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Sea level variability and its impacts in a NW European lagoon: Ria de Aveiro, Portugal

Sea level variability and its impacts in a NW European lagoon: Ria de Aveiro, Portugal
Sea level variability and its impacts in a NW European lagoon: Ria de Aveiro, Portugal
Sea level variation is a main contributor in controlling the evolution of coastal lagoons as well as determining risks of coastal flooding. This work investigates both long and short-term sea level variability in the Ria de Aveiro, a tide-dominated shallow coastal lagoon located on the western coast of Portugal. The 27 year series of available sea level observations from the permanent tide gauge, at the mouth of the Lagoon, has been analyzed for changes in the different sea level components: tides, surges and mean sea level. The various tidal constituents show interesting local short-term variations in amplitude and phase but no long-term trends. There is no evidence of an increase in weather effects on sea levels and of mean sea level over the period analyzed. Short (1-3 month) sea level data collected during two surveys (1987/8 and 2002/3) in the lagoon are compared. Results show that there has been a significant change in the tidal characteristics of the Lagoon with a general increase in amplitude and decrease in phase for most harmonic constituents.
5pp
PECS (Physics of Estuaries and Coastal Seas)
Araujo, I.
3fb34735-76aa-4b54-ad17-38faf7c79b48
Pugh, D.
ec256ec5-072b-4c4b-8ced-471c277803ff
Dias, J.
68e42ea2-2b30-46bc-b272-5056bea773c4
Araujo, I.
3fb34735-76aa-4b54-ad17-38faf7c79b48
Pugh, D.
ec256ec5-072b-4c4b-8ced-471c277803ff
Dias, J.
68e42ea2-2b30-46bc-b272-5056bea773c4

Araujo, I., Pugh, D. and Dias, J. (2004) Sea level variability and its impacts in a NW European lagoon: Ria de Aveiro, Portugal. In PECS 2004 Proceedings - extended abstracts. PECS (Physics of Estuaries and Coastal Seas). 5pp .

Record type: Conference or Workshop Item (Paper)

Abstract

Sea level variation is a main contributor in controlling the evolution of coastal lagoons as well as determining risks of coastal flooding. This work investigates both long and short-term sea level variability in the Ria de Aveiro, a tide-dominated shallow coastal lagoon located on the western coast of Portugal. The 27 year series of available sea level observations from the permanent tide gauge, at the mouth of the Lagoon, has been analyzed for changes in the different sea level components: tides, surges and mean sea level. The various tidal constituents show interesting local short-term variations in amplitude and phase but no long-term trends. There is no evidence of an increase in weather effects on sea levels and of mean sea level over the period analyzed. Short (1-3 month) sea level data collected during two surveys (1987/8 and 2002/3) in the lagoon are compared. Results show that there has been a significant change in the tidal characteristics of the Lagoon with a general increase in amplitude and decrease in phase for most harmonic constituents.

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More information

Published date: 2004
Venue - Dates: PECS 2004, Merida, Mexico, 2004-10-19 - 2004-10-22

Identifiers

Local EPrints ID: 44357
URI: http://eprints.soton.ac.uk/id/eprint/44357
PURE UUID: ffde85e0-54d2-47ab-a579-297852ae5c40

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Date deposited: 28 Feb 2007
Last modified: 15 Mar 2024 09:03

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Contributors

Author: I. Araujo
Author: D. Pugh
Author: J. Dias

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