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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 Ni\u00f1o 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\u20132019. 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.<\/jats:p>","DOI":"10.3390\/rs16132360","type":"journal-article","created":{"date-parts":[[2024,6,27]],"date-time":"2024-06-27T13:26:43Z","timestamp":1719494803000},"page":"2360","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":12,"title":["Characterization of Multi-Decadal Beach Changes in Cartagena Bay (Valpara\u00edso, Chile) from Satellite Imagery"],"prefix":"10.3390","volume":"16","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-1722-636X","authenticated-orcid":false,"given":"Idania C.","family":"Brice\u00f1o de Urbaneja","sequence":"first","affiliation":[{"name":"H\u00e9mera Centro de Observaci\u00f3n de la Tierra, Facultad de Ciencias, Ingenier\u00eda y Tecnolog\u00eda, Universidad Mayor, Camino La Pir\u00e1mide 5750, Huechuraba 8580745, Chile"},{"name":"Geo-Environmental Cartography and Remote Sensing Group, Department of Cartographic Engineering, Geodesy and Photogrammetry, Universitat Polit\u00e8cnica de Val\u00e8ncia, Cam\u00ed de Vera s\/n, 46022 Val\u00e8ncia, Spain"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-0471-9795","authenticated-orcid":false,"given":"Josep E.","family":"Pardo-Pascual","sequence":"additional","affiliation":[{"name":"Geo-Environmental Cartography and Remote Sensing Group, Department of Cartographic Engineering, Geodesy and Photogrammetry, Universitat Polit\u00e8cnica de Val\u00e8ncia, Cam\u00ed de Vera s\/n, 46022 Val\u00e8ncia, Spain"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-0596-4920","authenticated-orcid":false,"given":"Carlos","family":"Cabezas-Rabad\u00e1n","sequence":"additional","affiliation":[{"name":"Geo-Environmental Cartography and Remote Sensing Group, Department of Cartographic Engineering, Geodesy and Photogrammetry, Universitat Polit\u00e8cnica de Val\u00e8ncia, Cam\u00ed de Vera s\/n, 46022 Val\u00e8ncia, Spain"},{"name":"Univ. Bordeaux, CNRS, Bordeaux INP, EPOC, UMR 5805, F-33600 Pessac, France"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9883-514X","authenticated-orcid":false,"given":"Catalina","family":"Aguirre","sequence":"additional","affiliation":[{"name":"Escuela de Ingenier\u00eda Oce\u00e1nica, Universidad de Valpara\u00edso, Av. Brasil 1786, Valpara\u00edso 2362844, Chile"},{"name":"Centro de Ciencia del Clima y la Resiliencia [FONDAP\/ANID 1523A0002], Blanco Encalada 2002, Santiago 8320000, Chile"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-7631-5311","authenticated-orcid":false,"given":"Carolina","family":"Mart\u00ednez","sequence":"additional","affiliation":[{"name":"Instituto de Geograf\u00eda, Facultad de Historia, Geograf\u00eda y Ciencia Pol\u00edtica, Pontificia Universidad Cat\u00f3lica de Chile, Campus San Joaqu\u00edn, Avda. Vicu\u00f1a Mackenna 4860, Macul 7820436, Chile"},{"name":"Centro de Investigaci\u00f3n para la Gesti\u00f3n Integrada del Riesgo de Desastres [CIGIDEN], Pontificia Universidad Cat\u00f3lica de Chile, Campus San Joaqu\u00edn, Avda. Vicu\u00f1a Mackenna 4860, Macul 7820436, Chile"},{"name":"Instituto Milenio en Socio-Ecolog\u00eda Costera [SECOS], Av. Libertador Bernardo O\u2019Higgins, 340, Santiago 8331150, Chile"},{"name":"Centro UC Observatorio de la Costa, Pontificia Universidad Cat\u00f3lica de Chile, Campus San Joaqu\u00edn, Avda. 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