{"id":{"repo_id":"brazil-uerj","oai_identifier":"oai:pantheon.ufrj.br:11422/6626"},"canonical_url":"https://search.dev.ndltd.org/etd/brazil-uerj/oai:pantheon.ufrj.br:11422/6626","repository":{"repo_id":"brazil-uerj","name":"Brazil UERJ","base_url":"https://pantheon.ufrj.br/oai/request"},"display":{"title":"Omega, modelo de formulação não linear dos processos hidrológicos","abstract":"Hydrologic models, in general, perform a linearization of non-linear phenomena in such a way that the model becomes a simply parametric and numeric formulation. lnstead of that, OMEGA uses a more consistent mathematical representation of the physical processes in a hydrologic system. OMEGA model is strongly based on the physical concepts of hydrologic phenomena, even for the mathematical representation of highly nonlinear processes such as infiltration, saturation time and water redistribution on the soil. OMEGA accepts nonuniform values for precipitation and hydrologic parameters, and considers all the hydrologic processes as functions of the soil moisture. ln semiarid regions, as for example Northeast Brazil, the infiltration and evapotranspiration processes are specially important for the soil hydrodynamics. ln this kind of regions, soil moisture sometimes is extremely low and may cause significant variations of superficial run-off produced by intense precipitations after an excessive dry season. This phenomena is relatively frequent in the beginning of the rainy season. OMEGA model has been applied to Jatoba, a 28,6 Km2 subbasin, located in the Sume representative hydrographic basin, monitored by SUDENE under technical collaboration of ORSTOM. The results obtained in Jatoba have shown the consistency and accuracy of this methodology for a proper representation of the hydrologic processes and have been quite useful for the SUDENE and ORSTOM hydrologic analysis. Future applications of the present model to other representative basins in semiarid regions will be helpful to the understanding of the soil-water relationship and for forecasting purposes of hydrologic issues.","abstract_html":"Hydrologic models, in general, perform a linearization of non-linear phenomena in such a way that the model becomes a simply parametric and numeric formulation. lnstead of that, OMEGA uses a more consistent mathematical representation of the physical processes in a hydrologic system. OMEGA model is strongly based on the physical concepts of hydrologic phenomena, even for the mathematical representation of highly nonlinear processes such as infiltration, saturation time and water redistribution on the soil. OMEGA accepts nonuniform values for precipitation and hydrologic parameters, and considers all the hydrologic processes as functions of the soil moisture. ln semiarid regions, as for example Northeast Brazil, the infiltration and evapotranspiration processes are specially important for the soil hydrodynamics. ln this kind of regions, soil moisture sometimes is extremely low and may cause significant variations of superficial run-off produced by intense precipitations after an excessive dry season. This phenomena is relatively frequent in the beginning of the rainy season. OMEGA model has been applied to Jatoba, a 28,6 Km2 subbasin, located in the Sume representative hydrographic basin, monitored by SUDENE under technical collaboration of ORSTOM. The results obtained in Jatoba have shown the consistency and accuracy of this methodology for a proper representation of the hydrologic processes and have been quite useful for the SUDENE and ORSTOM hydrologic analysis. Future applications of the present model to other representative basins in semiarid regions will be helpful to the understanding of the soil-water relationship and for forecasting purposes of hydrologic issues.","abstract_has_math":false,"creators":["Araújo Filho, Paulo Frassinete"],"institution":"Universidade Federal do Rio de Janeiro","degree_name":null,"degree_level":null,"degree_discipline":null,"degree_department":null,"school":null,"contributors":[],"advisors":["Magalhães, Paulo Canedo de"],"committee_chairs":[],"committee_members":[],"year":1992,"date_issued":"1992-05","date_published":"1992-05","updated_at":"2026-07-24T01:16:24Z","subjects":["Balanço hídrico","Modelos não lineares"],"languages":["por"],"rights":["Acesso Aberto"],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":"http://hdl.handle.net/11422/6626","outbound_label":"Handle","outbound_source":"dc:identifier.uri"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor.advisor","label":"Advisor","values":["Magalhães, Paulo