Determinação experimental do coeficiente de reaeração, em rios e canais abertos, com o emprego de traçadores

In this work, the reaeration coefficient, K2 in natural waters is determined experimentally using Tsivoglou's radioactive tracer method. The technique employed involves the use of an inert radioactive gas, Kr-85, as a tracer for oxygen, tritiated water, HTO, to correct for dispersion and dilution of tracer, and a fluorescent tracer, Amidorodamina G.E., with a view to determining the instant at which to start sample collection in field work. The experiments were performed in a part of the Mato Grosso channel and Saracuruna river (RJ) along a 11.2 km reach. A summary of reaeration modelling studies, a comparative analysis of the experimental methods for the determination of the reaeration coefficient, and radioactive tracer method fundamentals, are presented along with specific experimental details and special devices which were used in both laboratory and field work. Measured values of K2 are compared with computed values obtained from predictive models and are fit to a semiempirical equation involving hidraulic parameters. An analysis is made of losses of Amidorodamina G. E., and these are compared with those of conservative tracer, HTO.

Grantor dc:publisher

Universidade Federal do Rio de Janeiro

Year dc:date.issued

1982

Author dc:creator

• Vendrame, Iria Fernandes

Advisor dc:contributor.advisor

• Roldão, João Sérgio Fajardo

• Engenharia Civil

Statement dc:rights

• Acesso Aberto

Language dc:language

por

Handle dc:identifier.uri

http://hdl.handle.net/11422/3241

OAI identifier oai:identifier

oai:pantheon.ufrj.br:11422/3241