Browsing by Author "Aguirre C."

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    Characterization of Multi-Decadal Beach Changes in Cartagena Bay (Valparaíso, Chile) from Satellite Imagery
    (2024) Briceno de Urbaneja I.C.; Pardo-Pascual J.E.; Cabezas-Rabadan C.; Aguirre C.; Mártinez Reyes, Carolina Del Pilar; Perez-Martinez W.; Palomar-Vazquez J.
    Sandy coastlines are very dynamic spaces affected by a variety of natural and human factors. In Central Chile, changes in oceanographic and wave conditions, modes of inter-annual climate variability such as El Niño Southern Oscillation (ENSO), and extreme events such as earthquakes and tsunamis condition the beach morphology. At the same time, direct human actions alter the arrival of sediments to the coast and their alongshore distribution. Despite the relevance of the beaches for this coastal region and the interesting relationship their morphology has with the aforementioned factors, there is a lack of robust morphological datasets to provide a deep characterization and understanding of the dynamism of the Chilean coast. Based on the information provided by satellite-derived shorelines (SDSs) defined by using the SHOREX algorithm, this paper characterizes the morphological changes of Playa Grande in Cartagena Bay (Central Chile) during the period 1985–2019. The shoreline position data are analyzed in the context of changing beach transforming elements, allowing for a better understanding of the changes according to multiple drivers. While some of these factors, such as earthquakes or coastal storms, have a punctual character, changes in wave patterns vary at different time scales, from seasonal to multi-annual, linked to climate phases such as ENSO. Its effects are translated into shoreline erosion and accretion conditioned by the morphology and orientation of the coast while influenced by the availability of sediment in the coastal system. According to that, a conceptual model of the dynamism and redistribution of sediment in the Bay of Cartagena is proposed. The work proves the high utility that the systematic analysis of multi-decadal SDS datasets obtained from the images acquired in the optical by the Landsat and Sentinel-2 offer for beach monitoring and understanding the coastal dynamism.
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    Disciplinary inflections: Contesting three concepts for the construction of the post-neoliberal cityInflexiones disciplinares: disputando tres conceptos para la construcción de la ciudad posneoliberal
    (Pontificia Universidad Catolica de Chile 1, 2021) Encinas F.; Encinas F.; Truffello R.; Tironi M.; Truffello R.; Aguirre C.; Aguirre C.; Freed C.; Vergara-Perucich F.; Hidalgo R.; Tironi M.; CEDEUS (Chile)
    © 2021, Pontificia Universidad Catolica de Chile 1. All rights reserved.When words become fashionable, their use modifies their meaning. By understanding this performative condition, this text analyzes the current implications of the concepts of sustainability, resilience, and integration. Then, it argues the need to overcome the neoliberal city if we want these meanings to become real.
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    Respuesta y recuperación ante desastres: complejidades institucionales y técnicas en contextos de post-terremoto en Chile
    (Corporation for the Management and Reduction of Disaster Risk in Chile (GRID-Chile), 2023) Mella-Lira B.; Vigouroux, Orlando; Meneses Ferrada, Camilo Ignacio; Aguirre C.; Encinas Pino, Felipe; Bertholet, Patricio
    Los eventos sísmicos pueden causar un daño importante a inmuebles públicos y privados y son vital importancia para la gestión pública. En este contexto, es relevante reconocer los actores y los momentos críticos que experimentan las organizaciones que coordinan las labores de respuesta, rescate, recopilación de datos y deliberación de traslados. En Chile, la toma de decisiones sobre estos procesos involucra a tres ministerios: el Ministerio de Desarrollo Social recopila la información de las personas y las familias afectadas por la emergencia; el Ministerio de Vivienda y Urbanismo catastra información para asignar beneficios transitorios o definitivos de vivienda; y el Ministerio del Interior, quien a través del Servicio Nacional de Prevención y Respuesta ante Desastres (SENAPRED), planifica y coordina los recursos públicos y privados para gestionar el manejo de la emergencia. Al momento de la crisis se suman otros grupos: voluntarios, unidades de bomberos, carabineros, agrupaciones de la sociedad civil, empresas aseguradoras, entre otros. El artículo explora las complejidades institucionales y técnicas que participan de la primera respuesta luego de un sismo (ej. toma de datos, sistematización, análisis y toma de decisiones).