This document relates to the work carried out within the RAS on Technical Support for the Preparation of Flood Risk Management Plans for Romania Project, also known as the RO - FLOODS Project, and is directed at professionals working in flood risk management and in water resources management in the European Union (EU) and in other regions. It contains chapters dedicated to each key activity of the RAS (e.g., data acquisition and processing, data management, flood hazard modeling and mapping, flood risk assessment and mapping, development of the programs of measures, promotion and inclusion of green infrastructure and nature-based solutions, stakeholder engagement and communication, capacity building etc.) the main challenges faced, the approach chosen to address them, the implementation results, and lessons learned.