds were blowing from the S and SE quadrants with an intensity of over 7 m/sec. Generally speaking, waves follow wind intensity and direction patterns, and reach maximum values in about 1 to 2 hours after wind speed peaks. Whenever winds were stronger, waves took some 2 hours to reach 0.10 m, but with weak to moderate winds, they took around 3 hours. In addition to speed and direction, wind regularity proved relevant in generating and propagating waves on Lake Guaíba. The lake’s sediment environments were mapped and rated as follows: 1) Depositional Environment (51% of the lake); 2) Transitional Environment (41%); and 3) Erosional or Non-Depositional Environment (8%). As a contribution to the region’s environmental management, subsidies have been created with relation to the concentration of particulate suspended matter. This potential has been defined as a percentage of time, throughout the year, in which the wave-created ressuspension of environment sediments can increase the pollution levels at places where water is currently captured for public supply in the Porto Alegre area.
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spelling Wave dynamics and resuspension in Lake Guaíba (Brazil) with implications on points of water abstraction for human supplyWave modelSwanLake's sediment environmentsThis research examines the characteristics of Lake Guaíba’s waves with regard to their main parameters; significant wave height (Hs), period (T), direction of wave propagation and its connections with the ressuspension of sediments at the bottom. To this end, SWAN (Simulating Waves Nearshore) a type of software using mathematical modeling techniques, has been validated and applied, with its main inputs being the lake’s bathymetry, direction, wind speed and frequency in the region (between 1996 and 1997) in addition to currents, water level, density, and maximum and minimum frequencies, among others. The highest waves modeled reached 0.55 m in a few points of the lake, particularly when winds were blowing from the S and SE quadrants with an intensity of over 7 m/sec. Generally speaking, waves follow wind intensity and direction patterns, and reach maximum values in about 1 to 2 hours after wind speed peaks. Whenever winds were stronger, waves took some 2 hours to reach 0.10 m, but with weak to moderate winds, they took around 3 hours. In addition to speed and direction, wind regularity proved relevant in generating and propagating waves on Lake Guaíba. The lake’s sediment environments were mapped and rated as follows: 1) Depositional Environment (51% of the lake); 2) Transitional Environment (41%); and 3) Erosional or Non-Depositional Environment (8%). As a contribution to the region’s environmental management, subsidies have been created with relation to the concentration of particulate suspended matter. This potential has been defined as a percentage of time, throughout the year, in which the wave-created ressuspension of environment sediments can increase the pollution levels at places where water is currently captured for public supply in the Porto Alegre area.2012-07-18T20:08:59Z2012-07-18T20:08:59Z2011info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfNICOLODI, João Luis; TOLDO JUNIOR, Elirio Ernestino; FARINA, Leandro. Wave dynamics and resuspension in Lake Guaíba (Brazil) with implications on points of water abstraction for human supply. Journal of Coastal Research, v. 64, p. 1550-1554, 2011. Disponível em:<http://www.ics2011.pl/artic/SP64_1550-1554_J.L.Nicolodi.pdf>. Acesso em: 2 jun. 2012.0749-0208http://repositorio.furg.br/handle/1/2142engNicolodi, João LuísToldo Junior, Elirio ErnestinoFarina, Leandroinfo:eu-repo/semantics/openAccessreponame:Repositório Institucional da FURG (RI FURG)instname:Universidade Federal do Rio Grande (FURG)instacron:FURG2023-01-24T19:20:10Zoai:repositorio.furg.br:1/2142Repositório InstitucionalPUBhttps://repositorio.furg.br/oai/request || http://200.19.254.174/oai/requestopendoar:2023-01-24T19:20:10Repositório Institucional da FURG (RI FURG) - Universidade Federal do Rio Grande (FURG)false
dc.title.none.fl_str_mv Wave dynamics and resuspension in Lake Guaíba (Brazil) with implications on points of water abstraction for human supply
title Wave dynamics and resuspension in Lake Guaíba (Brazil) with implications on points of water abstraction for human supply
spellingShingle Wave dynamics and resuspension in Lake Guaíba (Brazil) with implications on points of water abstraction for human supply
Nicolodi, João Luís
Wave model
