**Chiara Favaretto \*, Luca Martinelli and Piero Ruol**

ICEA Department, Padua University, v. Ognissanti 39, 35129 Padova, Italy; luca.martinelli@unipd.it (L.M.); piero.ruol@unipd.it (P.R.)

**\*** Correspondence: chiara.favaretto@dicea.unipd.it; Tel.: +39-049-827-7995

Received: 19 November 2018; Accepted: 21 December 2018; Published: 13 January 2019

**Abstract:** In recent years, marine flooding and its impacts have become a question of growing interest, since coastal areas are the most heavily populated and developed land zones in the world. This paper presents a rapid tool for mapping at regional scale the hazard associated with coastal flooding due to overflow. The tool merges a recently developed numerical model that solves a simplified form of the Shallow-Water Equations and is suited for Graphic Processing Unit (GPU) acceleration, with a Level II reliability method that allows producing hazard maps of inland flooding propagation. The procedure was applied to two stretches of the Venetian littoral, i.e., Valle Vecchia and Caorle, located in the northern Adriatic Sea. The application includes the site descriptions and the resulting hazard maps that show the probability of failure in each point of the coast for a given inland inundation level.

**Keywords:** marine inundation; FORM; reliability analysis; Veneto coast
