Desassoreamento de rios: Quando o poder público ignora as causas, a biodiversidade e a ciência

Abstract

River sedimentation is usually solved by dredging the sediment deposited in its bed, employing many techniques. In dealing with a concrete case, the objective is to expose the lack of technical criteria for the execution of such intervention, the impacts to the river, aquatic biota and its real need. Here, aspects of the dissociation between consecrated understandings in the engineering and their mismatch with the ecological theories are presented. This work aimed to study urban floods, elucidating their causes, to propose measures and new technologies to deal with them, through programs and urban policies. The intention is to detail the causes of urban floods, understanding the factors involved with it and with that, discuss how public power should proceed in what refers to the dredging. The main objective of this work is to stimulate the incorporation of urban rivers into ecological studies and to draw public attention to this issue.