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| Titel |
Geochemistry of Amazon Basin supported by the ADCP measurements |
| VerfasserIn |
Victor Paca, Daniel Moreira, Achiles Monteiro, Henrique Roig |
| Konferenz |
EGU General Assembly 2014
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 16 (2014) |
| Datensatznummer |
250099818
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| Publikation (Nr.) |
 EGU/EGU2014-15647.pdf |
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| Zusammenfassung |
| The Amazon River is the largest river in the world in volume of water. The basin has
6.915.000 Km2, but the last gauging station of Amazon River with regular and continuous
measurements of discharge and sediment transport are Óbidos station with 4.670.000 Km2.
Óbidos It is also the last stream gauge station with no or less tidal effect observed from
Atlantic Ocean and registered. The Clim-Amazon Project has been done the first
measurements with the purpose to acquire geochemical and hydrological informations
downstream Óbidos station.
The system studied has input data of sediments load after Óbidos, and the output of the
system, at the Amazon River is at Macapá, close to the mouth of Amazon river. And flow the
main tributaries along this way, between these two stations.
To evaluate the geochemical source, the mass balance, and isotopic geochemistry is
necessary the informations about the traces the main chemical elements, transported by the
discharge from the main rivers of this area: Tapajos, Xingu, Paru, Jari, and the Amazon River
at Monte Alegre and at Macapá.
The ADCP – Acoustic Doppler Current Profile, equipment is used to get the stream
discharge value at the moment of transect. But also get two more informations necessary for
the geochemistry, and do the collecting points profiles. The place with most velocity at
transect or the place with more backscatter. These informations are related with the sediment
load of the river. Or which one can provide the better idea of how are transported the
sediments at the measured transects. What was to observe was the main speed of the stream
flow or the main backscatter sectional.
The main purpose of the work is to show how works the correlation between the
backscatter and speed data given by the ADCP, downstream Óbidos, and the main confluences
of Amazon River, until Macapá. The ADCP measurements support the geochemical
studies and the course of sediments load transported by the discharge of these rivers. |
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