Temporal and spatial analysis of the waters of the irrigated perimeter Cotinguiba/Pindoba in the hydrographic region of the lower São Francisco Sergipano

• Autor(a) principal: Souza, Amanda Oliveira
• Data de Publicação: 2021
• Outros Autores: Carvalho, Clayton Moura de, Gomes Filho, Raimundo Rodrigues, Garcia, Carlos Alexandre Borges, Cerqueira, Elder Sanzio Aguiar, Valnir Júnior, Manoel, Carvalho, Leonaria Luna Silva de, Saraiva, Kleiton Rocha, Silva, Anamália Ferreira da
• Tipo de documento: Artigo
• Idioma: por
• Título da fonte: Research, Society and Development
• Texto Completo: https://rsdjournal.org/index.php/rsd/article/view/12403
• topic: Water quality; Water pollution; Water resources; Irrigation.; Calidad del agua; La contaminación del agua; Los recursos de agua; Irrigación.; Qualidade da água; Poluição das águas; Recursos hídricos; Irrigação.

Irrigation with inadequate management can alter the quality of water resources. Given this information, the objective of this research was to evaluate the impact of irrigation, especially rice growing, on the quality of surface water in the Cotinguiba/Pindoba Irrigation Perimeter, located in the region. watershed of the Lower São Francisco Sergipano. In this research, 22 water quality parameters were evaluated (total alkalinity, calcium, chlorides, chlorophyll-a, thermotolerant coliforms, total coliforms, electrical conductivity, apparent color, DBO, DQO, dissolved iron, total iron, total phosphorus, magnesium, nitrate , dissolved oxygen, pH, suspended solids, dissolved solids, total solids, temperature and turbidity), obtained from secondary data from the water quality monitoring program provided by the São Francisco and Parnaíba Development Company (CODEVASF), through the reports of the monitoring campaigns carried out in the years 2006, 2013 and 2014, and compared with the values established by CONAMA resolution 357/2005. The concentrations of total phosphorus and color did not meet the standards of freshwater class II. The maximum value of electrical conductivity found in this study presents light to moderate restrictions for the use of water for irrigation. The analysis of water quality showed that the contribution of drained water from the Cotinguiba/Pindoba Perimeter contributed to the increase in the concentration of some variables, therefore, the importance of maintaining an environmental management plan to mitigate impacts.