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Reduction of the Hazard Level Due to Hyperconcentrated Flows in a Dry Creek Applying FLO-2D Modeling

Roberto Talledo, Sergio Cardoso, Leonardo Castillo, and Sissi Santos
Peruvian University of Applied Sciences/Civil Engineering, Lima, Perú

Manuscript received December 9, 2020; revised March 20, 2021; accepted May 8, 2021;issue published May 20, 2021

Abstract—In the face of an event of mud or debris flow in a dry creek, a reduction of the hazard level was sought through hyperconcentrated flow modeling in FLO-2D. Among the software requirements, the characterization of the hydrology, topography, geology and geotechnics of the stream was required. In addition, it was necessary to establish the Manning "n" roughness for the zone within the simulation and the rheological parameters that represented the behavior of the fluid. Three methodologies were used for calibration, which validated the contribution of the research. The FLO-2D model showed values of flow depths and flow velocities, which were necessary for the elaboration of the hazard map. As a mitigation measure, the placement of dykes in the stream bed was considered to analyze flow depths, velocities, and the hazard level. Among the results obtained, it was observed that, in the urban zone, the area corresponding to a medium and high level of hazard was reduced by 59.8% and 96.1%, respectively. In conclusion, the placement of dykes in the creek significantly reduced the level of hazard generated by a hyperconcentrated flow.

Index Terms— FLO-2D, hyperconcentrated flow, hazard map, mitigation measure and dry creek

Cite: Roberto Talledo, Sergio Cardoso, Leonardo Castillo, and Sissi Santos, "Reduction of the Hazard Level Due to Hyperconcentrated Flows in a Dry Creek Applying FLO-2D Modeling," International Journal of Structural and Civil Engineering Research, Vol. 10, No. 2, pp. 85-91, May 2021. doi: 10.18178/ijscer.10.2.85-91

​Copyright © 2021 by the authors. This is an open access article distributed under the Creative Commons Attribution License (CC BY-NC-ND 4.0), which permits use, distribution and reproduction in any medium, provided that the article is properly cited, the use is non-commercial and no modifications or adaptations are made.