Abstract

Urban sustainability is a key issue in our world. The aim of the thesis is to decline this issue in relation to tourist-historic cities, analyzing the impacts of tourism on urban sustainability and defining a set of indicators for sustainability evaluation and monitoring in these cities. The thesis proposes a new classification of tourism impacts in this context identifying three basic ambits, direct tourism impacts, Public Administration Activities impacts and Carrying Capacity impacts, and two city categories, differentiated and undifferentiated cities depending on urban structure and tourism spatial organization. Indicators are used both to classify cities and to identify unsustainable dynamics. The main aspects of direct tourism impact are also aggregate in a tourism unsustainability index, which measures the aggressiveness of tourism towards historic city, according to the previous considerations. Once identified problems, the thesis suggests some possible policies to cope with unsustainable dynamics. In order to validate this new evaluation methodology, indicators are applied to a specific city, Alghero, to classify the city, calculate tourism unsustainability index, identify negative dynamics and suggest possible policies to Local Administration.

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