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Performance of HEC-RAS v6.5 at basin scale for calculating the flow hydrograph: comparison with TUFLOW

Author

Listed:
  • Pasqualino Artiglieri

    (University of Calabria)

  • Giuseppe Curulli

    (University of Calabria)

  • Francesco Coscarella

    (University of Calabria)

  • Danilo Algieri Ferraro

    (University of Calabria)

  • Francesco Macchione

    (University of Calabria)

Abstract

This study investigates the efficiency of the HEC-RAS v6.5 hydrodynamic model at basin scale in calculating flow hydrographs, comparing its performance with the TUFLOW model. The research examines the Fosso di Mare basin in Calabria, Italy, by using structured grids with varying resolutions (5 m, 10 m, and 20 m). The study evaluates the impact of grid resolution on the accuracy of flood hydrographs generated by HEC-RAS, using results generated with TUFLOW as benchmarks. The results indicate that the peak flow computed using HEC-RAS estimates decreases with lower grid resolutions, while the time of the peak flow increases, suggesting the occurrence of a numerical storage effect within the computational domain. TUFLOW demonstrates more stability and requires significantly less computational time, making it suitable for large-scale studies. This research offers valuable insights for hydraulic design and flood risk assessments, particularly in regions with limited resources for commercial hydrodynamic models.

Suggested Citation

  • Pasqualino Artiglieri & Giuseppe Curulli & Francesco Coscarella & Danilo Algieri Ferraro & Francesco Macchione, 2025. "Performance of HEC-RAS v6.5 at basin scale for calculating the flow hydrograph: comparison with TUFLOW," 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. 121(8), pages 9477-9490, May.
    • Handle: RePEc:spr:nathaz:v:121:y:2025:i:8:d:10.1007_s11069-025-07170-x
    DOI: 10.1007/s11069-025-07170-x
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    1. Dhruvesh P. Patel & Jorge A. Ramirez & Prashant K. Srivastava & Michaela Bray & Dawei Han, 2017. "Assessment of flood inundation mapping of Surat city by coupled 1D/2D hydrodynamic modeling: a case application of the new HEC-RAS 5," 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. 89(1), pages 93-130, October.
    2. Vasilis Bellos & Ino Papageorgaki & Ioannis Kourtis & Harris Vangelis & Ioannis Kalogiros & George Tsakiris, 2020. "Reconstruction of a flash flood event using a 2D hydrodynamic model under spatial and temporal variability of storm," 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. 101(3), pages 711-726, April.
    3. Pierfranco Costabile & Francesco Macchione & Luigi Natale & Gabriella Petaccia, 2015. "Flood mapping using LIDAR DEM. Limitations of the 1-D modeling highlighted by the 2-D approach," 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. 77(1), pages 181-204, May.
    4. Georgia Siakara & Nikolaos Gourgouletis & Evangelos Baltas, 2024. "Assessing the Efficiency of Fully Two-Dimensional Hydraulic HEC-RAS Models in Rivers of Cyprus," Geographies, MDPI, vol. 4(3), pages 1-24, August.
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