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dc.contributor.authorAadland, Tore
dc.contributor.authorHelland-Hansen, William
dc.date.accessioned2020-02-24T13:11:32Z
dc.date.available2020-02-24T13:11:32Z
dc.date.issued2019-01-29
dc.description.abstractWe present a compilation of modern shoreline progradation rates measured close to river outlets entering deltaic coastlines, and we discuss how these observations relate to the overall evolution of both modern and ancient deltaic coastlines. We analyzed Landsat‐derived satellite images to identify plan view changes in the subaerial morphology of 331 modern deltaic coastlines. Our rate compilation (km2/year) had a lognormal distribution with parameters <i>μ</i> = −1.85 and <i>σ</i><sup>2</sup> = 1.01. We found that the rate data could be predicted to within an order of magnitude by an empirically derived power law using only fluvial water discharge and suspended sediment load as input parameters (<sup><i>r</sup></i><sub>pro</sub>=10<sup>-2.3</sup><i>Q</i><sup>0</sup><sub>w</sub><sup>59</sup><i>Q</i><sup>0</sup><sub>s</sub><sup>34</sup>). We justified this river‐centric model of our progradation rates by assuming that delta progradation rates measured close to river outlets were more reflective of fluvial processes than of basinal processes, and preliminary tests supported this assumption. Our rate compilation and empirical model could provide useful constraints to guide stratigraphic analysis of ancient source‐to‐sink systems and to build analog and numerical models.en_US
dc.identifier.citationAadland T, Helland-Hansen W. Progradation rates measured at modern river outlets: A first-order constraint on the pace of deltaic deposition. Journal of Geophysical Research (JGR): Earth Surface. 2019;124(2):347-364en_US
dc.identifier.cristinIDFRIDAID 1691622
dc.identifier.doi10.1029/2018JF004750
dc.identifier.issn2169-9003
dc.identifier.issn2169-9011
dc.identifier.urihttps://hdl.handle.net/10037/17458
dc.language.isoengen_US
dc.publisherAmerican Geophysical Union (AGU)en_US
dc.relation.journalJournal of Geophysical Research (JGR): Earth Surface
dc.relation.projectIDNorges forskningsråd: 228107en_US
dc.relation.projectIDinfo:eu-repo/grantAgreement/RCN/PETROSENTR/228107/Norway/Research Centre for Arctic Petroleum Exploration/ARCEx/en_US
dc.rights.accessRightsopenAccessen_US
dc.rights.holder©2019. American Geophysical Unionen_US
dc.subjectVDP::Mathematics and natural science: 400::Geosciences: 450en_US
dc.subjectVDP::Matematikk og Naturvitenskap: 400::Geofag: 450en_US
dc.titleProgradation rates measured at modern river outlets: A first-order constraint on the pace of deltaic depositionen_US
dc.type.versionpublishedVersionen_US
dc.typeJournal articleen_US
dc.typeTidsskriftartikkelen_US
dc.typePeer revieweden_US


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