La cartografia storica delle acque fonte indispensabile per le rappresentazioni contemporanee dei luoghi fluviali WATER HISTORIC CARTOGRAPHY AN INDISPENSABLE SOURCE FOR THE CONTEMPORAY REPRESENTATIONS OF THE RIVER PLACES: ΤΗΕ ΟΑSΕS ΟF ΟRCΟ ΑΝD ΤΙCΙΝΟ RIVΕRS

In this message we want to investigate the first part of a methodology concerning an utilitarian approach to the maintenance of the riversides and, meanwhile, a naturalistic approach to the so called hydraulic-works that may be comprised in «sustainable projects». The method, denominated B.G.G.S.V. (acronym deduced from the name of the authors) have been described in first approximation, in a recent message produced at the congress Ticino Hydraulic Aplomb, (TICINO SICUREZZA IDRAULICA) of March 2004, in Cameri, the seat of Ticino Park. This method derive (result) from geographic studies developed in the first Eighty years, inside a Convention between University of Turin and Piedmont Region about historic cartography from a text by Dino Barrera, entitled Historical Cartography and History of places (Cartografia storica e storia dei luoghi) presented in 1984 in Cagliari (Sardinia), from some research concerning the rivers Orco and Ticino, particulary focused on hydraulic works, water régime, and agricultural and industrial use of waters. Such studies generated the founder commencements of ICA. (Institute of Water Cartography – istituto di cartografia delle Acque) of Turin. We can associate to such studies about cartographic representation of the river places we can associate the techniques of orthophotographic representation and deduce from this association a method for selecting informations for a modern water cartography In this seat we want to pick out a methodology of codification to prepare a protocol for analyzing historic cartography and archive materials referable to itself like big scale restitutions, the relief maps connected to the quarrels, the projects and the hydrulics works and water régimes.