Geotechnical mapping of the urban perimeter of Chapada dos Guimarães: subsidies to the city master plan

Abstract

The cartographic prediction, characterization, and documentation of geological processes and hazard areas have fundamental importance for land-use regulation and planning, respecting the potentials and limits of the lands. Geotechnical mapping is an effective tool, which provides local authorities with such information, as demonstrated in the elaboration of the geotechnical mapping of the urban area of Chapada dos Guimarães, in Mato Grosso state, Brazil. The morphopedological approach was used, and it allowed the integrated interpretation of physical components and deductions of water shed operations. It also allowed the boundary identification of areas of relative homogeneity, as far as physical processes, geotechnical attributes, potentialities and restrictions of land use are concerned. Six geotechnical units were defined and characterized. One was favorable for using without restrictions; two others were restricted but subject to control by Civil Engineering works and the remaining three ones presented geological risks associated with mass movement and erosion. The latter was considered non favorable for human occupation, therefore of restricted use, and specific planning conditions.