Tsunami hazard assessments in mucipality of San Andrés of Tumaco, Colombian Pacific, using information LiDAR
DOI:
https://doi.org/10.26640/22159045.241Keywords:
San Andrés de Tumaco, tsunami, numerical modeling, sea level, LIDAR, Seismic activityAbstract
Was estimated the tsunami hazard in the urban area of the municipality San Andres of Tumaco, from the numerical simulation of scenarios based on real events of 1979 tsunami that affected significantly the municipality. Detallad bathymetry was used 15 m spatial resolution (multibeam) and information LiDAR (Light Detection and Ranging), which can represent with en accuracy of 130 cm in the vertical plana and 130 m in the horizontal plana of terrain altimetry study area, according to data acquired by DIMAR. The results indicate that the El scenario simulated with Macroseismic and lides parameters, identical to the scenario used to develop the official map of the municipality in 2004, caused significant changes in flood areas urban area. The tsunami arrival time varios on average between 20 and 18 minutes. Finally a comparison is made between the 2004 and 2012 maps of tsunami inundation in the municipality, finding Tumaco Island, with about 88% Flood Map 2004, presents flood 96% in map 2012, representing more than 100,000 m 2of flooded area in the island. The determination of tsunami inundation scenarios contributes to reducing the vulnerability of the residents of coastal areas to natural event, since it is a basic tool for formulating contingency plans tsunami municipal and allow National Unity Risk Management derision-making concerning the management of disasters, plans tsunami response training and the development of mitigation strategies.Downloads
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