This conclusion presents some closing thoughts on the concepts covered in the preceding chapters of this book. The book identifies challenges and opportunities for improvement which should be included in future research efforts. It presents a chance to change the approach of flood risk management and to focus on solving several issues simultaneously, achieving multiple benefits. However, drainage systems are considered complex systems, which induce difficulties for decision makers. The book also presents a multi-criteria approach for selecting flood management measures considering the achievement of multiple benefits. The economic analysis of co-benefits can make a significant impact on decision-making, since it enables the cost-effectiveness of investments on Green-blue infrastructure as urban flood risk management infrastructure to be better visualized.