Transient river response, captured by channel steepness and its concavity

Mountain rivers draining tropical regions are known to be great conveyor belts carrying efficiently more than half of the global sediment flux to the oceans. Many tropical mountain areas are located in tectonically active belts where the hillslope and stream channel morphology are rapidly evolving i...

Πλήρης περιγραφή

Αποθηκεύτηκε σε:
Λεπτομέρειες βιβλιογραφικής εγγραφής
Κύριος συγγραφέας: Vanacker, Veerle (author)
Άλλοι συγγραφείς: Blanckenburg, F. von (author), Govers, Gerard (author), Molina, Armando (author), Campforts, B. (author), Kubik, P. W. (author)
Μορφή: article
Γλώσσα:eng
Έκδοση: 2015
Θέματα:
Διαθέσιμο Online:http://dspace.ucuenca.edu.ec/handle/123456789/22012
Ετικέτες: Προσθήκη ετικέτας
Δεν υπάρχουν, Καταχωρήστε ετικέτα πρώτοι!
_version_ 1839952752934912000
author Vanacker, Veerle
author2 Blanckenburg, F. von
Govers, Gerard
Molina, Armando
Campforts, B.
Kubik, P. W.
author2_role author
author
author
author
author
author_facet Vanacker, Veerle
Blanckenburg, F. von
Govers, Gerard
Molina, Armando
Campforts, B.
Kubik, P. W.
author_role author
collection Repositorio Universidad de Cuenca
dc.creator.none.fl_str_mv Vanacker, Veerle
Blanckenburg, F. von
Govers, Gerard
Molina, Armando
Campforts, B.
Kubik, P. W.
dc.date.none.fl_str_mv 2015-06-10T16:13:32Z
2015-06-10T16:13:32Z
2015-01-01
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.identifier.none.fl_str_mv http://dspace.ucuenca.edu.ec/handle/123456789/22012
doi: 10.1016/j.geomorph.2014.09.013
dc.language.none.fl_str_mv eng
dc.rights.none.fl_str_mv http://creativecommons.org/licenses/by-nc-sa/3.0/ec/
info:eu-repo/semantics/openAccess
dc.source.none.fl_str_mv reponame:Repositorio Universidad de Cuenca
instname:Universidad de Cuenca
instacron:UCUENCA
dc.subject.none.fl_str_mv Landscape Transience
River Longitudinal Profiles
Be-Derived Denudation Rates
Erosion Control
Tropical Andes
Ecuador
dc.title.none.fl_str_mv Transient river response, captured by channel steepness and its concavity
Geomorphology
dc.type.none.fl_str_mv info:eu-repo/semantics/publishedVersion
info:eu-repo/semantics/article
description Mountain rivers draining tropical regions are known to be great conveyor belts carrying efficiently more than half of the global sediment flux to the oceans. Many tropical mountain areas are located in tectonically active belts where the hillslope and stream channel morphology are rapidly evolving in response to changes in base level. Here, we report basin-wide denudation rates for an east–west transect through the tropical Andes. Hillslope and channel morphology vary systematically from east to west, reflecting the transition from high relief, strongly dissected topography in the escarpment zones into relatively low relief topography in the inter-Andean valley. The spatial pattern of differential denudation rates reflects the transient adjustment of the landscape to rapid river incision following tectonic uplift and river diversion. In the inter-Andean valley, upstream of the wave of incision, slopes and river channels display a relatively smooth, concave-up morphology and denudation rates (time scale of 104–105 a) are consistently low (3 to 200 mm/ka). In contrast, slopes and river channels of rejuvenated basins draining the eastern cordillera are steep to very steep; and the studied drainage basins show a wide range of denudation rate values (60 to 400 mm/ka) that increase systematically with increasing basin mean slope gradient, channel steepness, and channel convexity. Drainage basins that are characterised by strong convexities in their river longitudinal profiles systematically have higher denudation rates. As such, this is one of the first studies that provides field-based evidence of a correlation between channel concavity and basin mean denudation rates, consistent with process-based fluvial incision models.
eu_rights_str_mv openAccess
format article
id UCUENCA_b5faaf7b8467f4bcc24f36ad0e0e68aa
identifier_str_mv doi: 10.1016/j.geomorph.2014.09.013
instacron_str UCUENCA
institution UCUENCA
