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The paper intend to discuss an analytical methodology aiming at the construction of multidiscipline and multiple-scale connectivity pattern able to provide the means for the delineation of both coherent global strategy and the implementation of local policies in peri-urban areas of a semi-arid Mediterranean region. The study of river systems is an interesting field of work. It stimulates the identification of cognitive maps and innovative investigative instruments with a high level of interdisciplinary between ecology and environmental planning. Rivers, more than any other ecological phenomena, clearly leave on the landscape the marks of the forces and processes that form them. The percolation theory is useful to verify how the tesseras of an environmental mosaic can constitute the cells of a percolating matrix, which coincides differently with each of the crossscale models of the study area. The final aim was to evaluate connectivity by means of the scales of the model, - filter, barrier and conduit in the fluvial corridors of a sub urban and semi arid region (Central Apulia, South Italy)