Stream regularization index. A morphometric approach to quantify the longitudinal profile regularization stage

Jiménez Cantizano, Francisco Abel y Antón, Loreto . (2023) Stream regularization index. A morphometric approach to quantify the longitudinal profile regularization stage. Geomorphology 424, 2023, 108580

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Título Stream regularization index. A morphometric approach to quantify the longitudinal profile regularization stage
Autor(es) Jiménez Cantizano, Francisco Abel
Antón, Loreto
Materia(s) Geología
Abstract Fluvial systems carve the Earth's surface under the influence of climate and tectonics. This process tends towards dynamic equilibrium conditions, in which rivers respond by regularizing their longitudinal profiles to a graded form. However, external forcings frequently interrupt this trend displacing the system to a transient state from which the system will evolve again with a tendency towards a graded form. In bedrock incising rivers, the longitudinal profile shape provides information on transient states, and quantifying the regularization level makes it possible to establish inferences about a river's evolutionary trend and its relationship with the influencing external forcings. This work presents a procedure for quantifying the regularization level of streams from the analysis of the shape of the longitudinal profiles. This procedure involves quantifying of the departure of the current shape of the longitudinal profile from that representing the graded long profile under dynamic equilibrium conditions. This comparison is quantified by two indices: ‘stream regularization index_G’, calculated for the entire long profile, and ‘regularization index_g’, calculated discretely along the long profile. To illustrate the usefulness of the indices and how they respond in different fluvial contexts and evolutionary stages, the longitudinal profiles of 14 streams from the central area of the Iberian Peninsula were analyzed. The results are interpreted together with the area-slope graph and the Ksn index, which corroborated the usefulness of this technique as a morphometric tool for quantifying the river maturity and identify tectonic regime transitions.
Palabras clave streams
regularization index
morphometric analysis
longitudinal profile
stream regularization
Iberian Peninsula
Editor(es) Elsevier
Fecha 2023-01-05
Formato application/pdf
Identificador bibliuned:DptoCA-FCIE-Articulos-Fajimenez
http://e-spacio.uned.es/fez/view/bibliuned:DptoCA-FCIE-Articulos-Fajimenez
DOI - identifier https://doi.org/10.1016/j.geomorph.2022.108580
ISSN - identifier 0169-555X
Nombre de la revista Geomorphology
Número de Volumen 424
Publicado en la Revista Geomorphology 424, 2023, 108580
Idioma eng
Versión de la publicación publishedVersion
Tipo de recurso Article
Derechos de acceso y licencia http://creativecommons.org/licenses/by/4.0
info:eu-repo/semantics/openAccess
Tipo de acceso Acceso abierto
Notas adicionales The registered version of this article, first published in Geomorphology, is available online at the publisher's website: Elsevier, https://doi.org/10.1016/j.geomorph.2022.108580
Notas adicionales La versión registrada de este artículo, publicado por primera vez en Geomorphology, está disponible en línea en el sitio web del editor: Elsevier, https://doi.org/10.1016/j.geomorph.2022.108580

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Creado: Thu, 26 Jan 2023, 00:22:14 CET