Análise histórica da adequabilidade do uso das terras em uma microbacia hidrográfica no Município de Piracicaba

Abstract

Old aerial photographs (1940) were used for a temporal and spatial analysis of land use suitability of a watershed in Piracicaba County. Aerial photographs of 1962, 1978 and 1995 were used too. The analyses were performed on Idrisi. Despite the antiquity, the 1940’aerial photographs were interpreted in a satisfactory manner and the control points selected allowed the overall georeferencing and analyses. The use of old aerial photographs showed that already in 1940 a considerable part of the watershed, 27,66%, was inadequately used. This land use pattern repeated in 1962, 1978 and 1995. While 10,25% of the watershed was inadequately used in all dates, only 56,51% of the land suitable for crops was used with sugarcane in 1995.