scholarly journals Interannual variations of river water storage from a multiple satellite approach: A case study for the Rio Negro River basin

2008 ◽  
Vol 113 (D21) ◽  
Author(s):  
Frédéric Frappart ◽  
Fabrice Papa ◽  
James S. Famiglietti ◽  
Catherine Prigent ◽  
William B. Rossow ◽  
...  
Keyword(s):  
River Water ◽  
River Basin ◽  
Water Storage ◽  
Interannual Variations ◽  
Negro River ◽  
Rio Negro

scholarly journals River water quality assessment using environmentric techniques: case study of Jakara River Basin

2013 ◽  
Vol 20 (8) ◽  
pp. 5630-5644 ◽  
Author(s):  
Adamu Mustapha ◽  
Ahmad Zaharin Aris ◽  
Hafizan Juahir ◽  
Mohammad Firuz Ramli ◽  
Nura Umar Kura
Keyword(s):  
Water Quality ◽  
Quality Assessment ◽  
River Water ◽  
River Basin ◽  
Water Quality Assessment ◽  
River Water Quality

scholarly journals Análise Montante-Jusante da Granulometria dos Sedimentos de Fundo e Suspenso do Rio Negro e Tributários (Bacia Amazônica, Brasil)

2021 ◽  
Vol 14 (2) ◽  
pp. 997
Author(s):  
Rogério Ribeiro Marinho ◽  
Antonio Fábio Sabbá Guimarães Vieira ◽  
Feliciano De Souza Maciel
Keyword(s):  
Sediment Transport ◽  
River Basin ◽  
Amazon Basin ◽  
Suspended Sediments ◽  
Fine Sand ◽  
Large River ◽  
Coarse Sand ◽  
Sediment Size ◽  
Negro River ◽  
Rio Negro

O conhecimento das características físicas de sedimentos transportados por grandes sistemas fluviais possui significativa importância para o entendimento de processos geomorfológicos e hidrológicos. O nível de conhecimento dos grandes sistemas fluviais da Amazônia e sua relação com o transporte de sedimentos ainda é limitado, resultando em lacunas de conhecimento sobre a dinâmica da paisagem nesta complexa região. Este trabalho teve como objetivo avaliar a distribuição espacial da granulometria de sedimentos de fundo e suspenso do Rio Negro e tributários. Realizou-se análise da distribuição do tamanho dos sedimentos em seções amostrais localizadas no alto, médio e baixo curso do Rio Negro. Os resultados da análise granulométrica da carga de fundo indicam a predominância de sedimentos com tamanho variando de 0,25 a 1,0 mm (principalmente areia fina, areia média e areia grossa) enquanto no baixo curso as amostram oscilaram de areia fina a partículas lamosas (< 0,50 mm). No Rio Negro os sedimentos suspensos são compostos principalmente de partículas finas de silte (90% menor que 80 µm) com diâmetro mediano (D50) de 25 µm. As características granulométricas apresentadas neste trabalho fornecem subsídios para o entendimento de processos hidrodinâmicos de transporte e deposição dos sedimentos de fundo e suspenso neste gigante sistema fluvial.    Upstream-downstream Granulometry Analysis of bed and suspended sediments in the Negro River Basin (Amazon Basin, Brazil)A B S T R A C TThe knowledge of the physical characteristics of sediments transported by large river systems has significant importance for the understanding of geomorphological and hydrological processes. The level of knowledge of the large rivers of the Amazon basin and their relationship with sediment transport is limited, resulting in gaps about the dynamics of the landscape in this complex region. This article analyzes the spatial distribution of granulometry of bed and suspended sediments in the Negro River and tributaries. An analysis of the sediment size distribution was carried out in sample sections located in the upper, middle and lower reaches of the Negro River. The results of the granulometric analysis of the bed load indicate the predominance of sediments with sizes ranging from 0.25 to 1.0 mm (mainly fine sand, medium sand and coarse sand) while in the low course they showed oscillated from fine sand to muddy particles (<0.50 mm). In the Negro River basin the suspended sediments are composed mainly of fine silt particles (90% less than 80 µm) with a median diameter (D50) of 25 µm. The granulometric characteristics presented in this work provide subsidies for the understanding of hydrodynamic processes of transport and deposition of bed and suspended sediments in this huge fluvial system.Keywords: sediment transport, Amazon floodplain, multichannel river, anabranching

Water Quality Management in the Yodo River Basin – Case Study

1991 ◽  
Vol 23 (1-3) ◽  
pp. 65-74 ◽  
Author(s):  
Takeshi Goda ◽  
Hiroshi Nakanishi
Keyword(s):  
Water Quality ◽  
Drinking Water ◽  
River Water ◽  
River Basin ◽  
Flow Condition ◽  
Sewage Treatment ◽  
Treatment System ◽  
Low Flow ◽  
Sewage Treatment System

This study investigated an appropriate sewage treatment system to be applied in a river basin where river water is re-used repeatedly. Many sewage effluents are discharged into the river's up-streamside from intake points for drinking water. The Yodo river was selected as a case study. The obtained results are as follows; 1) Investigations of COD, NH4-N, THMFP are necessary in polluted rivers used as drinkingwater sources. 2) The effect of a sewage treatment system construction for river water conservation should be evaluated with the predicted water quality in the low flow and the average flow condition. 3) Time and place variations of NH4-N concentration in the Yodo river are predicted by adaptation of a two dimensional unsteady diffusion model. 4) The greater part of TN or NH4-N load deposited at the Yodo river branches in the dry weather condition are washed away by the wet flow condition. 5) It will be possible to maintain the present water quality level for TN and NH4-N in the future, despite an increase of population in the Yodo area and the construction of a conventional sewage treatment system. 6) However, an adaptation of an advanced sewage treatment system is recommended for re-use as drinking water of the Yodo river water.

scholarly journals Floodplain water storage in the Negro River basin estimated from microwave remote sensing of inundation area and water levels

2005 ◽  
Vol 99 (4) ◽  
pp. 387-399 ◽  
Author(s):  
Frédéric Frappart ◽  
Frédérique Seyler ◽  
Jean-Michel Martinez ◽  
Juan G. León ◽  
Anny Cazenave
Keyword(s):  
Remote Sensing ◽  
River Basin ◽  
Water Storage ◽  
Microwave Remote Sensing ◽  
Water Levels ◽  
Negro River ◽  
Inundation Area
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