Decision systems for nature based solutions to mitigate floods

In the 20th century often the solution to mitigate floods was putting a corset of reinforced concrete to rivers. An example is one of the case studies in our project which we will detail, the Vidraru dam on Arges river, where a neighbourhood was built after the 1940 floods. In the 21st century however the approach is different. Several years ago a communication session was dedicated to achieving more flood resilience through floodplains on the Danube, and also several years ago a doctorate was concluded on landscape architecture solutions to mitigate floods on the Rhine. The geographic areas are different, and so are the localities and the early 20th century constructions which might be affected by floods and their relationship to the city - ex. peripheral Siedlung in Germany. Today one can look more systematically. A recent course of the European Commission offered insights to natural disaster mitigation through nature based solutions across the globe. We also reviewed literature in a nice part of this: decision systems to prioritise interventions based on cost-benefit to mitigate floods. On this basis, identifying gaps - the papers cover some of the aspects of this issue at once, not all of them - we elaborated a decision tree and its taxonomy according to criteria related to the building and the river landscape. The indices to quantify these criteria will be shown. This will be exemplified in case studies comprising Bucharest, Rome and Lisbon. It can be converted into an ontology for software planning, as in numerous European projects related to protection of architectural and archaeological heritage protected from climate change with IT support which go even further, towards Internet of Things. The context of future possible projects will be shown in the discussion.