doctoralThesis
Monitoramento ambiental da costa do Rio Grande do Norte com base em sensoriamento remoto e geodésia de precisão
Fecha
2013-09-16Registro en:
FERREIRA, Anderson Targino da Silva. Monitoramento ambiental da costa do Rio Grande do Norte com base em sensoriamento remoto e geodésia de precisão. 2013. 210 f. Tese (Doutorado em Geodinâmica; Geofísica) - Universidade Federal do Rio Grande do Norte, Natal, 2013.
Autor
Ferreira, Anderson Targino da Silva
Resumen
This paper presents models of parameters of Sea Surface Layer (SSL), such as
chlorophyll-a, sea surface temperature (SST), Primary Productivity (PP) and Total
Suspended Matter (TSM) for the region adjacent to the continental shelf of Rio Grande
do Norte (RN), Brazil. Concentrations of these parameters measured in situ were
compared in time quasi-synchronous with images AQUA-MODIS between the years 2003
to 2011. Determination coefficients between samples in situ and bands reflectance sensor
AQUA-MODIS were representative. From that, concentrations of SSL parameters were
acquired for the continental shelf of the RN (eastern and northern) analyzing the
geographic distribution of variation of these parameters between the years 2009-2012.
Geographical and seasonal variations mainly influenced by global climate phenomena
such as El Niño and La Niña, were found through the analysis of AQUA-MODIS images
by Principal Components Analysis (PCA). Images show qualitatively the variance and
availability of TSM in the regions, as well as their relationship with coastal erosion
hotspots, monitored along the coast of the RN. In one of the areas identified as being of
limited availability of TSM, we developed a methodology for assessment and evaluation
of Digital Elevation Models (DEM) of beach surfaces (emerged and submerged sections)
from the integration of topographic and bathymetric data measured in situ and
accurately georeferenced compatible to studies of geomorphology and coastal dynamics
of short duration. The methodology consisted of surveys with GNSS positioning operated
in cinematic relative mode involved in topographic and bathymetric executed in relation
to the stations of the geodetic network of the study area, which provided geodetic link to
the Brazilian Geodetic System (GBS), univocal , fixed, and relatively stable over time. In
this study Ponta Negra Beach, Natal / RN, was identified as a region with low variance
and availability of MPS in the region off, as characterized by intense human occupation
and intense coastal erosion in recent decades, which presents potential of the proposed
methodology for accuracy and productivity, and the progress achieved in relation to the
classical methods of surveying beach profiles