Zoneamento de suscetibilidade a movimentos de massa em Arroio do Padre/RS

Abstract

Arroio do Padre has a background of intense and extended precipitation with erosive processes and social, economic and environmental damage resulting from such events. These events were essential to the execution of the current study. Focused on the torrent-triggered landslides of November 15th 2010, this study aimed to perform a landslide susceptibility zoning for the municipality of Arroio do Padre/RS. In order to prepare a landslide susceptibility map, 6 layers containing data (constraint) were used: declivity, land cover and land use, pedology, geomorphology, geology and slope orientation. Each one of these constraints, and also their own variables, were given a weight according to their exerted influence over the slopes’ instability. The map, once generated, allowed the zoning of areas, accordingly to their susceptibility degree (very low, low, medium, high and very high), to be achieved. Areas showing high and very high degrees deserve a greater attention, from farmers and public authorities, by adopting conservational practices in crop areas, certifying that the crop is suitable for the cultivation area, promoting the recovery of degraded areas, and regenerating forests.