Page 35 - GENERACION Y TRANSPORTE DE SEDIMENTOS

Generación y Transporte de Sedimentos 35

viological area. In particular, the filling of the bed and the two-dimensional model applied to the de-
is produced due to deposition of silt at the bottom velopment of the Bermejo River meanders in Puer-
of the estuary, and the formation of silt material to Lavalle, among others.
banks in the front of the Delta. Using the developments made on the issue of
The materials dredged in navigation channels sediment production, and given the importance of
are almost exclusively limos. In order to change to such issue, an analysis of the change in the rate of
weight, the density considered was 1350kg/m . In sediment production in the Upper Basin has been
3
the Middle Rio de la Plata, there is a balance be- made, before contingent changes in the climate
tween incoming and outgoing sediment. Conse- variable.
quently there are no major fluviomorphological We know that climate scenarios are represen-
changes in this area. tations about future climate based on assumptions
As regards the Outer Rio de la Plata, we have about emissions of greenhouse gases (GHG) and
the so called Barra del Indio. This is an elevated other pollutants with and the scientific knowledge
bed in the outer mouth of the Río de la Plata, about the effect that the increase concentrations
which occurs due to brackish water sedimentation of these gases will have on global climate. There-
of the finest particles from the wash load from de fore, they describe how the Earth's climate will
Paraná River. change as a result of altering the composition of
the atmosphere as a result of human activities. The
Replication of studies of the Bermejo River in del results of global climate models were used to ob-
Plata Basin tain the patterns of isohietas and isotherms in the
Upper Basin, for the scenarios available. To quan-
Within the framework of the replicability actions tify changes in sediment production, the Gavrilovic
of SAP Bermejo, the methodological approaches method was used.
were analyzed in a regional context, assessing the We conclude that, indeed, any future climate
use and applicability of the studies conducted for changes in precipitation and temperature variables
Bermejo in the broader Plata River Basin. The anal- affect the production of surface sediments from
ysis showed that the studies of sediment produc- water erosion in the Upper Bermejo River Basin.
tion in the Upper Basin can be replicated in various We should also analyze, besides the changed in
parts of the La Plata Basin, which were identified. precipitation and temperature, how changes in cli-
It should be noted that the La Plata Basin covers matic variables can affect other factors of impor-
a large area, which complicates the extrapolation tance in determining sediment production, such as
techniques generated in bounded areas. However vegetation cover, for example. Changes in climatic
the results are satisfactory. Other products, that variables can drastically affect these parameters
are, a priori, replicable, are the one-dimensional and, consequently, the values of sediment produc-
morphological model of the Lower Bermejo River tion will be affected.