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dc.rights.licenseAtribución-NoComercial 4.0 Internacional
dc.contributor.advisorGómez Giraldo, Evelio Andrés
dc.contributor.authorCórdoba Yepes, Stephany
dc.date.accessioned2021-10-13T16:00:10Z
dc.date.available2021-10-13T16:00:10Z
dc.date.issued2021
dc.identifier.urihttps://repositorio.unal.edu.co/handle/unal/80536
dc.descriptionilustraciones, diagramas, tablas
dc.description.abstractLos procesos de sedimentación limitan la vida útil de los embalses, esto a su vez representa una amenaza para la sostenibilidad de la energía hidroeléctrica, que representa el 70 % de la capacidad instalada en Colombia. En esta tesis se estudió la dinámica espacio temporal de la morfología del lecho y de los principales procesos de transporte de sedimentos dentro del embalse tropical Porce II, ubicado en el departamento de Antioquia, Colombia. Para esto se calibró y validó el modelo hidro-morfodinámico bidimensional Delft3D-2D a partir de información histórica hidrosedimentológica y de niveles de operación de la central. A partir del modelo se analizaron alternativas para la adaptación y remoción de sedimentos dentro del embalse. La sedimentación en Porce II se caracteriza por un delta de depositación avanzando longitudinalmente y por unas barras/diques laterales que generan una represión del flujo en los brazos de afluentes secundarios, estas características fueron bien representadas por el modelo bidimensional. Dentro del proceso de calibración se destaca el uso del factor de aceleración morfológica, comúnmente usado para reducir el tiempo de computo de simulaciones morfodinámicas de largo plazo en cuerpos de agua con comportamientos cíclicos definidos. En este trabajo se observó una buena representación al aplicarlo a escenarios donde las condiciones de frontera no son periódicas, siempre que se seleccione adecuadamente la escala temporal. Además, se encontró relevancia en la definición de parámetros asociados al flujo turbulento y a la rugosidad del lecho en la simulación de cambios batimétricos. Los resultados de la modelación evidenciaron la influencia del descenso de niveles, durante la operación de la central, para mantener la comunicación con los brazos de afluentes secundarios. Además, sugirieron mayor efectividad en alternativas de remoción cuando la evacuación de sedimentos se da en cercanías al delta de depositación. (Texto tomado de la fuente)
dc.description.abstractThe sedimentation process reduces reservoir lifespan and represents a threat to the sustainability of hydropower, which represents 70% of the installed capacity in Colombia. In this thesis, morphological spatio-temporal dynamics of bed and principal transport processes of sediments inside the tropical reservoir Porce II in Antioquia, Colombia, was studied. For this purpose, the two-dimensional hydro-morphodynamic model Delft3D-2D was calibrated and validated based on historical hydro-sedimentological information and hydroelectric operating levels. Also, adaptation and removal sediment reservoir strategies were analyzed. The sedimentation process in Porce II is characterized by a delta, which advances in a longitudinal way and by lateral barriers, that generates flow repression on the secondary affluents. The proposed model configuration has a proper representation of those characteristics. A morphological acceleration factor was included in the calibration process, commonly used to reduce the computational requirements for long-term morphodynamic simulations in defined cyclical behavior of water bodies. Here it is demonstrated that this factor could be used in simulations whit non-periodical boundary conditions, holding the model accuracy as long as the time scale is selected correctly. In addition, the selected parameters related to turbulent fluxes and the reservoir bottom roughness play an essential role in improving the model skill. The presented results show the influence of the reservoir levels to keep the communication with the secondary affluents. Besides, the results suggest greater effectiveness in removal alternatives when sediment evacuation occurs near the delta.
dc.format.extentvi, 103 páginas
dc.format.mimetypeapplication/pdf
dc.language.isospa
dc.publisherUniversidad Nacional de Colombia
dc.rights.urihttp://creativecommons.org/licenses/by-nc/4.0/
dc.subject.ddc620 - Ingeniería y operaciones afines
dc.titleModelación numérica bidimensional de la dinámica de sedimentación en un embalse tropical.
dc.typeTrabajo de grado - Maestría
dc.type.driverinfo:eu-repo/semantics/masterThesis
dc.type.versioninfo:eu-repo/semantics/acceptedVersion
dc.publisher.programMedellín - Minas - Maestría en Ingeniería - Recursos Hidráulicos
dc.coverage.regionAntioquia, Colombia
dc.description.degreelevelMaestría
dc.description.degreenameMagíster en Ingeniería - Recursos Hidráulicos
dc.description.researchareaHidráulica e Hidrodinámica
dc.identifier.instnameUniversidad Nacional de Colombia
dc.identifier.reponameRepositorio Institucional Universidad Nacional de Colombia
dc.identifier.repourlhttps://repositorio.unal.edu.co/
dc.publisher.departmentDepartamento de Geociencias y Medo Ambiente
dc.publisher.facultyFacultad de Minas
dc.publisher.placeMedellín, Colombia
dc.publisher.branchUniversidad Nacional de Colombia - Sede Medellín
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dc.rights.accessrightsinfo:eu-repo/semantics/openAccess
dc.subject.lembWater-power electric plants
dc.subject.lembCentrales hidroeléctricas
dc.subject.lembSedimentation and deposition
dc.subject.proposalMorfodinámica
dc.subject.proposalLimnología tropical
dc.subject.proposalModelación numérica
dc.subject.proposalSedimentación
dc.subject.proposalTropical limnology
dc.subject.proposalNumerical modeling
dc.subject.proposalSedimentation
dc.subject.proposalMorphodynamic
dc.title.translatedTwo-dimensional numerical model of sedimentation dynamics in a tropical reservoir.
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