Multiparameter Flood Risk Assessment and Management Planning at High Spatial Resolution in the Region of Attica, Greece

Floods are disastrous events as they induce fatalities, damages to the environment, properties and infrastructure, at a global level. The Region of Attica, that hosts Athens (capital of Greece), has suffered various floods, including the severe flood in Mandra (2017) with 24 fatalities. In 2021, a Programming Agreement was signed between the Prefecture of Attica and the National Observatory of Athens to conduct the research study «Earthquake, fire and flood risk assessment in the Region of Attica» (Part A) in selected and most vulnerable areas. In the framework of this research and technical work, state-ofthe-art methodologies were developed and implemented that support multi-parameter flood risk assessment and management planning at high spatial resolution (building block level). This work integrates different data sources, including remote sensing, in-situ measurements, field visits, and simulations, and is characterized by considerable added value, as it supports the civil protection authorities as well as all the other relevant stakeholders in the decision-making, first response and management of floods. Furthermore, this innovative approach is transferable, adaptable and scalable, and it is now being implemented in the Garyllis river basin in Cyprus, in the framework of the «EXCELSIOR» H2020 Widespread Teaming project.