Canedo de"]},{"key":"dc:creator","label":"Author","values":["Araújo Filho, Paulo Frassinete"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date.accessioned","label":"Dc Date Accessioned","values":["2019-02-27T18:20:54Z"]},{"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":["Balanço hídrico","Modelos não lineares"]}]},{"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/11422/6626"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description.abstract","label":"Abstract","values":["Hydrologic models, in general, perform a linearization of non-linear phenomena in such a way that the model becomes a simply parametric and numeric formulation. lnstead of that, OMEGA uses a more consistent mathematical representation of the physical processes in a hydrologic system. OMEGA model is strongly based on the physical concepts of hydrologic phenomena, even for the mathematical representation of highly nonlinear processes such as infiltration, saturation time and water redistribution on the soil. OMEGA accepts nonuniform values for precipitation and hydrologic parameters, and considers all the hydrologic processes as functions of the soil moisture. ln semiarid regions, as for example Northeast Brazil, the infiltration and evapotranspiration processes are specially important for the soil hydrodynamics. ln this kind of regions, soil moisture sometimes is extremely low and may cause significant variations of superficial run-off produced by intense precipitations after an excessive dry season. This phenomena is relatively frequent in the beginning of the rainy season. OMEGA model has been applied to Jatoba, a 28,6 Km2 subbasin, located in the Sume representative hydrographic basin, monitored by SUDENE under technical collaboration of ORSTOM. The results obtained in Jatoba have shown the consistency and accuracy of this methodology for a proper representation of the hydrologic processes and have been quite useful for the SUDENE and ORSTOM hydrologic analysis. Future applications of the present model to other representative basins in semiarid regions will be helpful to the understanding of the soil-water relationship and for forecasting purposes of hydrologic issues."]},{"key":"dc:title","label":"Title","values":["Omega, modelo de formulação não linear dos processos hidrológicos"]}]}],"canonical_facts":{"dc:contributor.advisor":["Magalhães, Paulo Canedo de"],"dc:creator":["Araújo Filho, Paulo Frassinete"],"dc:date.accessioned":["2019-02-27T18:20:54Z"],"dc:date.available":["2026-05-16T03:04:55Z"],"dc:date.issued":["1992-05"],"dc:description.abstract":["Hydrologic models, in general, perform a linearization of non-linear phenomena in such a way that the model becomes a simply parametric and numeric formulation. lnstead of that, OMEGA uses a more consistent mathematical representation of the physical processes in a hydrologic system. OMEGA model is strongly based on the physical concepts of hydrologic phenomena, even for the mathematical representation of highly nonlinear processes such as infiltration, saturation time and water redistribution on the soil. OMEGA accepts nonuniform values for precipitation and hydrologic parameters, and considers all the hydrologic processes as functions of the soil moisture. ln semiarid regions, as for example Northeast Brazil, the infiltration and evapotranspiration processes are specially important for the soil hydrodynamics. ln this kind of regions, soil moisture sometimes is extremely low and may cause significant variations of superficial run-off produced by intense precipitations after an excessive dry season. This phenomena is relatively frequent in the beginning of the rainy season. OMEGA model has been applied to Jatoba, a 28,6 Km2 subbasin, located in the Sume representative hydrographic basin, monitored by SUDENE under technical collaboration of ORSTOM. The results obtained in Jatoba have shown the consistency and accuracy of this methodology for a proper representation of the hydrologic processes and have been quite useful for the SUDENE and ORSTOM hydrologic analysis. Future applications of the present model to other representative basins in semiarid regions will be helpful to the understanding of the soil-water relationship and for forecasting purposes of hydrologic issues."],"dc:identifier.uri":["http://hdl.handle.net/11422/6626"],"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":["Balanço hídrico","Modelos não lineares"],"dc:title":["Omega, modelo de formulação não linear dos processos hidrológicos"],"dc:type":["Dissertação"]},"updated_at":"2026-07-24T01:16:24Z"}