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Revealing representation mismatch through role playing games: Example of peri-urban catchment management in Sao Paulo (Brazil)

Ducrot R., Barban V.. 2008. In : IWRA. 13 ème congrès mondial de l'eau, Montpellier, 1-4 septembre 2008. Montpellier : IWRA, 1 p.. Congrès mondial de l'eau. 13, 2008-09-01/2008-09-04, Montpellier (France).

In spite of the implementation since the 70's of various legislation to control urbanization in the headwater catchment of the Metropolitan Region of Sao Paulo (Brazil), illegal settlements without sanitation infrastructure have continued to spread. This expansion has led to a rapid degradation of water quality in the main water drinking reservoirs that provides 50 % of the domestic water supply of the city. In the last decade, the development of a new water governance framework based on the principles of integrated water management has strengthen the need for discussion between the different stakeholders and levels of management. But the efficiency of the legislation is undermined by functional difficulties faced by the committees. Their role as discussion platforms is weakened by important asymmetries in power and access to information between a fragmented and poorly represented civil society, powerful actors such as the water firm and the biggest municipalities, and the short-term electoral strategies of many municipalities. This contribution aims to discuss how the role of computerized role playing games to highlight how different are the preoccupation of actors representing the center and institutional sphere actively participating in the catchment committees and the local stakeholders, and the consequences of this discrepancies for development of sustainable solutions for the preservation of the headwater catchment. The role playing game Ter'Aguas, developed using a companion modelling approach has integrated the representations of local actors as well as institutional ones. It allows simulating the negotiations related to local planning including land and water infrastructure planning involving different actors. Players take decision concerning land market, land occupation and land use changes, as well as the development of urban infrastructures, taking into account social and economic factors. The simulated negotiations take place in the context of a legisla

Mots-clés : gestion des eaux; méthodologie; sao paulo; jeu de role; modélisation d'accompagnement; système multiagents

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