EvaluaciĆ³n de riesgo de inundaciĆ³n por desborde del estero Bellavista
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Fecha
2020
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es
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Universidad AndrƩs Bello
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Licencia CC
Licencia CC
Resumen
Este trabajo tiene como objetivo la evaluaciĆ³n de los riesgos de inundaciĆ³n en el sector de Bellavista,
comuna de TomĆ©, RegiĆ³n del BiobĆo, Chile. Para ello ha sido empleada de forma combinada y
complementaria una valoraciĆ³n de peligrosidad en base a los resultados de un estudio de
modelizaciĆ³n hidrolĆ³gica-hidrĆ”ulica (AlarcĆ³n, 2019) y una valoraciĆ³n de vulnerabilidad y exposiciĆ³n
de la zona urbana en base a un anĆ”lisis multicriterio mediante Sistemas de InformaciĆ³n GeogrĆ”fica
(SIG). En Paralelo se llevĆ³ a cabo un anĆ”lisis de la marea como factor condicionante en el desarrollo
de estas inundaciones considerando que la localidad de Bellavista se encuentra prĆ³xima a la
desembocadura de la cuenca costera.
Los resultados obtenidos han permitido elaborar cartografĆas que muestran la distribuciĆ³n espacial
de los niveles de peligro, riesgo, vulnerabilidad y exposiciĆ³n ante inundaciones fluviales para toda
la zona urbana de Bellavista y han permitido analizar la influencia del mar como factor
condicionante.
Este trabajo evidencia un alto nivel de riesgo de inundaciĆ³n para las zonas habitadas de Bellavista,
demostrando la necesidad de una correcta ordenaciĆ³n del territorio y de la adopciĆ³n de una serie
de medidas con el fin de minimizar el nivel de riesgo por inundaciĆ³n y sus efectos.
The objective of this work is to evaluate the flood risks in the Bellavista sector, TomĆ© commune, BiobĆo Region, Chile. For this, a hazard assessment based on the results of a hydrological-hydraulic modeling study (AlarcĆ³n, 2019) and an assessment of vulnerability and exposure of the urban area based on a multi-criteria analysis using a multi-criteria analysis have been used in a combined and complementary way. Geographic Information Systems (GIS). In Parallel, a tidal analysis was carried out as a conditioning factor in the development of these floods, considering that the town of Bellavista is close to the mouth of the coastal basin. The obtained results have allowed the elaboration of cartographies that show the spatial distribution of the levels of risk before river floods for the entire urban area of Bellavista and have allowed the analysis of the influence of the sea as a conditioning factor. This work evidences a high level of flood risk for the inhabited areas of Bellavista that present a high level of flood risk, demonstrating the need for proper land use planning and the adoption of a series of measures in order to minimize the flood risk level and its effects.
The objective of this work is to evaluate the flood risks in the Bellavista sector, TomĆ© commune, BiobĆo Region, Chile. For this, a hazard assessment based on the results of a hydrological-hydraulic modeling study (AlarcĆ³n, 2019) and an assessment of vulnerability and exposure of the urban area based on a multi-criteria analysis using a multi-criteria analysis have been used in a combined and complementary way. Geographic Information Systems (GIS). In Parallel, a tidal analysis was carried out as a conditioning factor in the development of these floods, considering that the town of Bellavista is close to the mouth of the coastal basin. The obtained results have allowed the elaboration of cartographies that show the spatial distribution of the levels of risk before river floods for the entire urban area of Bellavista and have allowed the analysis of the influence of the sea as a conditioning factor. This work evidences a high level of flood risk for the inhabited areas of Bellavista that present a high level of flood risk, demonstrating the need for proper land use planning and the adoption of a series of measures in order to minimize the flood risk level and its effects.
Notas
Tesis (GeĆ³logo)
Palabras clave
Control de Inundaciones, EvaluaciĆ³n, Chile