Dinâmica dos escoamentos na modelagem da produção de sedimentos em uma pequena bacia rural
Ano de defesa: | 2016 |
---|---|
Autor(a) principal: | |
Orientador(a): | |
Banca de defesa: | , , , |
Tipo de documento: | Tese |
Tipo de acesso: | Acesso aberto |
Idioma: | por |
Instituição de defesa: |
Universidade Federal de Santa Maria
|
Programa de Pós-Graduação: |
Programa de Pós-Graduação em Ciência do Solo
|
Departamento: |
Agronomia
|
País: |
BR
|
Palavras-chave em Português: | |
Palavras-chave em Inglês: | |
Área do conhecimento CNPq: | |
Link de acesso: | http://repositorio.ufsm.br/handle/1/3377 |
Resumo: | The models based on spatially distributed processes describe erosion and sediment yield using a physical approach of the mechanisms. In general, these models require high quality input data, description of the landscape, insertion of the physical processes involved, among others. Thus, it is not uncommon to find models that due to some operational difficulty do not fit well in the natural processes. Therefore, the objective of this study was to understand the hydrological and sedimentological dynamics of the Arvorezinha/RS experimental catchment in order to set the constraints of mathematical modeling that generate the overestimation in modeling the suspended sediment concentration (SSC) and sediment yield (SY). The study took place in the Arvorezinha experimental catchment, located in southern Brazil, which possesses a total drainage area of 1.23km2. Along with hidrossedimentological monitoring, there was an insertion of solute analysis through dissolved silicon (Sid) and particulate during and between precipitation events. This was carried out to understand the hydrological behavior of the catchment as well as assist in flow separation. The mathematical modelling of the erosive process was done with the LISEM model for the nine events monitored with Sid. In addition, we conducted an analysis of extreme events and variables responses, especially for SY, between 2010 and 2015. The years of 2014 and 2015 were the wettest since 2010, which had around 2.500mm of rain. The events monitored with Sid led us to conclude that the sub-surface flows have the biggest contribution during the event of precipitation, especially in events that take place in autumn-winter and low-average magnitude. Furthermore, it was possible to observe the effect of dilution that occurs during the events, that is, as liquid discharge increases, the concentration of Sid reduces. This is reflected in the suspended sediment concentration, because, as the event occurs, the SSC resulting from the surface flow will be diluted in the subsurface flow. Because, according to the present study, these water movements with lower speeds have a very important role in the hydrograph (it was higher than or close to 50% of the total volume). Therefore, the modeling of the erosive process is significantly influenced by the contribution of the slow flows (subsurface and groundwater flow), given that the model simulates the quick flow (superficial). In this way, LISEM model usage in areas with lower flow speeds can be limited; consequently, a greater level of care is required when concluding on the use of the model and their capacity to represent the hidrossedimentological processes. |
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2016-09-152016-09-152016-03-01BARROS, Claudia Alessandra Peixoto de. Dynamics of flow in the modeling of sediment yield in a small rural catchment. 2016. 197 f. Tese (Doutorado em Agronomia) - Universidade Federal de Santa Maria, Santa Maria, 2016.http://repositorio.ufsm.br/handle/1/3377The models based on spatially distributed processes describe erosion and sediment yield using a physical approach of the mechanisms. In general, these models require high quality input data, description of the landscape, insertion of the physical processes involved, among others. Thus, it is not uncommon to find models that due to some operational difficulty do not fit well in the natural processes. Therefore, the objective of this study was to understand the hydrological and sedimentological dynamics of the Arvorezinha/RS experimental catchment in order to set the constraints of mathematical modeling that generate the overestimation in modeling the suspended sediment concentration (SSC) and sediment yield (SY). The study took place in the Arvorezinha experimental catchment, located in southern Brazil, which possesses a total drainage area of 1.23km2. Along with hidrossedimentological monitoring, there was an insertion of solute analysis