Compaction and Waterproofing of the Soil in the Urban Fluvial Channels

Abstract

The expansion and the urban densification have implied phenomena related to the degradation of watersheds. This work aims to evaluate the influence of anthropic pressure increase on the imbalances involving erosive processes and consequent degradation of the river plain of a watershed in Aparecida de Goiânia - GO. The methodology comprehended the spatial-temporal correlation between reduction of concentration time, increase of surface runoff estimates, and the consequent degradation of the lowlands in 1992, 2005 and 2016. The results indicate an increase of erosions in segments of convergence of channels, low altimetric gradient and occurrence of Fluovian Neosol, resulting from the increase of volume and peaks of flow coming from areas of significant densification process in the last 24 years. Thus, it is important to use indicators of anthropic pressure increase in the understanding of impacts related to urban density.