Toward the sustainable management of urban storm-water

Despite the development of urban drainage systems over the past 5000 years, there are still many challenges to their effective use. There are growing demands with respect to runoff quantity and quality, visual amenity (landscape aesthetics), protection of ecology and beneficial water uses and interaction with the operation of existing municipal wastewater systems. Current solutions that rely mainly on pipe networks may not be sustainable, especially in developing countries. By considering the driving forces in action during the first years of the 21st century, different scenarios for the future use and development of urban drainage systems can be propose; a of them rather pessimistic. The implementation of the sustainable management of urban water will require an integrated approach to all the related problems, including the better delivery of urban drainage services.