Characterization of solid waste in the permanent preservation area of the Bate Estacas stream, Porto Velho, Rondônia

Abstract

Permanent Preservation Areas serve as filters to prevent impurities from reaching water bodies, protecting the banks from erosion, avoiding the obstruction of rivers caused by waste dumped in inappropriate places. The present study aimed to inventory, quantify, and analyze the types of solid waste irregularly deposited on the banks and in the Bate Estacas stream in Porto Velho, Rondônia. The Bate Estaca stream is approximately 6.5 km² long, covering the Cohab, Castanheira, Caladinho, and Aeroclube neighborhoods. The data collection was conducted in plots located in isolated tree stretches, approximately 100 meters long, in the stream's Permanent Preservation Areas. The plots' dimensions were 10x10 meters, separated by a distance of 10 meters, totaling three plots. This study presented data on the composition and average weight of solid waste in Permanent Preservation Areas, associated with urban streams in Porto Velho's municipality. We recorded almost 3 tons of waste in 300m², with plastic being the dominant item in quantity and construction material in weight. The irregular disposal is a result of the lack of inspection, basic sanitation, and knowledge of the residents living near the stream about the importance of these areas.