masterThesis
Caracterização morfodinâmica do estuário do Rio Açu, Macau/RN
Fecha
2010-02-25Registro en:
ROCHA, Ana Karolina Rodrigues da. Caracterização morfodinâmica do estuário do Rio Açu, Macau/RN. 2010. 85 f. Dissertação (Mestrado em Geodinâmica; Geofísica) - Universidade Federal do Rio Grande do Norte, Natal, 2010.
Autor
Rocha, Ana Karolina Rodrigues da
Resumen
Estuaries are coastal environments ephemeral life in geological time, derived from
the drowning of the shoreline as a function of elevation relative sea level. Such parallel
systems is characterized by having two sources of sediment, the river and the sea. The
study area comprises the Acu River estuary, located on the northern coast of Rio Grande do
Norte State, in a region of intense economic activity, mainly focused on the exploration of
oil onshore and offshore, likely to accidental spills. In the oil sector are developed for salt
production, shrimp farming, agriculture, fisheries and tourism, which by interacting with
sensitive ecosystems, such as estuaries, may alter the natural conditions, thus making it an
area susceptible to contamination is essential in understanding the morphodynamic
variables that occur in this environment to obtain an environmental license. Information
about the submarine relief the estuaries are of great importance for the planning of the
activity of environmental monitoring, development and coastal systems, among others,
allowing an easy management of risk areas, and assist in the creation of thematic maps of
the main aspects of landscape. Morphodynamic studies were performed in this estuary in
different seasonal periods in 2009 to observe and quantify morphological changes that have
occurred and relate these to the hydrodynamic forcing from the river and its interaction
with the tides. Thus, efforts in this area is possible to know the bottom morphology through
records of good quality equipment acquired by high resolution geophysical (side-scan sonar
and profiler current by doppler effect). The combination of these data enabled the
identification of different forms of bed for the winter and summer that were framed in a
lower flow regime and later may have been destroyed or modified forms of generating fund
scheme than the number according Froude, with different characteristics due mainly to the
variation of the depth and type of sedimentary material they are made, and other
hydrodynamic parameters. Thus, these features background regions are printed in the
channel, sandy banks and muddy plains that border the entire area