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Numerical and Physical Modelling of a Bottom Outlet Stilling Basin Without Impact Element

Author(s): Angel Gasso Sanchez; David Lopez Gomez; Juan Jose Rebollo Cillan; Luis Balairon Perez

Linked Author(s): Ángel Gassó Sánchez

Keywords: Numerical models; Physical models; SPH; Stilling basin

Abstract: The design of stilling basins has been frequently studied since the development of physical models. Depending on the design of the bottom outlet and the water level downstream of the stilling basin during flood events, the mouth of the outlet can be submerged or emerged. In the specific case of emerged bottom outlets, to dissipate properly the energy the design usually included impact elements, such as blocks or baffle piers, with reduced lifespan due to erosion problems. As an indicative example, the Type VI stilling basin developed by the U. S. Bureau of Reclamation includes a vertical hanging baffle. The development of numerical models allows to study a wider range of solutions, even without direct impact elements and analyze its behavior with more precision. Nevertheless, physical models are needed to ensure that the results of the numerical model are appropriate. In this paper the study of the solution adopted for the Loteta Dam (Spain) is presented.

DOI: https://doi.org/10.64697/978-90-835589-7-4_41WC-P1897-cd

Year: 2025

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