Processi di periurbanizzazione nei paesaggi dell'olivo

The urban sprawl in the agrarian territories of Sassari started more than twenty years ago, even if the urban development is disciplined by urban planning. In the essay we read the evolution of land use and land government, according to the plans at different scales; furthermore, a diachronic analysis of land use transformations is done, to underline the trends toward a sort of urban “dispersion” or “diffusion” (Indovina 1990), both residential and commercial. Such urban phenomenon is articulated in different areas, characterized by different ways of interaction between residential (or commercial) and (residual and marginal) agrarian land uses. This forms of interaction oscillate between two conditions: one is a sort of “olive trees and residential landscape”, aunicumof interaction between the trees matrix and the settlement. This landscape – in which the relationship with the environmental structure of the territory (the valleys system, Monte Bianchinu, Monte Oro) is privileged– is opposed to the settlements superimposed to the historical agricultural matrix (Li Punti, Predda Niedda), which dim it and determine non-structured hybrid edges. Between these situations, intermediate forms of interaction can be recognized; these need planning rulesad hoc, that choose the most suitable “devices” to govern the urban phenomena and to maintain the original landscape matrix.