through dissolved silicon (Sid) and particulate during and between precipitation events. This was carried out to understand the hydrological behavior of the catchment as well as assist in flow separation. The mathematical modelling of the erosive process was done with the LISEM model for the nine events monitored with Sid. In addition, we conducted an analysis of extreme events and variables responses, especially for SY, between 2010 and 2015. The years of 2014 and 2015 were the wettest since 2010, which had around 2.500mm of rain. The events monitored with Sid led us to conclude that the sub-surface flows have the biggest contribution during the event of precipitation, especially in events that take place in autumn-winter and low-average magnitude. Furthermore, it was possible to observe the effect of dilution that occurs during the events, that is, as liquid discharge increases, the concentration of Sid reduces. This is reflected in the suspended sediment concentration, because, as the event occurs, the SSC resulting from the surface flow will be diluted in the subsurface flow. Because, according to the present study, these water movements with lower speeds have a very important role in the hydrograph (it was higher than or close to 50% of the total volume). Therefore, the modeling of the erosive process is significantly influenced by the contribution of the slow flows (subsurface and groundwater flow), given that the model simulates the quick flow (superficial). In this way, LISEM model usage in areas with lower flow speeds can be limited; consequently, a greater level of care is required when concluding on the use of the model and their capacity to represent the hidrossedimentological processes.Os modelos baseados em processos espacialmente distribuídos descrevem a erosão e a produção de sedimentos utilizando uma abordagem física dos mecanismos. Em geral, esses modelos exigem alta qualidade nos dados de entrada, descrição da paisagem, inserção dos processos físicos envolvidos, entre outros. Assim, não é raro encontrarmos modelos que, por alguma dificuldade operacional, não se ajustem bem aos processos naturais. Dessa forma, o objetivo do estudo foi compreender a dinâmica hidrológica e sedimentológica da bacia experimental de Arvorezinha/RS, para definir os condicionantes da modelagem matemática que geram a superestimava na modelagem da concentração de sedimentos em suspensão e da produção de sedimentos (PS). O estudo ocorreu na bacia experimental de Arvorezinha, sul do Brasil, com área de drenagem de 1,23km2. Juntamente ao monitoramento hidrossedimentológico, houve a inserção da análise de solutos por meio do silício dissolvido (Sid) e particulado durante eventos e entre eventos de precipitação. O monitoramento com Sid foi realizado para compreender o comportamento hidrológico da bacia hidrográfica, bem como auxiliar na separação dos escoamentos. A modelagem matemática do processo erosivo foi realizada com o modelo LISEM para os nove eventos monitorados com Sid. Além disso, foi realizada uma análise dos eventos extremos e das variáveis respostas, principalmente a PS, entre 2010 e 2015. Os anos de 2014 e 2015 foram os mais chuvosos desde 2010, com, aproximadamente, 2.500mm ao ano. Os eventos monitorados com Sid permitiram concluir que os escoamentos subsuperficiais possuem a maior contribuição de água no hidrograma durante o evento de precipitação, principalmente em eventos que ocorrem no outono-inverno e de baixa-média magnitude. Além disso, pôde-se verificar o efeito de diluição que ocorre durante os eventos, isto é, com o aumento da descarga líquida, a concentração de Sid reduz. Isso reflete-se na concentração de sedimentos em suspensão (Css), pois, havendo o evento, a Css de origem do escoamento superficial será diluída nos escoamentos subsuperficiais, uma vez que, conforme o estudo aqui realizado, esses movimentos de água mais lentos apresentam um papel muito importante no hidrograma (foi superior ou próximo a 50% do volume total). Portanto, a modelagem do processo erosivo na bacia experimental de Arvorezinha é significativamente influenciada pela contribuição dos fluxos lentos (subsuperficial e subterrâneo), uma vez que o modelo simula o escoamento rápido (superficial). Desse modo, o uso do modelo LISEM em áreas com a presença de escoamentos de menor velocidade pode ser limitado; por isso, é necessário cuidado ao obter conclusões sobre o uso do modelo e a capacidade do mesmo em representar os processos hidrossedimentológicos.Coordenação de Aperfeiçoamento de Pessoal de Nível Superiorapplication/pdfporUniversidade