Often a complex of small retention measures has the same or a better effect than ‘big’ solutions. ‘Green’ instead of ‘grey’ solutions as well as solutions for multiple purposes have a large number of benefits and are suitable almost everywhere.
Rainwater storage facilities have long term literature in conventional engineering. (valley dams, reservoirs, etc.). These facilities are built as a result of a large investment, with a certain level of safety.
In contrast, grey and green solutions are cheaper, more adaptive to climate change, better suited to an urban environment, and their long-term benefits are indisputable.
Follow the recommendations for the implication of natural water retention measures (NWRM) published on the European NWRM platform (http://nwrm.eu) and act according to the EU strategy on green infrastructure developed by the European Commission in 2019.