Estimativas de volumes de sedimentos aportados para o reservatório da Pampulha em períodos compreendidos entre novembro de 2012 e novembro de 2014

Abstract

Population and economic growth coupled with the environmental conditions of each region can generate numerous problems related to water, such as the restriction of availability and water pollution due to lack of sanitation. It is necessary to optimize the management of water resources, through an integrated planning that involves the various spheres of public power, private and civil society. The management of rivers, lakes and reservoirs should be conceived within their river basin, this being the planning unit where they are inserted. The reservoirs situated in urban areas are particularly prone to suffer from several types of anthropic impacts, and the Pampulha reservoir, located in Belo Horizonte, does not escape this rule (PINTO-COELHO et al., 2012). In recent years, the City of Belo Horizonte has committed itself to an ample project of recovery and revitalization of this reservoir, whose actions involve, among others, the desanding of the dam. By means of bibliographic reviews and analysis of technical documents, this work deals with the physiographic and environmental characterization of the Pampulha reservoir and its hydrographic basin, with emphasis on the sedimentation process of its watercourses. The interpretation of data available in studies and reports produced during the Pampulha Reservoir Desorption Services in the 2013-2014 biennium allowed the estimation of sediment supply volumes for the dam at certain periods. Special mention should be made of bathymetric reports made before, during and after the interventions of desorption. In addition, the study also suggests possible factors that influence the production and the contribution of sediments in the Pampulha basin, associating indicators such as earthworks, demographic growth, erosion, among other contributions inherent to the river basin use and occupation of the soil.