CARACTERIZAÇÃO DO SEDIMENTO DOS RIOS MUNIM E IGUARÁ NO MUNICÍPIO DE NINA RODRIGUES NO MARANHÃO, BRASIL
DOI:
https://doi.org/10.16891/2317-434X.v11.e3.a2023.pp2976-2983Abstract
Sediments are composed of solid particles with high heterogeneity and many materials distributed along the water resource. The city of Nina Rodrigues was mainly due to its relief, hills and the margin of the rivers Iguará and Munim. These are confluent rivers and close to the city center. The objective was to evaluate the physical-chemical characterization of the sediment in the proximity of the rivers Munim and Iguará. Sediment samples were collected in six points in two dry periods and two in the rainy periods in the year 2020. Subsequently, the samples were stored in plastic bags and kept in Styrofoam boxes and sent to the laboratory for analysis of pH, total phosphorus, nitrite, nitrate, calcium and magnesium and particle size, organic matter, organic carbon of the sediment. The results of the analyses showed that, in the Munim and Iguará Rivers, at the sampled points, there is only a sandy texture class, with a predominance of fine sand; the sediments are essentially inorganic and have an acid character. The values found for nutrients were 3.84±0.68 and 4.44±0.40 mg. mL-1, nitrite 0.54±0.12 and 0.99±0.41mg. mL-1, nitrate 2.70±1.00 and 3.10±0.18 mg. mL-1 and total phosphorus 2.71±0.61 and 3.88±0.75 mg. mL-1. These sediment physicochemical results obtained in this watershed and that may be associated with environmental impacts. We emphasize that Environmental Education is of utmost importance in the contribution of knowledge and intensifying inspection and actions aimed at basic sanitation, preservation and recovery of degraded areas are important factors to minimize environmental impacts.
Keywords: River; Sediment; Environmental; Perception