Avaliação da vulnerabilidade ambiental de reservatórios à eutrofização

• Autor(a) principal: Figueirêdo, Maria Cléa Brito de
• Data de Publicação: 2007
• Outros Autores: Teixeira, Adunias dos Santos, Araújo, Lúcia de Fátima Pereira, Rosa, Morsyleide de Freitas, Paulino, Walt Disney, Mota, Francisco Suetônio Bastos, Araújo, José Carlos de
• Tipo de documento: Artigo
• Idioma: por
• Título da fonte: Repositório Institucional da Universidade Federal do Ceará (UFC)
• Texto Completo: http://www.repositorio.ufc.br/handle/riufc/67353
• topic: Eutrofização; Vulnerabilidade ambiental; SIG; Reservatórios; Acaraú

This work presents a tool to analyze the vulnerability of reservoirs to eutrophication, aiming to subsidize control and remediation actions related with this process. It was analyzed the water basins of Araras, Edson Queiroz and Jaibaras reservoirs, located in the Acaraú watershed, Ceará, Brazil. The multi-criteria analyses methodology used, in order to define environmental vulnerability indicators to reservoir eutrophication, considered reservoir sensibility and pressure factors in the water basin responsible for the transport of sediments and nutrients to the reservoir. A Geographic Information System (GIS) with map algebra as major tool was applied to soil use and occupation, declivity and erosion indicators. It was identified high vulnerability to eutrophication in the three mentioned reservoirs because of the waterbasins susceptibility to erosion, high phosphorous load mainly from the extensive cattle raising and low relative depth of the reservoirs.