{"id":{"repo_id":"brazil-uerj","oai_identifier":"oai:pantheon.ufrj.br:11422/6636"},"canonical_url":"https://search.dev.ndltd.org/etd/brazil-uerj/oai:pantheon.ufrj.br:11422/6636","repository":{"repo_id":"brazil-uerj","name":"Brazil UERJ","base_url":"https://pantheon.ufrj.br/oai/request"},"display":{"title":"Determinação experimental do coeficiente de reaeração em rios, com o uso de traçador gasoso inerte","abstract":"ln this work, the reaeration coefficient, K2, in rivers is experimentally determined using the so-called Modified Tracer Technique. In this technique an inert hydrocarbon gas tracer, the propane, is used to simulate oxygen, and a fluorescent tracer, Amidorhodamine G Extra, as a reference tracer. The technique has been apllied in rivers with low flow rates, replacing the metodology developed by Tsivoglou, that uses a radioactive gas tracer, the Kr-85. ln this work the possibility of extrapolating the technique to rivers with high flow rates is studied. The experiments were performed on a 40 Km long reach of the Paraíba do Sul river, between Volta Redonda and Barra do Piraí cities. It is presented the theoretical basis of the modified tracer technique, the procedures employed during the field and laboratory experiments, and the devices which were used in both laboratory and field work. Measured values of K2 are compared with computed values obtained from predictive equations.","abstract_html":"ln this work, the reaeration coefficient, K2, in rivers is experimentally determined using the so-called Modified Tracer Technique. In this technique an inert hydrocarbon gas tracer, the propane, is used to simulate oxygen, and a fluorescent tracer, Amidorhodamine G Extra, as a reference tracer. The technique has been apllied in rivers with low flow rates, replacing the metodology developed by Tsivoglou, that uses a radioactive gas tracer, the Kr-85. ln this work the possibility of extrapolating the technique to rivers with high flow rates is studied. The experiments were performed on a 40 Km long reach of the Paraíba do Sul river, between Volta Redonda and Barra do Piraí cities. It is presented the theoretical basis of the modified tracer technique, the procedures employed during the field and laboratory experiments, and the devices which were used in both laboratory and field work. Measured values of K2 are compared with computed values obtained from predictive equations.","abstract_has_math":false,"creators":["Gleizer, Simone"],"institution":"Universidade Federal do Rio de Janeiro","degree_name":null,"degree_level":null,"degree_discipline":null,"degree_department":null,"school":null,"contributors":[],"advisors":["Roldão, João Sérgio Fajardo"],"committee_chairs":[],"committee_members":[],"year":1992,"date_issued":"1992-05","date_published":"1992-05","updated_at":"2026-07-24T01:16:24Z","subjects":["Engenharia Civil"],"languages":["por"],"rights":["Acesso Aberto"],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":"http://hdl.handle.net/11422/6636","outbound_label":"Handle","outbound_source":"dc:identifier.uri"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor.advisor","label":"Advisor","values":["Roldão, João Sérgio Fajardo"]},{"key":"dc:creator","label":"Author","values":["Gleizer, Simone"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date.accessioned","label":"Dc Date Accessioned","values":["2019-03-11T14:49:59Z"]},{"key":"dc:date.available","label":"Dc Date Available","values":["2026-05-16T03:04:55Z"]},{"key":"dc:date.issued","label":"Date","values":["1992-05"]},{"key":"dc:publisher","label":"Institution","values":["Universidade Federal do Rio de Janeiro"]},{"key":"dc:publisher.department","label":"Dc Publisher Department","values":["Instituto Alberto Luiz Coimbra de Pós-Graduação e Pesquisa de Engenharia"]},{"key":"dc:type","label":"Dc Type","values":["Dissertação"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["Engenharia Civil"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language","label":"Dc Language","values":["por"]},{"key":"dc:rights","label":"Dc Rights","values":["Acesso Aberto"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier.uri","label":"Identifier URI","values":["http://hdl.handle.net/11422/6636"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description.abstract","label":"Abstract","values":["ln this work, the reaeration coefficient, K2, in rivers is experimentally determined using the so-called Modified Tracer Technique. In this technique an inert hydrocarbon gas tracer, the propane, is used to simulate oxygen, and a fluorescent tracer, Amidorhodamine G Extra, as a reference tracer. The technique has been apllied in rivers with low flow rates, replacing the metodology developed by Tsivoglou, that uses a radioactive gas tracer, the Kr-85. ln this work the possibility of extrapolating the technique to rivers with high flow rates is studied. The experiments were performed on a 40 Km long reach of the Paraíba do Sul river, between Volta Redonda and Barra do Piraí cities. It is presented the theoretical basis of the modified tracer technique, the procedures employed during the field and laboratory experiments, and the devices which were used in both laboratory and field work. Measured values of K2 are compared with computed values obtained from predictive equations."]},{"key":"dc:title","label":"Title","values":["Determinação experimental do coeficiente de reaeração em rios, com o uso de traçador gasoso inerte"]}]}],"canonical_facts":{"dc:contributor.advisor":["Roldão, João Sérgio Fajardo"],"dc:creator":["Gleizer, Simone"],"dc:date.accessioned":["2019-03-11T14:49:59Z"],"dc:date.available":["2026-05-16T03:04:55Z"],"dc:date.issued":["1992-05"],"dc:description.abstract":["ln this work, the reaeration coefficient, K2, in rivers is experimentally determined using the so-called Modified Tracer Technique. In this technique an inert hydrocarbon gas tracer, the propane, is used to simulate oxygen, and a fluorescent tracer, Amidorhodamine G Extra, as a reference tracer. The technique has been apllied in rivers with low flow rates, replacing the metodology developed by Tsivoglou, that uses a radioactive gas tracer, the Kr-85. ln this work the possibility of extrapolating the technique to rivers with high flow rates is studied. The experiments were performed on a 40 Km long reach of the Paraíba do Sul river, between Volta Redonda and Barra do Piraí cities. It is presented the theoretical basis of the modified tracer technique, the procedures employed during the field and laboratory experiments, and the devices which were used in both laboratory and field work. Measured values of K2 are compared with computed values obtained from predictive equations."],"dc:identifier.uri":["http://hdl.handle.net/11422/6636"],"dc:language":["por"],"dc:publisher":["Universidade Federal do Rio de Janeiro"],"dc:publisher.department":["Instituto Alberto Luiz Coimbra de Pós-Graduação e Pesquisa de Engenharia"],"dc:rights":["Acesso Aberto"],"dc:subject":["Engenharia Civil"],"dc:title":["Determinação experimental do coeficiente de reaeração em rios, com o uso de traçador gasoso inerte"],"dc:type":["Dissertação"]},"updated_at":"2026-07-24T01:16:24Z"}