Hydrosedimentological disequilibrium in a small, urbanized watershed

Detalhes bibliográficos
Autor(a) principal: Silva,Alexandre Marco da
Data de Publicação: 2013
Outros Autores: Santos,Alexandre Ribas dos, Fernandes,Rodolpho Augusto, Urban,Rodrigo Custódio, Carvalho,Romulo Martins, Manfré,Luiz Augusto, Durrant,Steven Frederick
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Acta Limnologica Brasiliensia (Online)
Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S2179-975X2013000200005
Resumo: AIM: In this paper we estimate the sediment yield and other related information for a small urbanized watershed, located in Sorocaba, São Paulo State. The driving forces that produce the observed scenario are presented and discussed; METHODS: Over a year, water samples and hydrologic information concerning the river channel were collected monthly at one sampling site. In the laboratory, water samples were oven dried (80 ºC) and the total suspended solid weighed for each sample. To estimate sediment yield we used Colby's simplified method. The sediment delivery ratio (SDR) was estimated using two methods: the relief - length ratio and the bifurcation ratio; RESULTS: The annual sediment yield estimated for the period was 1,636.1 t. The total specific sediment yield was 541.7 t.km -2.y-1. Bedload was the predominant fraction. The SDR changed between 60 and 66% according to the method employed. CONCLUSIONS: The main driving forces of hydrosedimentological disequilibrium are the lack of riparian vegetation, the dumping of construction wastes at inadequate sites, and the launching of untreated sewage. Hence, if these three factors were controlled, a significant improvement in the environmental quality, particularly water quality, might be achieved.
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spelling Hydrosedimentological disequilibrium in a small, urbanized watershedhydrosedimentologyColby's simplified methodsediment yieldenvironmental impactAIM: In this paper we estimate the sediment yield and other related information for a small urbanized watershed, located in Sorocaba, São Paulo State. The driving forces that produce the observed scenario are presented and discussed; METHODS: Over a year, water samples and hydrologic information concerning the river channel were collected monthly at one sampling site. In the laboratory, water samples were oven dried (80 ºC) and the total suspended solid weighed for each sample. To estimate sediment yield we used Colby's simplified method. The sediment delivery ratio (SDR) was estimated using two methods: the relief - length ratio and the bifurcation ratio; RESULTS: The annual sediment yield estimated for the period was 1,636.1 t. The total specific sediment yield was 541.7 t.km -2.y-1. Bedload was the predominant fraction. The SDR changed between 60 and 66% according to the method employed. CONCLUSIONS: The main driving forces of hydrosedimentological disequilibrium are the lack of riparian vegetation, the dumping of construction wastes at inadequate sites, and the launching of untreated sewage. Hence, if these three factors were controlled, a significant improvement in the environmental quality, particularly water quality, might be achieved.Associação Brasileira de Limnologia2013-06-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S2179-975X2013000200005Acta Limnologica Brasiliensia v.25 n.2 2013reponame:Acta Limnologica Brasiliensia (Online)instname:Associação Brasileira de Limnologia (ABL)instacron:ABL10.1590/S2179-975X2013000200005info:eu-repo/semantics/openAccessSilva,Alexandre Marco daSantos,Alexandre Ribas dosFernandes,Rodolpho AugustoUrban,Rodrigo CustódioCarvalho,Romulo MartinsManfré,Luiz AugustoDurrant,Steven Frederickeng2013-11-08T00:00:00Zoai:scielo:S2179-975X2013000200005Revistahttp://www.ablimno.org.br/publiActa.phphttps://old.scielo.br/oai/scielo-oai.php||actalb@rc.unesp.br2179-975X0102-6712opendoar:2013-11-08T00:00Acta Limnologica Brasiliensia (Online) - Associação Brasileira de Limnologia (ABL)false
dc.title.none.fl_str_mv Hydrosedimentological disequilibrium in a small, urbanized watershed
title Hydrosedimentological disequilibrium in a small, urbanized watershed
spellingShingle Hydrosedimentological disequilibrium in a small, urbanized watershed
Silva,Alexandre Marco da
hydrosedimentology
Colby's simplified method
sediment yield
environmental impact
title_short Hydrosedimentological disequilibrium in a small, urbanized watershed
title_full Hydrosedimentological disequilibrium in a small, urbanized watershed
title_fullStr Hydrosedimentological disequilibrium in a small, urbanized watershed
title_full_unstemmed Hydrosedimentological disequilibrium in a small, urbanized watershed
title_sort Hydrosedimentological disequilibrium in a small, urbanized watershed
author Silva,Alexandre Marco da
author_facet Silva,Alexandre Marco da
Santos,Alexandre Ribas dos
Fernandes,Rodolpho Augusto
Urban,Rodrigo Custódio
Carvalho,Romulo Martins
Manfré,Luiz Augusto
Durrant,Steven Frederick
author_role author
author2 Santos,Alexandre Ribas dos
Fernandes,Rodolpho Augusto
Urban,Rodrigo Custódio
Carvalho,Romulo Martins
Manfré,Luiz Augusto
Durrant,Steven Frederick
author2_role author
author
author
author
author
author
dc.contributor.author.fl_str_mv Silva,Alexandre Marco da
Santos,Alexandre Ribas dos
Fernandes,Rodolpho Augusto
Urban,Rodrigo Custódio
Carvalho,Romulo Martins
Manfré,Luiz Augusto
Durrant,Steven Frederick
dc.subject.por.fl_str_mv hydrosedimentology
Colby's simplified method
sediment yield
environmental impact
topic hydrosedimentology
Colby's simplified method
sediment yield
environmental impact
description AIM: In this paper we estimate the sediment yield and other related information for a small urbanized watershed, located in Sorocaba, São Paulo State. The driving forces that produce the observed scenario are presented and discussed; METHODS: Over a year, water samples and hydrologic information concerning the river channel were collected monthly at one sampling site. In the laboratory, water samples were oven dried (80 ºC) and the total suspended solid weighed for each sample. To estimate sediment yield we used Colby's simplified method. The sediment delivery ratio (SDR) was estimated using two methods: the relief - length ratio and the bifurcation ratio; RESULTS: The annual sediment yield estimated for the period was 1,636.1 t. The total specific sediment yield was 541.7 t.km -2.y-1. Bedload was the predominant fraction. The SDR changed between 60 and 66% according to the method employed. CONCLUSIONS: The main driving forces of hydrosedimentological disequilibrium are the lack of riparian vegetation, the dumping of construction wastes at inadequate sites, and the launching of untreated sewage. Hence, if these three factors were controlled, a significant improvement in the environmental quality, particularly water quality, might be achieved.
publishDate 2013
dc.date.none.fl_str_mv 2013-06-01
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
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dc.identifier.uri.fl_str_mv http://old.scielo.br/scielo.php?script=sci_arttext&pid=S2179-975X2013000200005
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dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.1590/S2179-975X2013000200005
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv text/html
dc.publisher.none.fl_str_mv Associação Brasileira de Limnologia
publisher.none.fl_str_mv Associação Brasileira de Limnologia
dc.source.none.fl_str_mv Acta Limnologica Brasiliensia v.25 n.2 2013
reponame:Acta Limnologica Brasiliensia (Online)
instname:Associação Brasileira de Limnologia (ABL)
instacron:ABL
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institution ABL
reponame_str Acta Limnologica Brasiliensia (Online)
collection Acta Limnologica Brasiliensia (Online)
repository.name.fl_str_mv Acta Limnologica Brasiliensia (Online) - Associação Brasileira de Limnologia (ABL)
repository.mail.fl_str_mv ||actalb@rc.unesp.br
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