Cálculo de la transformación lluvia-escorrentía mediante un modelo Saint Venant 2Dvalidación mediante datos de campo y laboratorio

Abstract

The current PhD thesis is set within the context of the study of application of 2D distributed models to rainfall-runoff transformations. Although the application of two-dimensional models to surface runoff modeling is now a reality, the use of models that use the complete Saint Venant 2D equations (SWE 2D or 2D dynamic wave) to the entire runoff process, rather than simplified versions of them, is still incipient and object of study. This thesis also deals with the study of two other relevant aspects in the modeling of rainfall-runoff events, such as how to include urban obstacles in the model and the influence of the spacial distribution of precipitation in this kind of simulations. The work carried out includes the validation of a Saint Venant 2D model for laboratory artificial basins (specially designed for this thesis) on which different urban configurations and precipitation events are developed. It also validates the model of two well-developed real basins: an urban basin of 12 ha in Galicia (Spain) and a rural basin of 24 km2 in the experimental basin of Walnut Gulch in Arizona (USA). The sensitivity of the model to different parameters and approximations has been evaluated, and the uncertainty of the model for each case has been assessed.