A coupled surface-subsurface hydrologic model to assess groundwater flood risk spatially and temporallyA coupled surface-subsurface hydrologic model to assess groundwater flood risk spatially and temporally Peer-Reviewed Journal Publication Δημοσίευση σε Περιοδικό με Κριτές 2020-06-232019enFloods introduced by rainfall events are responsible for tremendous economic and property losses. It is important to delineate flood prone areas to minimize flood damages and make mitigation plans. Recently, there has been recognition of the need to understand the risk from groundwater flooding caused by the emergence of groundwater at the ground surface. Mapping groundwater flood risk is more challenging compared to river flooding, especially in karst systems, where subsurface preferential flowpaths can affect groundwater flow. We developed a coupled surface-subsurface modelling framework resolving spatial information and hydrologic data to assess the groundwater flood risk at a karstic watershed: Koiliaris River Basin, Greece. The simulated groundwater table was used to delineate groundwater flooding. Modelled results revealed the role of faults in groundwater flooding generation. We anticipate the coupled surface-subsurface approach to be a starting point for more sophisticated flooding risk assessment, including magnitude and temporal duration of groundwater flooding.http://creativecommons.org/licenses/by/4.0/Environmental Modelling and Software114129-139 Yu Xuan Moraitis Daniil Μωραϊτης Δανιηλ Nikolaidis Nikolaos Νικολαιδης Νικολαος Li Bailing Duffy Chistopher J. Liu Bingjun Elsevier Coupled surface-subsurface model Critical zone observatory Groundwater flooding Koiliaris river basin PIHM Risk assessment