Abstract
The coastline throughout the world and Colombia shows a retreat trend, with significant impacts on local communities and ecosystems. To address this problem, it was proposed to include it in Disaster Risk Management, a process-based approach that starts from knowledge to take corrective and prospective measures, being the hazard and vulnerability analysis the main input, and the evaluation of its components relevant for the proposal of alternatives. For this study, the dominance of each of the components of the hazard assessment (occurrence, magnitude and susceptibility) and vulnerability (exposed elements, fragility and lack of resilience) proposed by Coca-Domínguez and Ricaurte-Villota (2019) was analyzed using principal component analysis. The results show that the determining factor of the erosion hazard in the Pacific and the Insular zone is occurrence, while in the Caribbean it is susceptibility, which may be conditioned by the generalized trend of retreat of the Colombian coastline, while in the Caribbean it is explained by the characteristics of the coast. Vulnerability in the Caribbean and the Insular zone is determined by the lack of resilience, and in the Pacific by fragility, explained by the loss of traditional knowledge and ecosystems, moreover of differences in development and occupation between the Caribbean and the Colombian Pacific.
Highlights
The coastline throughout the world and Colombia shows a retreat trend, with significant impacts on local communities and ecosystems
The results show that the determining factor of the erosion hazard in the Pacific and the Caribbean Insular region is the Occurrence, which may be conditioned by the generalized trend of coastline retreat in these zones, while in the continental Caribbean region, it is Susceptibility, which is explained by the geological and geomorphological characteristics of this coast
Y RICAURTE-VILLOTA, C., "Validation of the hazard and vulnerability analysis of coastal erosion in the Caribbean and pacific coast of Colombia"
Summary
Grupo 1 2 3 4 5 espaciales estandarizadas, según lo descrito en Santamaría-del-Ángel et al (2019), usando una transformación Z (ecuación 1). Para ver las co-variabilidades y asociaciones de las variables que definen la amenaza y la vulnerabilidad en cada región, a los datos de anomalías espaciales estandarizadas, se les aplicó un PCA en su resolución numérica, siguiendo los criterios de Santamaría-del-Ángel et al (2011 y 2021), donde se utilizó la regla de Kaiser, seleccionando solo los componentes con eigenvalores mayores o iguales a 1 (Kaiser 1958; Yeomans y Golder 1982; Ferré 1995; Kanyongo 2005; Schreiber 2021). El análisis LDA para la amenaza (tabla 2) mostró que, del total de estaciones para las regiones Pacífico y Caribe Continental, solo estuvieron bien clasificadas el 71 y 79%, respectivamente. El 88% de las estaciones de la región Caribe insular estuvieron bien clasificadas.
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