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Coastal infrastructure operativity against flooding - A methodology.

Cristobal Rodriguez-Delgado1, Rafael J Bergillos2, Gregorio Iglesias3

  • 1School of Engineering, University of Plymouth, Plymouth PL4 8AA, UK; PROES Consultores, S.A. Virgilio Street 2, Building 3, Pozuelo de Alarcón 28223, Madrid, Spain.

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Coastal structures protect transport and urban areas from flooding. This study introduces a validated methodology using statistics, lab tests, and models to assess infrastructure operability under wave overtopping, crucial for coastal resilience.

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Coastal floodingLaboratory experimentsNumerical modellingOperationalitySeawallStatistics

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Area of Science:

  • Coastal engineering
  • Hydraulics
  • Risk assessment

Background:

  • Coastal infrastructure operability is threatened by flooding and wave overtopping.
  • Previous assessments often lack comprehensive validation and integration of diverse methods.

Purpose of the Study:

  • To present a novel methodology for assessing the operational conditions of coastal infrastructures.
  • To quantify the impact of wave overtopping on infrastructure functionality.
  • To provide a tool for evaluating coastal defense performance under various marine conditions.

Main Methods:

  • Integration of advanced statistical techniques.
  • Conducting laboratory experiments.
  • Utilizing validated, state-of-the-art numerical models.
  • Application to the Dawlish railway seawall case study.

Main Results:

  • An 'effective overtopping forcing' variable was defined, explaining 98% of overtopping discharge variability.
  • Return periods for operational thresholds of coastal structures were determined.
  • The methodology accurately predicts overtopping discharge for given sea states.

Conclusions:

  • The proposed methodology offers a robust assessment of coastal infrastructure operability.
  • It enables proactive identification of risks and potential failures.
  • This approach is vital for enhancing the resilience of coastal communities and transport networks.