Federal de Santa MariaPrograma de Pós-Graduação em Ciência do SoloUFSMBRAgronomiaTraçador geoquímicoEscoamentos subsuperficiaisModelagem matemáticaProdução de sedimentoGeochemical tracerSubsurface flowsMathematical modelingSediment yieldCNPQ::CIENCIAS AGRARIAS::AGRONOMIADinâmica dos escoamentos na modelagem da produção de sedimentos em uma pequena bacia ruralDynamics of flow in the modeling of sediment yield in a small rural catchmentinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/doctoralThesisMinella, Jean Paolo Gomeshttp://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4760855H0Merten, Gustavo Henriquehttp://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4785944Y6Tassi, Rutinéiahttp://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4707966H9Reichert, José Miguelhttp://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4787840U9Reinert, Dalvan Joséhttp://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4793527A1http://lattes.cnpq.br/4237446845974333Barros, Claudia Alessandra Peixoto de5001000000094003003003003003003000be3342c-3c6d-4254-86a4-ae1d23338ab79f4bbb04-fae5-4ac1-af96-cdca86316e1ef3c2fc69-918f-48ea-a5f6-d20796efe6d6b3c86d3a-b872-4e93-9e9a-fca1239bf68cc522cd45-5f51-4aaa-82ca-b343b9270e39d5bda32f-f9c3-4efa-bc87-f8be5a2c2a37info:eu-repo/semantics/openAccessreponame:Manancial - Repositório Digital da UFSMinstname:Universidade Federal de Santa Maria (UFSM)instacron:UFSMORIGINALBARROS, CLAUDIA ALESSANDRA PEIXOTO DE.pdfapplication/pdf7745301http://repositorio.ufsm.br/bitstream/1/3377/1/BARROS%2c%20CLAUDIA%20ALESSANDRA%20PEIXOTO%20DE.pdf694245e8ac4b0812d1cb650f2dce24c9MD51TEXTBARROS, CLAUDIA ALESSANDRA PEIXOTO DE.pdf.txtBARROS, CLAUDIA ALESSANDRA PEIXOTO DE.pdf.txtExtracted texttext/plain345843http://repositorio.ufsm.br/bitstream/1/3377/2/BARROS%2c%20CLAUDIA%20ALESSANDRA%20PEIXOTO%20DE.pdf.txtac75df770ebc4f3a2fa76e1d712b332bMD52THUMBNAILBARROS, CLAUDIA ALESSANDRA PEIXOTO DE.pdf.jpgBARROS, CLAUDIA ALESSANDRA PEIXOTO DE.pdf.jpgIM Thumbnailimage/jpeg4404http://repositorio.ufsm.br/bitstream/1/3377/3/BARROS%2c%20CLAUDIA%20ALESSANDRA%20PEIXOTO%20DE.pdf.jpg672c1c6a1a1c3a12434b3be14e43ee20MD531/33772017-07-25 10:54:21.829oai:repositorio.ufsm.br:1/3377Repositório Institucionalhttp://repositorio.ufsm.br/PUBhttp://repositorio.ufsm.br/oai/requestopendoar:39132017-07-25T13:54:21Manancial - Repositório Digital da UFSM - Universidade Federal de Santa Maria (UFSM)false |
dc.title.por.fl_str_mv |
Dinâmica dos escoamentos na modelagem da produção de sedimentos em uma pequena bacia rural |
dc.title.alternative.eng.fl_str_mv |
Dynamics of flow in the modeling of sediment yield in a small rural catchment |
title |
Dinâmica dos escoamentos na modelagem da produção de sedimentos em uma pequena bacia rural |
spellingShingle |
Dinâmica dos escoamentos na modelagem da produção de sedimentos em uma pequena bacia rural Barros, Claudia Alessandra Peixoto de Traçador geoquímico Escoamentos subsuperficiais Modelagem matemática Produção de sedimento Geochemical tracer Subsurface flows Mathematical modeling Sediment yield CNPQ::CIENCIAS AGRARIAS::AGRONOMIA |
title_short |
Dinâmica dos escoamentos na modelagem da produção de sedimentos em uma pequena bacia rural |
title_full |
Dinâmica dos escoamentos na modelagem da produção de sedimentos em uma pequena bacia rural |
title_fullStr |
Dinâmica dos escoamentos na modelagem da produção de sedimentos em uma pequena bacia rural |
title_full_unstemmed |
Dinâmica dos escoamentos na modelagem da produção de sedimentos em uma pequena bacia rural |
title_sort |
Dinâmica dos escoamentos na modelagem da produção de sedimentos em uma pequena bacia rural |
author |
Barros, Claudia Alessandra Peixoto de |
author_facet |
Barros, Claudia Alessandra Peixoto de |
author_role |
author |
dc.contributor.advisor1.fl_str_mv |
Minella, Jean Paolo Gomes |
dc.contributor.advisor1Lattes.fl_str_mv |
http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4760855H0 |
dc.contributor.referee1.fl_str_mv |
Merten, Gustavo Henrique |
dc.contributor.referee1Lattes.fl_str_mv |
http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4785944Y6 |
dc.contributor.referee2.fl_str_mv |
Tassi, Rutinéia |
dc.contributor.referee2Lattes.fl_str_mv |
http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4707966H9 |
dc.contributor.referee3.fl_str_mv |
Reichert, José Miguel |
dc.contributor.referee3Lattes.fl_str_mv |
http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4787840U9 |
dc.contributor.referee4.fl_str_mv |
Reinert, Dalvan José |
dc.contributor.referee4Lattes.fl_str_mv |
