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Analysis of the hydrological safety of dams combining two numerical tools: Iber and DualSPHysics

  • Special Column on SPHERIC2017 (Guest Editors Mou-bin Liu, Can Huang, A-man Zhang)
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Abstract

The upgrade of the hydrological safety of dams is a critical issue to avoid failures that can dramatically affect people and assets. This paper shows a numerical methodology to analyse the safety of the Belesar dam (NW, Spain) based on two different numerical codes. First, a mesh-based code named Iber, suited to deal with large 2-D domains, is used to simulate the impoundment. The initial conditions and the inlet provided to Iber correspond to the maximum water elevation and the maximum expected inflow to the impoundment defined in the technical specifications of the dam, which are associated to the more hazardous operation conditions of the dam. Iber provides information about the time needed for water to attain the crest of the dam when floodgates are closed. In addition, it also provides the velocity of discharge when gates are opened. Then, a mesh-free code named DualSPHysics, which is especially suited to deal with complex and violent 3-D flows, is used to reproduce the behaviour of one of the spillways of the dam starting from the results obtained with Iber, which are used as inlet conditions for DualSPHysics. The combined results of both model show that the left spillway can discharge the surplus of water associated to the maximum inflow to the reservoir if the gates of the spillways are opened before the overtopping of the dam was observed. In addition, water depth measured on the spillway is considerably lower than the lateral walls, preventing overtopping. Finally, velocities at different points of the spillway showed to be in good agreement with theoretical values.

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Acknowledgements

This work is partially supported under projects IMDROFLOOD (Water JPI-WaterWorks 2014), Programa de Consolidation e Estructuracion de Unidades de Investigation Competitivas (ED431C 2017/ 64) and Risc ML (Interreg Program, European Regional Development Fund, ERDF). One of the authors, A. J. C. C., is funded by a Ramon y Cajal grant of the Ministerio de Economia y Competitividad del Gobierno de Espana (RYC-2013-12617). One of us, J. G. C., wants to acknowledge Dr. Luis Cea for helpful discussions.

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Authors and Affiliations

  1. Environmental Physics Laboratory (EPHYSLAB), Universidade de Vigo, Campus AsLagoas, Orense, Spain

    J. González-Cao, O. García-Feal, J. M. Domínguez, A. J. C. Crespo & M. Gómez-Gesteira

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  1. J. González-Cao
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  2. O. García-Feal
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  3. J. M. Domínguez
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  4. A. J. C. Crespo
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  5. M. Gómez-Gesteira
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Correspondence to J. González-Cao.

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González-Cao, J., García-Feal, O., Domínguez, J.M. et al. Analysis of the hydrological safety of dams combining two numerical tools: Iber and DualSPHysics. J Hydrodyn 30, 87–94 (2018). https://doi.org/10.1007/s42241-018-0009-6

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  • DOI: https://doi.org/10.1007/s42241-018-0009-6

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