Análise sedimentológica de trecho do rio São Miguel em Anadia, Alagoas

Abstract

The present study aims to perform a sedimentological analysis in a section located in the municipality of Anadia, more precisely located in the São Miguel River basin, in Alagoas, a river of great importance for inland municipalities that depend on this water body that is widely used for transportation and commercial activities (such as fishing and agriculture). This study can serve as a basis for future studies that serve society in a way that can meet the needs of the population and the importance of conservation/recovery of marginal areas for sustainable use. Using the methodology of defining two collection points, where one is closer to the urban area and the other further away, traced in stages, the first was the field collection, followed by resting the samples in the laboratory, washing, drying, sieving the samples and statistical analysis in the Sysgran 4.0 software. The parameters evaluated were granulometric (kurtosis, asymmetry, classification, mean, median and percentages of sediments found in the samples) and statistical (definition of the predominance of grains). The results were promising, with a high content of sandy and positive grains, which means that the studied site has a greater tendency for deposition than erosion, which may indicate some possible scenarios, including silting. Anthropogenic actions such as irregular disposal of household materials are of relevant concern due to the concerns regarding pollution of the water body, a situation that was already expected due to the proximity to an urban area. Therefore, this study can help public managers identify the importance and need for public measures that introduce knowledge to the population, especially in the municipality of Anadia, in Alagoas.