http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4793527A1 |
dc.contributor.authorLattes.fl_str_mv |
http://lattes.cnpq.br/4237446845974333 |
dc.contributor.author.fl_str_mv |
Barros, Claudia Alessandra Peixoto de |
contributor_str_mv |
Minella, Jean Paolo Gomes Merten, Gustavo Henrique Tassi, Rutinéia Reichert, José Miguel Reinert, Dalvan José |
dc.subject.por.fl_str_mv |
Traçador geoquímico Escoamentos subsuperficiais Modelagem matemática Produção de sedimento |
topic |
Traçador geoquímico Escoamentos subsuperficiais Modelagem matemática Produção de sedimento Geochemical tracer Subsurface flows Mathematical modeling Sediment yield CNPQ::CIENCIAS AGRARIAS::AGRONOMIA |
dc.subject.eng.fl_str_mv |
Geochemical tracer Subsurface flows Mathematical modeling Sediment yield |
dc.subject.cnpq.fl_str_mv |
CNPQ::CIENCIAS AGRARIAS::AGRONOMIA |
description |
The models based on spatially distributed processes describe erosion and sediment yield using a physical approach of the mechanisms. In general, these models require high quality input data, description of the landscape, insertion of the physical processes involved, among others. Thus, it is not uncommon to find models that due to some operational difficulty do not fit well in the natural processes. Therefore, the objective of this study was to understand the hydrological and sedimentological dynamics of the Arvorezinha/RS experimental catchment in order to set the constraints of mathematical modeling that generate the overestimation in modeling the suspended sediment concentration (SSC) and sediment yield (SY). The study took place in the Arvorezinha experimental catchment, located in southern Brazil, which possesses a total drainage area of 1.23km2. Along with hidrossedimentological monitoring, there was an insertion of solute analysis through dissolved silicon (Sid) and particulate during and between precipitation events. This was carried out to understand the hydrological behavior of the catchment as well as assist in flow separation. The mathematical modelling of the erosive process was done with the LISEM model for the nine events monitored with Sid. In addition, we conducted an analysis of extreme events and variables responses, especially for SY, between 2010 and 2015. The years of 2014 and 2015 were the wettest since 2010, which had around 2.500mm of rain. The events monitored with Sid led us to conclude that the sub-surface flows have the biggest contribution during the event of precipitation, especially in events that take place in autumn-winter and low-average magnitude. Furthermore, it was possible to observe the effect of dilution that occurs during the events, that is, as liquid discharge increases, the concentration of Sid reduces. This is reflected in the suspended sediment concentration, because, as the event occurs, the SSC resulting from the surface flow will be diluted in the subsurface flow. Because, according to the present study, these water movements with lower speeds have a very important role in the hydrograph (it was higher than or close to 50% of the total volume). Therefore, the modeling of the erosive process is significantly influenced by the contribution of the slow flows (subsurface and groundwater flow), given that the model simulates the quick flow (superficial). In this way, LISEM model usage in areas with lower flow speeds can be limited; consequently, a greater level of care is required when concluding on the use of the model and their capacity to represent the hidrossedimentological processes. |
publishDate |
2016 |
dc.date.accessioned.fl_str_mv |
2016-09-15 |
dc.date.available.fl_str_mv |
2016-09-15 |
dc.date.issued.fl_str_mv |
2016-03-01 |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/doctoralThesis |
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doctoralThesis |
status_str |
publishedVersion |
dc.identifier.citation.fl_str_mv |
BARROS, Claudia Alessandra Peixoto de. Dynamics of flow in the modeling of sediment yield in a small rural catchment. 2016. 197 f. Tese (Doutorado em Agronomia) - Universidade Federal de Santa Maria, Santa Maria, 2016. |
dc.identifier.uri.fl_str_mv |
http://repositorio.ufsm.br/handle/1/3377 |
identifier_str_mv |
BARROS, Claudia Alessandra Peixoto de. Dynamics of flow in the modeling of sediment yield in a small rural catchment. 2016. 197 f. Tese (Doutorado em Agronomia) - Universidade Federal de Santa Maria, Santa Maria, 2016. |
url |
http://repositorio.ufsm.br/handle/1/3377 |
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por |
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