MORPHOMETRIC AND GEOMORPHOLOGICAL ANALYSIS OF HYDROGRAPHIC SISTER BASINS: CARTOGRAPHIC CONTRIBUTIONS TO PLANNING

Abstract

This article aims to discuss the contributions of morphometric and geomorphological cartography for the analysis of the relief in sister basins. It presents the application of a methodology that proposes the organization of a sequence of cartographic documents: Declivity or Clinographic, Horizontal Dissection, Vertical Dissection, Relief Energy and Geomorphological Detail. The hydrographic basin, a spatial mapping unit, is understood as a system, as well as an integrative functional unit for the analysis of geomorphological dynamics. There for, we applied the cartographic techniques mentioned in sister basins, with the case study of the basins of Piracicamirim and Tijuco Preto rivers, both tributaries of Piracicaba River, located in Peripheral Depression of São Paulo. The results obtained from the analysis of the organized documents contributed to the identification of areas potentially susceptible to the unleashing of denudatory processes, as well as gauged the denudatory features, especially the linear ones. Of particular note were sectors that presented marked denudatory features that were associated to classes with high morphometric potential in areas of pedological/lithological fragility and intense dynamics of land use and occupation, marked by sugar cane monoculture.