ANÁLISE DA INCERTEZA DO MAPEAMENTO BATIMÉTRICO DO CANAL DE NAVEGAÇÃO DO PORTO DO MUCURIPE (CE) – BRASIL (uncertainty analysis of bathymetric mapping of the navigation Channel in Mucuripe harbor (CE) -
Abstract
A atividade portuária representa uma importante fonte de geração de renda e divisas, sendo considerada como a chave para o desenvolvimento sócio-econômico regional. Assim, faz-se necessário o constante monitoramento dos canais de navegação, uma vez que a boa manutenção das cotas batimétricas, contribui diretamente para a segurança no tráfego de embarcações. Para isso, são normalmente realizadas dragagens em áreas adjacentes às instalações portuárias. Nesse âmbito, o levantamento batimétrico é a metodologia mais adequada para o monitoramento dos canais de navegação após a dragagem. Apesar de sua relevância, há pouca discussão sobre a análise da precisão dos mapas batimétricos obtidos. Neste contexto, o avanço recente das técnicas computacionais aplicadas a navegação costeira, pode facilitar a verificação de possíveis incertezas no mapeamento. Assim, este estudo buscou contribuir para a melhoria das técnicas de análise batimétrica com base na geração de um mapa de incerteza através de análise geoestatística. Os resultados demonstram a viabilidade e conveniência de implementação de técnicas de krigagem por indicação, permitindo a análise da incerteza decorrente da interpolação comum (krigagem universal).
Palavras-chave: Navegação, Geoprocessamento, Gestão Portuária.
ABSTRACT
The
harbor activity represents an important source of income generation and
foreign exchange is regarded as the key to regional socio-economic
development. So, it is necessary the constant monitoring of the
navigation channels, since the good state of repair, directly
contributes to safety in boat traffic. For this, are usually carried out
dredging in areas adjacent to port facilities, and the bathymetric
survey the most appropriate methodology for monitoring the depths after
the dredging. However, there is little discussion regarding the analysis
of the accuracy of the bathymetry maps. In this context, the recent
advancement of computational techniques applied, can facilitate the
achievement of a detailed study to ascertain potential areas of
uncertainty in a survey previously conducted. Thus, this study sought to
contribute to the improvement of bathymetry techniques based on
geostatistics from the generation of a map of uncertainty, seeking
review of the accuracy of surveys in harbor zones.The results show the
feasibility and advisability of implementing techniques of indicator
kriging by allowing the analysis of the uncertainties arising from the
ordinary interpolation.
Key words: Navigation, Geoprocessing, Port Management.
RÉSUMÉ
L’activité
portuaire représente une importante source de génération de revenus et
de devises, étant considéré comme la clé de développement
socio-économique. Ainsi, il est nécessaire fair la surveillance
constante des chenaux de navigation, depuis le maintien de bonnes
profondeur bathymétriques, contribue directement avec la sécurité du
trafic maritime. Pour ce faire, le dragage est généralement effectuée
dans les zones aux installations portuaires. Dans ce contexte, la
bathymétrie c’est le méthode plus appropriée pour la surveillance des
chenaux de navigation après le dragage. Malgré sa pertinence, il n’ya
pas études de l’analyse de l’exactitude des cartes bathymétriques
obtenues. Dans ce contexte, le développement récent de techniques de
calcul appliquées à la navigation, peut faciliter la vérification des
incertitudes possibles dans la cartographie. Ainsi, cette étude a
cherché à contribuer à l’amélioration des techniques d’analyse basées
sur la génération d’une carte bathymétrique de l’incertitude par
l’analyse géostatistique. Les résultats démontrent la faisabilité et
l’opportunité de la mise en œuvre des techniques de krigeage indication,
permettant l’analyse de l’incertitude due à l’interpolation commune
(krigeage universel).
Mots-clés: Navigation, SIG, Gestion Portuaire.
DOI: 10.4215/RM2012.1125.0013
Keywords
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