Caracterização batimétrica e fisicooceanográfica do canal de acesso ao porto de Cabedelo/PB: uma análise ambiental ao derrame de óleo
The State of Paraíba is one of the most dynamic states of Brazil, strategically located in the northeast, is notable for the excellent potential for integration of different transportation modes forming the states of Rio Grande do Norte, Pernambuco and Alagoas. The dynamic that occurs with port a...
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Formato: | Dissertação |
Idioma: | por |
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Universidade Federal do Rio Grande do Norte
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Endereço do item: | https://repositorio.ufrn.br/jspui/handle/123456789/12946 |
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Resumo: | The State of Paraíba is one of the most dynamic states of Brazil, strategically located
in the northeast, is notable for the excellent potential for integration of different transportation
modes forming the states of Rio Grande do Norte, Pernambuco and Alagoas. The dynamic
that occurs with port activity causes changes in the space where it is installed. And the
elements of this space are always more than suffering direct or indirect influences as the flow
in the port is expanded. Therefore, this region became subject to the accidental spillage of oil,
because it presents a heavy traffic of ships of various sizes that can run aground or collide
with oil causing accidental events. The study of geomorphological and sedimentological
compositions of seafloor becomes important as more is known about the relationships
between these parameters and associated fauna, and can identify their preferred habitats. The
database background, acoustically collected along the proposed study area, is a wealth of
information, which were duly examined, cataloged and made available. Such information can
serve as an important tool, providing a geomorphological survey of the sedimentary area
studied, and come to subsidize, in a flexible, future decision making. With the study area Port
of Cabedelo, Paraíba - Brazil, this research aimed to evaluate the influence of the tidal surface
and background in modeling the seabed, including the acquisition of information about the
location of submerged rocky bodies and the depth of these bodies may turn out to be natural
traps for the trapping of oil in case of leaks, and obtain the relationship between types of bed
and the hydrodynamic conditions present in the region. In this context, for this study were
collected bathymetric data (depth) and physical oceanographic (height of water column, water
temperature, intensity and direction of currents, waves and turbidity), meteorological (rainfall,
air temperature, humidity, winds and barometric pressure) of the access channel to the Port of
Cabedelo / PB and its basin evolution (where the cruise ships dock), and includes tools of
remote sensing (Landsat 7 ETM +, 2001), so that images and the results are integrated into
Geographic Information Systems and used in the elaboration of measures aimed at
environmental protection areas under the influence of this scale facilities, serving as a grant to
prepare a contingency plan in case of oil spills in the region. The main findings highlight the
techniques of using hydroacoustic data acquisition together bathymetric surveys of high and
low frequency. From there, five were prepared in bathymetric pattern of Directorate of
Hydrography and Navigation - DHN, with the depth in meters, on a scale of 1:2500 (Channel
and Basin Evolution of Access to Port of Cabedelo), where there is a large extent possible
beachrocks that hinder the movement of vessels in the port area, which can cause collisions,
running aground and leaking oil. From the scatter diagram of the vectors of currents, it can be
seen as the tidal stream and undergoes a channeling effect caused by the bidirectional effect of
the tide (ebb and flood) in the basin of the Port of Cabedelo evolution in NW-direction SE and
the highest speed of the currents occurs at low tide. The characterization weather for the
period from 28/02 to 04/07/2010 values was within the expected average for the region of
study. The multidisciplinary integration of products (digital maps and remote sensing images),
proved to be efficient for the characterization of underwater geomorphological study area,
reaching the aim to discriminate and enhance submerged structures, previously not visible in
the images |
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