Modelación hidrológica distribuida basada en esquemas de volúmenes finitos
Distributed hydrological modeling occurs as a historical consequence of the different developments and advances in conceptual hydrology, first, through deepening and adaptation of hydrology through aggregated methods, and then discretizing these concepts to reach spatially distributed models. This t...
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| Tipo de recurso: | tesis doctoral |
| Fecha de publicación: | 2016 |
| País: | España |
| Institución: | Universitat Politècnica de Catalunya (UPC) |
| Repositorio: | UPCommons. Portal del coneixement obert de la UPC |
| Idioma: | español |
| OAI Identifier: | oai:upcommons.upc.edu:2117/98112 |
| Acceso en línea: | https://hdl.handle.net/2117/98112 https://dx.doi.org/10.5821/dissertation-2117-98112 |
| Access Level: | acceso abierto |
| Palabra clave: | Hidrologia Models hidrològics Àrees temàtiques de la UPC::Enginyeria civil |
| Sumario: | Distributed hydrological modeling occurs as a historical consequence of the different developments and advances in conceptual hydrology, first, through deepening and adaptation of hydrology through aggregated methods, and then discretizing these concepts to reach spatially distributed models. This thesis covers the implementation of a continuous hydrologic model (CHM), starting from the basis of the hydrodynamic model Iber, which uses finite volume schemes. The model developed in this research work is based on theoretical implementations founded on the principle of continuity to achieve a representation, although simplified in some respects, of the wholel hydrological cycle. In the process of modelling this cycle, the basin is represented by different cells or elements, among which the horizontal flow transfers occur, while within each one of them there is also a vertical transfer between the different layers. Other aspects in which special emphasis has been made is in the representation of the drying process, essential for accurate surface processes simulation, and in consideration of the mobility of the result of the research lluvia. As a result of the research, various proposals in terms of the characterization of the different types of flow and its cast are presented, always seeking a balance between maximum realism and simplicity in order to have an efficient tool. It is possible to predict the base flow in rural basins, always preserving the needs of calibration of the model, and based on conversion methods and adequation of input data. The hydraulic theoretical principle of the model are the two-dimensional Saint Venant equations, or shallow water equations, solved through finite volume numerical schemes, while the tool that was used as a starting point is the hydrodynamic model Iber. However, the model allows a simplification of kinematic wave conditions or diffusion wave, according to the scenario you are working. The hydrological theoretical principle is framed in the abcd model of Thomas implemented and adapted in this work at a distributed level. The resulting tool is then able to model in an efficient and accurate way, the processes of rainfall-runoff, the loss processes of evapotranspiration and infiltration with the most commonly used models, water transfer to aquifers and their storage, and their subsequent contribution to the surface flow. The method has been validated in various cases, theoretical ones and, after a process of calibration, real rural basins, where its flexibility, efficiency and utility has become clear. Finally, the use of an eminently hydraulic approximation for the simulation of hydrological processes opens the door to hydrologic-hydraulic integrated modeling. By using a single tool, it is possible to simulate the rainfall-runoff transformation, the losses processes and aquifer recharge, the generation of base flow, and the detailed description of hydrodynamics on the river channel or in flooded areas |
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