Circular Water Management in Public Space—Experimental Feasibility Studies in Different Urban Contexts

Abstract

Several studies highlight the risks related to the growing water crisis, worsened by the effects of pollution, which increasingly make water sources non-potable. The current water-sensitive urban design (WSUD) approach improves resource efficiency and implements urban livability by combining natural water flows with all the scales of the urban landscape. The logistic and operational management of water disposal/treatment and distribution requires performing service design according to cities’ physical and morphological features, starting from their architectural and landscape characteristics. This paper aims to prove that different landscapes can offer different inspirations and possibilities to imagine a WSUD-coherent system, fulfilling the integration requirements with the urban system. For this purpose, three case studies, differing by dimension, morphology, and urban typology, are analyzed, experimenting with circular water usage with no resource waste. This research proposes concrete actions such as conservation, restoration or addition of permeable surfaces, the installation of new accumulation and treatment systems, and the use of water-saving devices. Starting from redesigning the water system, they can also include punctual redevelopment interventions on the urban built environments and opportunities for network development with public administrations, private businesses, third-sector organizations, and end users. This experimentation has led to water savings of up to 80% of the current consumption scenario.