Gestão geoambiental de bacias hidrográficas: os sistemas geológicos como fase inicial de decisão para uso da terra

Abstract

After the mapping of the Paracatu River basin (Northwestern Minas Gerais, Brazil) was updated on a scale of 1:250,000, it was possible to elaborate the rationale for the methodology of geo-environmental/geosystems management as part of a broad management methodology, under development since 1998. It presents as the first step to verify the relationship between rocks, landforms, and soils with which one can explore possibilities and potential land use for agricultural production, forestry, rural industrial, energy production, and civil works. With the framework of potentials based on geosystems, it was possible to make an evaluation analysis about the terms of settlement or inconvenience of the land current uses, the possibilities for expansion of uses, and the requirements for mitigation under the terms of the substrate stability. With the mapping at the 1:250,000 scale, it was possible to establish a regional vision provide the indicative scale studies and local decision-making that still involves a number of other sciences, engineering as well as the econometric models. This article presented the procedures of the first stage of the aid business decision making, step-by-step.