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Water 2016, 8(3), 68; doi:10.3390/w8030068

Scour, Velocities and Pressures Evaluations Produced by Spillway and Outlets of Dam

Department of Civil Engineering, Universidad Politécnica de Cartagena, Paseo Alfonso XIII, 52, 30203 Cartagena, Spain
These authors contributed equally to this work.
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Author to whom correspondence should be addressed.
Academic Editor: Clelia Marti
Received: 11 November 2015 / Revised: 8 February 2016 / Accepted: 17 February 2016 / Published: 23 February 2016
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Abstract

Paute-Cardenillo (owned by Celec Ep-Hidropaute) is a dam with maximum height 135 m located in the Paute River in Ecuador. Its hydroelectric production will be integrated at the National Electric System of Ecuador with an installed capacity of 600 MW which will produce 3300 GWh per year. To evaluate the stability and safety of the structure, it is necessary to ascertain the shape and dimensions of the scour generated downstream from the dam. We studied the scour, due to the operation of the free surface spillway (700 m3/s) and half-height outlets (1760 m3/s), with three complementary procedures: empirical formulae obtained in models and prototypes, semi-empirical methodology based on pressure fluctuations-erodibility index and computational fluid dynamics simulations. The free surface weir could generate a scour around 21 m, while the intermediate outlet could reach the intact rock, located 34 m below the initial river bed. A pre-excavated basin is proposed and the velocities and pressures are analyzed. The results demonstrated the suitability of combining different methodologies to achieve an adequate resolution of this complex phenomenon. View Full-Text
Keywords: CFD simulation; erodibility methodology; falling jets; plunge pool; scour dam CFD simulation; erodibility methodology; falling jets; plunge pool; scour dam
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Castillo, L.G.; Carrillo, J.M. Scour, Velocities and Pressures Evaluations Produced by Spillway and Outlets of Dam. Water 2016, 8, 68.

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