Abstract. This paper suggests to reflect on the waterfront in a nontraditional way, referring to theoretical and methodological assumptions, developed in recent years about "Cities from the Sea" by our research group in the National Research Council of Italy. So the first step is to move from cognitive analysis to proposals and projects. We can refer to the positive experience of New York that is a best practice in approach, strategies and results. The key of this success is a synthesis of the metropolitan vision favored by the public government, the activation of stakeholders to get results of common interest, the involvement of local communities. People was informed and motivated to put a position, they were encouraged to participate and to give a significant contribute to the achievement of results.
Urban coastline issuesThe coast, close to the sea, is a sensitive area where the issue of sustainable development shows itself in all its complexity and potentiality. In urban and metropolitan areas, complexity increases as well as potentiality, at environmental, social and economic level. The coastline is a hinge area that is characterized by the biological diversity of two coastal habitats that join: the marine and terrestrial one.At the present day, urban waterfronts are often affected by an high level of pollution, both inside and outside of the harbor. On the mainland, the coastal area is often densely built and it hosts residential and leisure functions as well as industrial settlements that cause a strong ecological footprint. Actually, also in other contexts where production activities are in a decreasing trend, we usually find a strong past pollution burden that makes very hard to recover and to reuse the area.The enhancement of the waterfront must begin under the water to be effective, through the restoration of the marine habitat. At the same time, we must proceed with the clean-up and the remediation on the mainland, if necessary, when the coastal area had been used for industrial purposes.On the social level, the metropolitan waterfront usually offers a good opportunity to realize public spaces that are very suited to facilitate aggregation of people and to improve social cohesion. The view over the sea is very important at psycho-perceptive level, because it opens the mind and promotes the socialization through a good disposition towards the other people. The creation of public spaces close to the sea has always generated positive impacts: promenades, meeting places, public parks and sports places. In addition, terminal and quays are spaces of mediation between port-cities that are connected by the maritime routes of the ships.However, the creation of public spaces could produce concentration of people and of leisure functions so that it became a font of potential congestion on the waterfront. This should be prevented through a metropolitan vision of the urban life and activities, by managing functions, flows and mobility both at the physical level and at the immaterial one.Anyway, the feasibility of...