Sedimentological study of the fluvial environments from the Eastern Chaco

Some sedimentological aspects of fluvial environments situated in the flood-plain of the Paraguay-Paraná river system (Northeastern of Argentina) were analized. The concentrations of suspended sediments, and the granulometric and textural characteristics of the bottom materials, were compared. The s...

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Autor principal: Orfeo, Oscar
Formato: Artículo revista
Lenguaje:Español
Publicado: Centro de Ecología Aplicada del Litoral (Consejo Nacional de Investigaciones Científicas y Técnicas - Universidad Nacional de Nordeste) 2023
Acceso en línea:https://revistas.unne.edu.ar/index.php/sub/article/view/7170
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Revistas UNNE - Universidad Nacional del Noroeste (UNNE) de Universidad Nacional del Nordeste
id I48-R154-article-7170
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spelling I48-R154-article-71702023-12-06T14:09:10Z Sedimentological study of the fluvial environments from the Eastern Chaco Estudio sedimentológico de ambientes fluviales del Chaco Oriental Orfeo, Oscar Some sedimentological aspects of fluvial environments situated in the flood-plain of the Paraguay-Paraná river system (Northeastern of Argentina) were analized. The concentrations of suspended sediments, and the granulometric and textural characteristics of the bottom materials, were compared. The suspended load had an inverse relation with the hydrometric levels with exception of the highly saline streams (conductivity values between 4300 and 11000 uS.cm-1) showing the drastic succession of wet and dry seasons which periodically affected the region. The mean concentration of suspended sediments was 63,1 mg.l-1 and 206,3 mg.l-1 in flood and low water periods, respectively. Bed sediments were relatively homogeneous along all the hidrological eyele. Silt-sandy bottoms were the predominant, followed then by sand-silty and silt-clayey bottom types. Sediment transport was mainly carried out in acelerated flow suspensión, overcoming the erosion critical velocity. In flood period, some morphometric parameters overcome the 70% in relation with the values recorded in low water. Besides, different elements of diagnostic value for the evaluation of natural or antropical erosión, are also discussed. Some sedimentological aspects of fluvial environments situated in the flood-plain of the Paraguay-Paraná river system (Northeastern of Argentina) were analized. The concentrations of suspended sediments, and the granulometric and textural characteristics of the bottom materials, were compared. The suspended load had an inverse relation with the hydrometric levels with exception of the highly saline streams (conductivity values between 4300 and 11000 uS.cm-1) showing the drastic succession of wet and dry seasons which periodically affected the region. The mean concentration of suspended sediments was 63,1 mg.l-1 and 206,3 mg.l-1 in flood and low water periods, respectively. Bed sediments were relatively homogeneous along all the hidrological eyele. Silt-sandy bottoms were the predominant, followed then by sand-silty and silt-clayey bottom types. Sediment transport was mainly carried out in acelerated flow suspensión, overcoming the erosion critical velocity. In flood period, some morphometric parameters overcome the 70% in relation with the values recorded in low water. Besides, different elements of diagnostic value for the evaluation of natural or antropical erosión, are also discussed. Centro de Ecología Aplicada del Litoral (Consejo Nacional de Investigaciones Científicas y Técnicas - Universidad Nacional de Nordeste) 2023-12-06 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Artículo revisado por pares application/pdf https://revistas.unne.edu.ar/index.php/sub/article/view/7170 Ambiente Subtropical; Núm. 1 (1986): AMBIENTES ANEGABLES DEL CHACO ORIENTAL Primera parte; 60-72 spa https://revistas.unne.edu.ar/index.php/sub/article/view/7170/6605
institution Universidad Nacional del Nordeste
institution_str I-48
repository_str R-154
container_title_str Revistas UNNE - Universidad Nacional del Noroeste (UNNE)
language Español
format Artículo revista
author Orfeo, Oscar
spellingShingle Orfeo, Oscar
Sedimentological study of the fluvial environments from the Eastern Chaco
author_facet Orfeo, Oscar
author_sort Orfeo, Oscar
title Sedimentological study of the fluvial environments from the Eastern Chaco
title_short Sedimentological study of the fluvial environments from the Eastern Chaco
title_full Sedimentological study of the fluvial environments from the Eastern Chaco
title_fullStr Sedimentological study of the fluvial environments from the Eastern Chaco
title_full_unstemmed Sedimentological study of the fluvial environments from the Eastern Chaco
title_sort sedimentological study of the fluvial environments from the eastern chaco
description Some sedimentological aspects of fluvial environments situated in the flood-plain of the Paraguay-Paraná river system (Northeastern of Argentina) were analized. The concentrations of suspended sediments, and the granulometric and textural characteristics of the bottom materials, were compared. The suspended load had an inverse relation with the hydrometric levels with exception of the highly saline streams (conductivity values between 4300 and 11000 uS.cm-1) showing the drastic succession of wet and dry seasons which periodically affected the region. The mean concentration of suspended sediments was 63,1 mg.l-1 and 206,3 mg.l-1 in flood and low water periods, respectively. Bed sediments were relatively homogeneous along all the hidrological eyele. Silt-sandy bottoms were the predominant, followed then by sand-silty and silt-clayey bottom types. Sediment transport was mainly carried out in acelerated flow suspensión, overcoming the erosion critical velocity. In flood period, some morphometric parameters overcome the 70% in relation with the values recorded in low water. Besides, different elements of diagnostic value for the evaluation of natural or antropical erosión, are also discussed.
publisher Centro de Ecología Aplicada del Litoral (Consejo Nacional de Investigaciones Científicas y Técnicas - Universidad Nacional de Nordeste)
publishDate 2023
url https://revistas.unne.edu.ar/index.php/sub/article/view/7170
work_keys_str_mv AT orfeooscar sedimentologicalstudyofthefluvialenvironmentsfromtheeasternchaco
AT orfeooscar estudiosedimentologicodeambientesfluvialesdelchacooriental
first_indexed 2024-08-21T22:39:03Z
last_indexed 2024-08-21T22:39:03Z
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