The memory of water. Hydrosocial fragility and urbanisation in Cagliari. – In Italy, the modern abstraction of human beings from the environment has led to a strict technicist management of natural resources and to a clear separation between urban and social policies, not entirely overcome by the National Recovery and Resilience Plan (PNRR). In particular, urban strategies struggle to reason about the role of water in the territorial system, relegating it to technical risk management interventions. From the debate around the mesological approach, various declinations of the relationship between human presence and water outline an often-chaotic palimpsest of plans and visions of urban space.
The contribution addresses the case study of the Cagliari municipality of Pirri, in the relationship between the historical condition of hydrogeological and social fragility and the new urban strategies to contrast risk. This systemisation is possible by adopting a reading of Pirri as a hydro-social territory, which allows us to critically reconstruct the history of the hydro-social fragility of this territory and consequently to re-read past and future planning policies.

Urban Interstices as Spaces of Possibility. Urban Explorations and Everyday Prac-tices around the SS 554 «Cagliaritana». – In this paper, I explore the hypothesis that the interstices around urban motorways could be intended as spaces of creative, political, and performative experimentation outside planning and market logic. Urban interstices can be thought of as the negative of the city and part of a counter-utilitarian discourse, leading to great flexibility in the production of different urban forms.
Re-interpreting Gibson-Graham’s politics of possibility I re-read urban interstices around motorways as spaces of possibility, in which other spa-tial forms and dynamics are made visible, conceivable, and thus possible. In the literature on interstices, the emphasis on spatial possibilities is pre-sent but never posed in Gibson-Graham’s feminist, performative, and transformative terms.
The reading of urban interstices as spaces of possibility arises from the exploration of the interstices around the SS 554 “Cagliaritana”. In partic-ular, I will provide an understanding of the informal practices taking place in it as non-conflictual political claims towards a different way of producing urban space, that makes the interstices spaces of possibility.