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Comparison Between Two Hydrodynamic Models for Flooding Simulations at River Lima Basin

Author

Listed:
  • José Pinho
  • Rui Ferreira
  • Luís Vieira
  • Dirk Schwanenberg

Abstract

According to EU flood risks directive, flood hazard maps should include information on hydraulic characteristics of vulnerable locations, i.e. the inundated areas, water depths and velocities. These features can be assessed by the use of advanced hydraulic modelling tools which are presented in this paper based on a case study in the river Lima basin, Portugal. This river includes several flood-prone areas. Ponte Lima town is one of the places of higher flood risk. The upstream dams can lower the flood risks if part of its storage capacity is allocated for mitigating flood events. However, proper management of dam releases and the evaluation of downstream river flows should be considered for preventing flood damages. A hydrological and a one-dimensional hydrodynamic model were implemented, and at a particular flood-prone town, inundation was assessed using a two-dimensional model. The hydrological model is based on the well known Sacramento model. For this purpose, two different modelling implementations were analysed: a model based on a finite element mesh and a model based on rectangular grids. The computational performance of the two modelling implementations is evaluated. Historical flood events were used for model calibration serving as a basis for the establishment of different potential flood scenarios. Intense precipitation events in the river’s basin and operational dam releases are determinant for the occurrence of floods at vulnerable downstream locations. The inundation model based on the unstructured mesh reveals to be more computationally efficient if high spatial resolution is required. A new combination of software tools for floods simulation is presented including an efficient alternative for simulation of 2-D inundation using a finite element mesh instead of a grid. Copyright Springer Science+Business Media Dordrecht 2015

Suggested Citation

  • José Pinho & Rui Ferreira & Luís Vieira & Dirk Schwanenberg, 2015. "Comparison Between Two Hydrodynamic Models for Flooding Simulations at River Lima Basin," Water Resources Management: An International Journal, Published for the European Water Resources Association (EWRA), Springer;European Water Resources Association (EWRA), vol. 29(2), pages 431-444, January.
    • Handle: RePEc:spr:waterr:v:29:y:2015:i:2:p:431-444
    DOI: 10.1007/s11269-014-0878-6
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    References listed on IDEAS

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    1. S. Shahapure & T. Eldho & E. Rao, 2010. "Coastal Urban Flood Simulation Using FEM, GIS and Remote Sensing," Water Resources Management: An International Journal, Published for the European Water Resources Association (EWRA), Springer;European Water Resources Association (EWRA), vol. 24(13), pages 3615-3640, October.
    2. George Tsakiris & Vasilis Bellos, 2014. "A Numerical Model for Two-Dimensional Flood Routing in Complex Terrains," Water Resources Management: An International Journal, Published for the European Water Resources Association (EWRA), Springer;European Water Resources Association (EWRA), vol. 28(5), pages 1277-1291, March.
    3. C. Sharma & A. Mishra & S. Panda, 2014. "Assessing Impact of Flood on River Dynamics and Susceptible Regions: Geomorphometric Analysis," Water Resources Management: An International Journal, Published for the European Water Resources Association (EWRA), Springer;European Water Resources Association (EWRA), vol. 28(9), pages 2615-2638, July.
    4. Liu, Wen & Chen, Weiping & Peng, Chi, 2014. "Assessing the effectiveness of green infrastructures on urban flooding reduction: A community scale study," Ecological Modelling, Elsevier, vol. 291(C), pages 6-14.
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    2. Nicholas Zmijewski & Andrea Bottacin-Busolin & Anders Wörman, 2016. "Incorporating Hydrologic Routing into Reservoir Operation Models: Implications for Hydropower Production Planning," Water Resources Management: An International Journal, Published for the European Water Resources Association (EWRA), Springer;European Water Resources Association (EWRA), vol. 30(2), pages 623-640, January.
    3. Ismail Haltas & Gokmen Tayfur & Sebnem Elci, 2016. "Two-dimensional numerical modeling of flood wave propagation in an urban area due to Ürkmez dam-break, İzmir, Turkey," Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, Springer;International Society for the Prevention and Mitigation of Natural Hazards, vol. 81(3), pages 2103-2119, April.
    4. Nicholas Zmijewski & Andrea Bottacin-Busolin & Anders Wörman, 2016. "Incorporating Hydrologic Routing into Reservoir Operation Models: Implications for Hydropower Production Planning," Water Resources Management: An International Journal, Published for the European Water Resources Association (EWRA), Springer;European Water Resources Association (EWRA), vol. 30(2), pages 623-640, January.

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