Sustainability Assessment of Urban Water Use from Building to Urban Scale in the GST4Water Project

The present paper illustrates some of results obtained in the GST4Water project concerning the development of appropriate metrics, methods and tools for the assessment of economic and environmental sustainability of urban water systems at different scales for a variety of stakeholders. At the household scale and based on data and algorithms to represent residential water demand, we reconstruct the behavior of domestic users and develop a suite of indicators accounting for consumption performances and sustainability, and a software tool geared at the needs of water consumers. Considering multiple scales ranging from household to urban, we develop a model based on urban metabolism, able to evaluate several performance indicators for both sustainability assessment and benchmark, comparing the impact of different management options for water demand and reuse.