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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