Evaluación del riesgo por inundaciones del río chicamocha en corrales (Boyacá), integrando la modelación hidrodinámica en HEC-RAS® con el conocimiento de actores sociales clave

Abstract

Flood risk was assessed for the Chicamocha River in the municipality of Corrales (Boyacá), integrating two-dimensional hydrodynamic modeling in HEC-RAS® version 6.6 with knowledge from key social actors, as the first detailed study at 1:10,000 scale for this reach. Flood hazard was characterized through hydrometeorological analysis, flow estimation, and modeling for return periods of 25, 50, and 100 years. Vulnerability was assessed following the UNGRD (2012) methodological guide for 25 exposed elements and seven inhabitants, six of whom were evaluated for the economic vulnerability factor, as the police officer was excluded given that the economic variables considered did not correspond to his profile. Results indicate flooded areas below 3% of the municipality, predominantly low total vulnerability, and high risk concentrated in bridges and crops. Community validation adjusted the modeled flood extents and identified undocumented historical hydraulic interventions. The resulting maps constitute technical inputs for updating the municipal Land Use Planning Scheme.