Sea-tide effects on flows in the lower reaches of the Amazon River

The physical influence of sea tides on the lower reaches of the Amazon River can be identified more than 1000 km upstream from the sea. Analysis of upstream tidal wave propagation on the Amazon River contributes to the understanding of the hydrodynamics of the lower reaches and to the quantification...

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Veröffentlicht in:Hydrological processes 2009-10, Vol.23 (22), p.3141-3150
Hauptverfasser: Kosuth, Pascal, Callède, Jacques, Laraque, Alain, Filizola, Naziano, Guyot, Jean Loup, Seyler, Patrick, Fritsch, Jean Marie, Guimarães, Valdemar
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container_issue 22
container_start_page 3141
container_title Hydrological processes
container_volume 23
creator Kosuth, Pascal
Callède, Jacques
Laraque, Alain
Filizola, Naziano
Guyot, Jean Loup
Seyler, Patrick
Fritsch, Jean Marie
Guimarães, Valdemar
description The physical influence of sea tides on the lower reaches of the Amazon River can be identified more than 1000 km upstream from the sea. Analysis of upstream tidal wave propagation on the Amazon River contributes to the understanding of the hydrodynamics of the lower reaches and to the quantification of the influence of sea level on sedimentation rates. Continuous over-the-year recording of water levels has been undertaken at eight locations along the lower reaches of the Amazon River and flow measurement campaigns have been organized for different river discharge rates (100 000 m³ s⁻¹, 190 000 m³ s⁻¹ and 250 000 m³ s⁻¹) and sea-tide amplitudes (2-3·5 m). Damping, time-delay and deformation of the tidal wave signals, depending on water regimes and distances from the sea, have been analyzed. The physical processes of wave propagation and cyclic water storage and release have been investigated both through data analysis and the application of mathematical hydrodynamic models. The impact of tidal pulses on sediment transport to the sea has been assessed. Copyright © 2009 John Wiley & Sons, Ltd.
doi_str_mv 10.1002/hyp.7387
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subjects Amazon River
Brazil
Environmental Sciences
Freshwater
hydrodynamics
hydrology
mathematical models
rivers
sea level
sediment deposition
sediment transport
stream flow
tidal effects
tides
title Sea-tide effects on flows in the lower reaches of the Amazon River
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