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Temporal shoreline series analysis using GNSS

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Open access
Authors
Mendonca, F.
Gonçalves, R.
Awange, Joseph
Da Silver, L.
Gregorio, M.
Date
2014
Type
Journal Article

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Mendonca, F. and Gonçalves, R. and Awange, J. and Da Silver, L. and Gregorio, M. 2014. Temporal shoreline series analysis using GNSS. Boletim de Ciências Geodésicas. 20 (1): pp. 711-729.
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Boletim de Ciências Geodésicas
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Department of Spatial Sciences
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This article is published under the Open Access publishing model and distributed under the terms of the Creative Commons License http://creativecommons.org/licenses/by/nc/3.0/ Please refer to the licence to obtain terms for any further reuse or distribution of this work

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Abstract

In recent decades, Boa Viagem beach located in the city of Recife-PE and Piedade in Jaboatão dos Guararapes-PE (Brazil) has seen urbanization near the coastline causing changes in social, economic and morphological aspects, where coastal erosion problems are observed. This study uses GNSS (global navigation satellite system) shoreline monitoring approach, which is quicker, and provides continuously updatable data at cm-level accuracy to analyze and determine temporal positional shifts of the shoreline as well as annual average rates through EPR (end point rate). To achieve this, kinematic GNSS survey data for the years 2007, 2009, 2010 and 2012 were used. The results show sectorial trends over the years, with the highest annual retreat rate of 8.16 m /year occurring during the period 2007-2009. Variety of different patterns over the shoreline were also observed. These findings could be essential for decision making in coastal environments.