Coastal Evolution in a Wetland Affected by Large Tsunamigenic Earthquakes in South-Central Chile: Criteria for Integrated Coastal Management

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dc.contributor.authorMartínez Reyes, Carolina Del Pilar
dc.contributor.authorSepúlveda-Zuñiga, Einer
dc.contributor.authorVillagrán, Mauricio
dc.contributor.authorRojas, Octavio
dc.contributor.authorGómez, Matias
dc.contributor.authorLópez, Pablo
dc.contributor.authorRojas Quezada, Carolina Alejandra
dc.contributor.otherCEDEUS (Chile)
dc.date.accessioned2024-01-10T14:22:40Z
dc.date.available2024-01-10T14:22:40Z
dc.date.issued2021
dc.description.abstractThe coastal evolution of the microtidal Tubul-Raqui wetland in south-central Chile (36 degrees S), which historically has been affected by large earthquakes and tsunamis, particularly the 1960 (Mw = 9.5) and 2010 (Mw = 8.8) subduction earthquakes and their associated tsunamis, is analyzed. Historical aerial photographs and topographic and bathymetric surveys from the 1961-2017 period, as well as salinity, sediment, and flora data obtained following the 2010 earthquake were used for comparison with data from prior to the event. A steady state of the shoreline was established, with an average erosion rate of -0.016 m/year in the 1961-2017 period. However, erosion predominated in the period between these two large earthquakes (1961-2009), with an average rate of -0.386 m/year. The wetland dried up, partially recovered saline intrusion a year later, and recovered the salinity conditions it had before the earthquake two years later. The postearthquake effects on the floristic composition were not significant, with the species Spartina densiflora, which presented a high tolerance to these types of changes, predominating. Moreover, 75 percent of the taxa in pre- and postearthquake conditions coincided, with the halophyte species Spartina densiflora, Sarcocornia fructicosa, and Cotula coronopifolia predominating, while the best-conserved community was Spartina-Sarcocornia association located in the saltmarsh. Seven years after the earthquake, the shoreline presented an accretion rate of 2.935 m/year; if the current tectonic conditions prevail, an erosive trend can be expected in the coming decades. The morphological variability and the changes associated with the shoreline in this wetland are strongly controlled by tectonic factors. Criteria aimed at integrated coastal management to promote its occupancy and use in accordance with its evolutionary dynamics are proposed.
dc.fechaingreso.objetodigital2024-05-23
dc.format.extent27 páginas
dc.fuente.origenWOS
dc.identifier.doi10.3390/w13111467
dc.identifier.eissn2073-4441
dc.identifier.scopusidSCOPUS_ID:85107397300
dc.identifier.urihttps://doi.org/10.3390/w13111467
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/79981
dc.identifier.wosidWOS:000660830600001
dc.information.autorucInstituto de Estudios Urbanos y Territoriales; Rojas Quezada, Carolina Alejandra; 0000-0001-9505-4252; 1085840
dc.information.autorucInstituto de Geografía; Martínez Reyes, Carolina Del Pilar; 0000-0002-7631-5311; 249883
dc.issue.numero11
dc.language.isoen
dc.nota.accesoContenido completo
dc.publisherMDPI
dc.revistaWater
dc.rightsacceso abierto
dc.rights.license CC BY 4.0 DEED Atribution 4.0 International
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/deed.en
dc.subjectCoastal evolution
dc.subjectGeomorphological change
dc.subjectWetland
dc.subjectEarthquakes
dc.subjectCoastal management
dc.subject.ddc550
dc.subject.deweyCiencias de la tierraes_ES
dc.subject.ods11 Sustainable Cities and Communities
dc.subject.odspa11 Ciudades y comunidades sostenibles
dc.titleCoastal Evolution in a Wetland Affected by Large Tsunamigenic Earthquakes in South-Central Chile: Criteria for Integrated Coastal Management
dc.typeartículo
dc.volumen13
sipa.codpersvinculados1085840
sipa.indexWOS
sipa.trazabilidadCarga SIPA;09-01-2024
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