Evaluation of concentrations of nutrients and solids in the Igarapé Belmont watershed, Porto Velho / RO

• Autor(a) principal: Gonzaga, Lídia Bruna Teles
• Data de Publicação: 2021
• Outros Autores: Lopes, Valério Magalhães, Hurtado, Fernanda Bay
• Tipo de documento: Artigo
• Idioma: por
• Título da fonte: Diversitas Journal
• Texto Completo: https://diversitasjournal.com.br/diversitas_journal/article/view/1785

Human activities alter the natural processes of water resources, generating changes in the quantity and quality of water, mainly in urban watersheds. In this context, the objective of this work was to assess water quality in an anthropized area and in an urban forest, by analyzing physical-chemical parameters in the Igarapé Belmont basin, located in the municipality of Porto Velho (RO), a tributary of the Madeira River. Monitoring was carried out at six points, one upstream, one downstream and none inside the conservation unit, Porto Velho Municipal Natural Park, with quarterly frequency, in the rainy and dry seasons, between March and December / 2019. The parameters analyzed were nitrogen (nitrite, nitrate and ammoniacal nitrogen), total phosphorus and total solid. Statistical data treatment was performed, descriptively and with the application of Pearson's correlation. There was a strong temporal and spatial influence on water quality, with higher concentrations in the drought period (ammoniacal nitrogen and total phosphorus), at the collection point inserted in anthropized area, were above what was established by CONAMA resolution 357/2005. It is also possible to determine, according to Pearson's coefficient, that there is a strong correlation between the total solid and the other parameters analyzed. Based on the analysis of the data presented in this research, some nutrients increased the concentration due to the area of urban influence contained in the hydrographic basin and due to the seasonal period.