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A new and practical method to obtain grain size measurements in sandy shores based
Baptista, Paulo; Cunha, Telmo; Gama, Cristina; Bernardes, CristinaModern methods for the automated evaluation of sediment size in sandy shores relay on digital image processing algorithms as an alternative to time-consuming traditional sieving methodologies. However, the requirements necessary to guarantee that the considered image processing algorithm has a good grain identification success rate impose the need for dedicated hardware setups to capture the sand surface images...
METODOLOGIA INOVADORA PARA MONITORIZAÇÃO DA EROSÃO COSTEIRA
Baptista, Paulo; Cunha, Telmo; Bernardes, Cristina; Gama, CristinaO desenvolvimento de metodologias de monitorização inovadoras, aplicáveis a escalas espaciais da ordem das dezenas de quilómetros, que se caracterizem pela sua eficiência e precisão, a custos relativamente baixos, e que permitam: (i) quantificar volumes sedimentares, (ii) determinar valores de recuo de linha de costa, (iii) avaliar a morfologia da praia sub-aérea e (iv) determinar a granulometria de sedimentos,...
A Precise and Efficient Methodology to Analyse the
Baptista, Paulo; Cunha, Telmo; Bernardes, Cristina; Gama, Cristina; Ferreira, Oscar; Dias, AlveirinhoThe shoreline change rate is one of the most significant parameters in analysing sandy shore behaviour with time. This parameter can be monitored by means of low- and high-resolution survey methods, depending on the objectives of the monitoring programme. Survey efficiency is also very important for achieving high resolution in both space and time. Another important aspect is the precision and significance of t...
New land-based method for surveying sandy shores
Baptista, Paulo; Cunha, Telmo; Matias, Ana; Gama, Cristina; Bernardes, Cristina; Ferreira, ÓscarThe INSHORE system (INtegrated System for High Operational REsolution in shore monitoring) is a land-base survey system designed and developed for the specific task of monitoring the evolution in time of sandy shores. This system was developed with two main objectives: (1) to produce highly accurate 3D coordinates of surface points (in the order of 0.02 to 0.03 m); and (2) to be extremely efficient in surveying...
DEVELOPMENT OF LOW COST AND HIGH PRECISION PROTOTYPE SYSTEMS FOR MORPHOLOGICAL ...
Baptista, Paulo; Cunha, Telmo; Bernardes, Cristina; Gama, Cristina; Ferreira, ÓscarIn the scope of the INSHORE project (INtegrated System for High Operational REsolution in Shore Monitorisation), a low cost and high efficiency monitoring system is under development, being adequate for sandy shore surveying (from the foreshore to backshore), which integrates two prototype systems for morphological and sedimentary data survey. The first prototype system is a high resolution GPS based system inc...
Methodological approaches to shoreline assessment: short-term analysis of beach...
Baptista, Paulo; Bastos, Luísa; Granja, Helena; Gama, Cristina; Bernardes, CristinaDetermination of accurate short-term coastal erosion rates in sandy shores require special care in what concerns: (1) shoreline indicator field feature definition and identification, (2) technological approach to position the adopted shoreline indicator and methodologies used for data gathering; (3) and computational procedures to measure shoreline retreat between surveying epochs. When all these aspects are co...
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