ABSTRACT
Flooding in coastal river reaches is the result of complex spatio-temporal interactions between coastal and inland sources (rainfall, river discharge, storm surge, etc.). This work presents a methodology to explore the individual role of each source in the extreme water levels and to evaluate climate-driven changes in flood hazard integrating all source contributions. It relies on the long-term continuous simulation of along-river water levels from synthetic series of the flood sources, using a surrogate model of the 2D shallow water equations. It is applied to a coastal river reach in Northwest Spain, where it was possible to define the extension of the sea influence, and to confirm and quantify the significant contribution of the sea-level rise to future flood hazard in the river mouth.