Swan
Lake's sediment environments
title_short Wave dynamics and resuspension in Lake Guaíba (Brazil) with implications on points of water abstraction for human supply
title_full Wave dynamics and resuspension in Lake Guaíba (Brazil) with implications on points of water abstraction for human supply
title_fullStr Wave dynamics and resuspension in Lake Guaíba (Brazil) with implications on points of water abstraction for human supply
title_full_unstemmed Wave dynamics and resuspension in Lake Guaíba (Brazil) with implications on points of water abstraction for human supply
title_sort Wave dynamics and resuspension in Lake Guaíba (Brazil) with implications on points of water abstraction for human supply
author Nicolodi, João Luís
author_facet Nicolodi, João Luís
Toldo Junior, Elirio Ernestino
Farina, Leandro
author_role author
author2 Toldo Junior, Elirio Ernestino
Farina, Leandro
author2_role author
author
dc.contributor.author.fl_str_mv Nicolodi, João Luís
Toldo Junior, Elirio Ernestino
Farina, Leandro
dc.subject.por.fl_str_mv Wave model
Swan
Lake's sediment environments
topic Wave model
Swan
Lake's sediment environments
description This research examines the characteristics of Lake Guaíba’s waves with regard to their main parameters; significant wave height (Hs), period (T), direction of wave propagation and its connections with the ressuspension of sediments at the bottom. To this end, SWAN (Simulating Waves Nearshore) a type of software using mathematical modeling techniques, has been validated and applied, with its main inputs being the lake’s bathymetry, direction, wind speed and frequency in the region (between 1996 and 1997) in addition to currents, water level, density, and maximum and minimum frequencies, among others. The highest waves modeled reached 0.55 m in a few points of the lake, particularly when winds were blowing from the S and SE quadrants with an intensity of over 7 m/sec. Generally speaking, waves follow wind intensity and direction patterns, and reach maximum values in about 1 to 2 hours after wind speed peaks. Whenever winds were stronger, waves took some 2 hours to reach 0.10 m, but with weak to moderate winds, they took around 3 hours. In addition to speed and direction, wind regularity proved relevant in generating and propagating waves on Lake Guaíba. The lake’s sediment environments were mapped and rated as follows: 1) Depositional Environment (51% of the lake); 2) Transitional Environment (41%); and 3) Erosional or Non-Depositional Environment (8%). As a contribution to the region’s environmental management, subsidies have been created with relation to the concentration of particulate suspended matter. This potential has been defined as a percentage of time, throughout the year, in which the wave-created ressuspension of environment sediments can increase the pollution levels at places where water is currently captured for public supply in the Porto Alegre area.
publishDate 2011
dc.date.none.fl_str_mv 2011
2012-07-18T20:08:59Z
2012-07-18T20:08:59Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv NICOLODI, João Luis; TOLDO JUNIOR, Elirio Ernestino; FARINA, Leandro. Wave dynamics and resuspension in Lake Guaíba (Brazil) with implications on points of water abstraction for human supply. Journal of Coastal Research, v. 64, p. 1550-1554, 2011. Disponível em:<http://www.ics2011.pl/artic/SP64_1550-1554_J.L.Nicolodi.pdf>. Acesso em: 2 jun. 2012.
0749-0208
http://repositorio.furg.br/handle/1/2142
identifier_str_mv NICOLODI, João Luis; TOLDO JUNIOR, Elirio Ernestino; FARINA, Leandro. Wave dynamics and resuspension in Lake Guaíba (Brazil) with implications on points of water abstraction for human supply. Journal of Coastal Research, v. 64, p. 1550-1554, 2011. Disponível em:<http://www.ics2011.pl/artic/SP64_1550-1554_J.L.Nicolodi.pdf>. Acesso em: 2 jun. 2012.
0749-0208
url http://repositorio.furg.br/handle/1/2142
dc.language.iso.fl_str_mv eng
language eng
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.source.none.fl_str_mv reponame:Repositório Institucional da FURG (RI FURG)
instname:Universidade Federal do Rio Grande (FURG)
instacron:FURG
instname_str Universidade Federal do Rio Grande (FURG)
instacron_str FURG
institution FURG
reponame_str Repositório Institucional da FURG (RI FURG)
collection Repositório Institucional da FURG (RI FURG)
repository.name.fl_str_mv Repositório Institucional da FURG (RI FURG) - Universidade Federal do Rio Grande (FURG)
repository.mail.fl_str_mv
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