Resumo

SERGIO, C. et al. Levantamento físico conservacionista do Ribeirão Lavapés, Botucatu, sp. Rev. Fac. Agron. [online]. 2005, vol.22, n.2, pp.170-184. ISSN 0378-7818.

Abstract The aim of this research was to elaborate the physical conservation survey of the basin of the Lavapés River, Botucatu, São Paulo, Brazil, for the rational soil occupation based on the «Ruggedness number». The following conclusions showed that the degree of the environmental physical deterioration for the basin was of 69.46%. The high values of the determination degree was probably due to the inappropriate use of the land which caused silting of the reservoirs and the creek sedimentation. The average Ruggedness number for the basin of Lavapés River allowed its classification for agricultural, cattle-raising and reforest, with the principal vocation for the cattle-raising use (Class B). The images of the Sensor TM LANDSAT 5 allowed a quickly mapping of soil use of the basin, and provided a database for future planning. The parameter and the ruggedness number allowed to classify the basin as 5, 8 and 9 with vocation for agriculture (Class A); basins 1, 6, 9 and 10 for cattle-raising (Class B); basins 2, 4 and 7 for cattle-raising and reforest (Class C) and basin 3 for forestry and reforest (Class D).

Palavras-chave : ruggedness number; soil occupation; physical conservation surveying.