Sediment Transfer through the Fluvial System
(Proceedings of a symposium held in Moscow, August 2004). IAHS Publ. 288, 2004, 332–336Sedimentological assessment of the Tucuruí Reservoir (Tocantins River, Brazil)
NEWTON DE OLIVEIRA CARVALHO1, ANTÔNIO RAIMUNDO SANTOS RIBEIRO COIMBRA2, BRUNO LEONEL PAYOLLA2, TARCÍSIO LUIZ COELHO DE CASTRO3 & ANDERSON BRAGA MENDES4
1 Sedimentology and Water Resources Adviser, Rua Conde de Baependi, 112 ap. 904, Flamengo, Cep 22231-140,
Rio de Janeiro,RJ; Brazil
2 Centrais Elétricas do Norte do Brasil, ELETRONORTE.
SCN, Quadra 6, Bloco, C Sala 501, Ed. Venвncio 3000,3 Engevix Engenharia S/A, SCN Q. 04, Bloco B, 13º andar, Pétala D, Centro Empresarial Varig, Brazil
4 Engevix Engenharia S/A, Rua José Rodrigues dos Santos, 117, Bela Vista, Duque de Caxias, RJ, Brazil
Abstract The results of a study on the sedimentation in Tucuruí Reservoir, located in the lower reaches of the Tocantins River, Brazil, are presented. Morphological information on reservoir sediment deposits and sediment transport data collected since dam closure in 1984 were utilized. These data were used to construct an empiricial model of reservoir sedimentation that allowed an assessment of the impact of land use change upstream Tucuruí Dam. Results of the model show there is not any short or medium-term problem regarding the development of sediment deposits at the water intake sill of the reservoir. Future work on topographic surveys in the river and sedimentological studies in the reservoir are recommended.
Key words Brazil; deposit heights at dam toe; erosion; reservoir; sediment; sediment distribution; Tocantins River; useful life