instname_str Universidad de Cuenca
language eng
network_acronym_str UCUENCA
network_name_str Repositorio Universidad de Cuenca
oai_identifier_str oai:dspace.ucuenca.edu.ec:123456789/22012
publishDate 2015
reponame_str Repositorio Universidad de Cuenca
repository.mail.fl_str_mv .
repository.name.fl_str_mv Repositorio Universidad de Cuenca - Universidad de Cuenca
repository_id_str 4186
rights_invalid_str_mv http://creativecommons.org/licenses/by-nc-sa/3.0/ec/
spelling Transient river response, captured by channel steepness and its concavityGeomorphologyVanacker, VeerleBlanckenburg, F. vonGovers, GerardMolina, ArmandoCampforts, B.Kubik, P. W.Landscape TransienceRiver Longitudinal ProfilesBe-Derived Denudation RatesErosion ControlTropical AndesEcuadorMountain rivers draining tropical regions are known to be great conveyor belts carrying efficiently more than half of the global sediment flux to the oceans. Many tropical mountain areas are located in tectonically active belts where the hillslope and stream channel morphology are rapidly evolving in response to changes in base level. Here, we report basin-wide denudation rates for an east–west transect through the tropical Andes. Hillslope and channel morphology vary systematically from east to west, reflecting the transition from high relief, strongly dissected topography in the escarpment zones into relatively low relief topography in the inter-Andean valley. The spatial pattern of differential denudation rates reflects the transient adjustment of the landscape to rapid river incision following tectonic uplift and river diversion. In the inter-Andean valley, upstream of the wave of incision, slopes and river channels display a relatively smooth, concave-up morphology and denudation rates (time scale of 104–105 a) are consistently low (3 to 200 mm/ka). In contrast, slopes and river channels of rejuvenated basins draining the eastern cordillera are steep to very steep; and the studied drainage basins show a wide range of denudation rate values (60 to 400 mm/ka) that increase systematically with increasing basin mean slope gradient, channel steepness, and channel convexity. Drainage basins that are characterised by strong convexities in their river longitudinal profiles systematically have higher denudation rates. As such, this is one of the first studies that provides field-based evidence of a correlation between channel concavity and basin mean denudation rates, consistent with process-based fluvial incision models.Cuencavolumen 2282015-06-10T16:13:32Z2015-06-10T16:13:32Z2015-01-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfapplication/pdfhttp://dspace.ucuenca.edu.ec/handle/123456789/22012doi: 10.1016/j.geomorph.2014.09.013enghttp://creativecommons.org/licenses/by-nc-sa/3.0/ec/info:eu-repo/semantics/openAccessreponame:Repositorio Universidad de Cuencainstname:Universidad de Cuencainstacron:UCUENCA2020-08-01T01:11:31Zoai:dspace.ucuenca.edu.ec:123456789/22012Institucionalhttp://dspace.ucuenca.edu.ec/Universidad públicahttps://www.ucuenca.edu.ec/http://dspace.ucuenca.edu.ec/oai.Ecuador...opendoar:41862025-08-09T03:56:19.426838Repositorio Universidad de Cuenca - Universidad de Cuencatrue
spellingShingle Transient river response, captured by channel steepness and its concavity
Vanacker, Veerle
Landscape Transience
River Longitudinal Profiles
Be-Derived Denudation Rates
Erosion Control
Tropical Andes
Ecuador
status_str publishedVersion
title Transient river response, captured by channel steepness and its concavity
title_full Transient river response, captured by channel steepness and its concavity
title_fullStr Transient river response, captured by channel steepness and its concavity
title_full_unstemmed Transient river response, captured by channel steepness and its concavity
title_short Transient river response, captured by channel steepness and its concavity
title_sort Transient river response, captured by channel steepness and its concavity
topic Landscape Transience
River Longitudinal Profiles
Be-Derived Denudation Rates
Erosion Control
Tropical Andes
Ecuador
url http://dspace.ucuenca.edu.ec/handle/123456789/22012