A condição de explotação de água subterrânea em Minas Gerais à luz dos critérios da deliberação normativa conjunta COPAM-CERH 05/2017

Abstract

Groundwater overexploitation brings a series of consequences in the most diverse spatial and temporal scales due to the complex functioning of aquifer systems and their interaction with the physical environment. The lack of specific and consolidated legislation governing the use of groundwater has contributed to this issue in Brazil. To improve the water resource managements and face the challenges related to groundwater control and maintenance in the state of Minas Gerais, the COPAM-CERH Normative Deliberation No. 05, dated 09/14/2017 (DN 05/2017), establishes guidelines and procedures for defining groundwater use restriction and control areas. The goal of this paper is the preliminary survey of “Restriction and Control in Evaluation Areas” due to overexploitation in the state of Minas Gerais, according to the guidelines established by DN 05/2017. Based on analysis of spatial distribution of existing well grants and groundwater use insignificant registries in the ottobasins of level 6 and 8 of the state, 215 “Restriction and Control in Evaluation Areas” were defined, among the 15,352 ottobasins analyzed. Once these areas have been identified, it is up to the managing agency to establish the order of priority for carrying out studies that may or may not confirm overexploitation, indicated in Articles 11 and 12 of the Deliberation and, adopt the necessary control measures, if necessary.