Eficiência de projetos de reabilitação de rios urbanos no Brasil: um estudo de caso do programa DRENURBS - Belo Horizonte (MG)

Abstract

The DRENURBS Program was part of the Urban Drainage Master Plan of the city of Belo Horizonte and included the Córrego do Onça sub-basin from 2003 to 2010, where the Baleares, First of May and Nossa Senhora da Piedade streams are located. The objective was to evaluate the efficiency of DRENURBS in the rehabilitation process of three urban streams, comparing the moment immediately after rehabilitation (2008) with current state (2018), including three other streams in reference conditions located in urban parks. We applied a rapid assessment protocol for physical habitats, measured physical and chemical parameters in the water column, and collected benthic bioindicators in six streams. Based on the comparative analysis of the current biological data with those collected 10 years ago, and also in comparison to the reference conditions, the rehabilitation project carried out in the three urban streams resulted in an improvement in water quality, an increase in the wealth of invertebrates bioindicators , including organisms that tolerate organic pollution.