Limay Chico stream: An example of fluvial capture in the upper basin of the Limay River (SE of Neuquén)

A process of stream piracy caused by the active retrograde erosion of Limay Chico stream - a tributary of Limay river- is described. It is located in the southern part of headwaters of the Alicurá drainage basin, tributary of Collon Cura river. It is supposed that the increment of the headward erosi...

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Detalles Bibliográficos
Autor principal: Castro Godoy, Silvia Edith
Publicado: 2008
Materias:
Arroyo Alicurá
Headward erosion
Limay Chico
Stream piracy
fault scarp
fluvial geomorphology
fluvial process
headwater
river evolution
sediment transport
slope stability
stream channel
streamflow
terrace
tributary
Argentina
Limay Valley
South America
Cura
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00044822_v63_n1_p76_GonzalezDiaz
http://hdl.handle.net/20.500.12110/paper_00044822_v63_n1_p76_GonzalezDiaz
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id paper:paper_00044822_v63_n1_p76_GonzalezDiaz
record_format dspace
spelling paper:paper_00044822_v63_n1_p76_GonzalezDiaz2023-06-08T14:26:06Z Limay Chico stream: An example of fluvial capture in the upper basin of the Limay River (SE of Neuquén) Castro Godoy, Silvia Edith Arroyo Alicurá Headward erosion Limay Chico Stream piracy fault scarp fluvial geomorphology fluvial process headwater river evolution sediment transport slope stability stream channel streamflow terrace tributary Argentina Limay Valley South America Cura A process of stream piracy caused by the active retrograde erosion of Limay Chico stream - a tributary of Limay river- is described. It is located in the southern part of headwaters of the Alicurá drainage basin, tributary of Collon Cura river. It is supposed that the increment of the headward erosion is related to the postglacial climatic conditions and a coetaneous deepening of the Limay river channel, a process expressed by modern and lower erosion terraces. Moreover the retrograde erosion was enhanced by the special location of the Limay Chico valley along an important line of structural weakness, the Limay Chico fault. The fluvial capture and the consequent diversion of the Alicurá basin upper part showed previous favorable conditions: 1) the topographic lower disposition of Limay Chico stream and their base level; 2) its steeper slope and the location of Limay Chico valley along a zone of structural and litologicalk weakness; 3) transverse arrangement of the Alicurá river's headwaters; 4) its gentle slope and location of their basin and base level at a topographic higher level. Several wind gaps were recognized and were interpreted two probable elbows of capture and barbed pattern. Also the increment of discharge of Limay Chico stream caused in their basin local phenomena of static rejuvenation. It is suppose a close genetic relation between the landslides observed along the steep fault scarp promoted by the Limay Chico Fault and the postglacial climatic change and the local erosional deepening of Limay Chico valley. The slumps characterized by the coalescence of their scan, generated the irregular and ruged landscape of the western side of Limay Chico valley. On the eastern valley slope the slumps reach minor expression. Longitudinal profils and slopes of the analized streams are included. Fil:Castro Godoy, S. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2008 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00044822_v63_n1_p76_GonzalezDiaz http://hdl.handle.net/20.500.12110/paper_00044822_v63_n1_p76_GonzalezDiaz
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Arroyo Alicurá
Headward erosion
Limay Chico
Stream piracy
fault scarp
fluvial geomorphology
fluvial process
headwater
river evolution
sediment transport
slope stability
stream channel
streamflow
terrace
tributary
Argentina
Limay Valley
South America
Cura
spellingShingle Arroyo Alicurá
Headward erosion
Limay Chico
Stream piracy
fault scarp
fluvial geomorphology
fluvial process
headwater
river evolution
sediment transport
slope stability
stream channel
streamflow
terrace
tributary
Argentina
Limay Valley
South America
Cura
Castro Godoy, Silvia Edith
Limay Chico stream: An example of fluvial capture in the upper basin of the Limay River (SE of Neuquén)
topic_facet Arroyo Alicurá
Headward erosion
Limay Chico
Stream piracy
fault scarp
fluvial geomorphology
fluvial process
headwater
river evolution
sediment transport
slope stability
stream channel
streamflow
terrace
tributary
Argentina
Limay Valley
South America
Cura
description A process of stream piracy caused by the active retrograde erosion of Limay Chico stream - a tributary of Limay river- is described. It is located in the southern part of headwaters of the Alicurá drainage basin, tributary of Collon Cura river. It is supposed that the increment of the headward erosion is related to the postglacial climatic conditions and a coetaneous deepening of the Limay river channel, a process expressed by modern and lower erosion terraces. Moreover the retrograde erosion was enhanced by the special location of the Limay Chico valley along an important line of structural weakness, the Limay Chico fault. The fluvial capture and the consequent diversion of the Alicurá basin upper part showed previous favorable conditions: 1) the topographic lower disposition of Limay Chico stream and their base level; 2) its steeper slope and the location of Limay Chico valley along a zone of structural and litologicalk weakness; 3) transverse arrangement of the Alicurá river's headwaters; 4) its gentle slope and location of their basin and base level at a topographic higher level. Several wind gaps were recognized and were interpreted two probable elbows of capture and barbed pattern. Also the increment of discharge of Limay Chico stream caused in their basin local phenomena of static rejuvenation. It is suppose a close genetic relation between the landslides observed along the steep fault scarp promoted by the Limay Chico Fault and the postglacial climatic change and the local erosional deepening of Limay Chico valley. The slumps characterized by the coalescence of their scan, generated the irregular and ruged landscape of the western side of Limay Chico valley. On the eastern valley slope the slumps reach minor expression. Longitudinal profils and slopes of the analized streams are included.
author Castro Godoy, Silvia Edith
author_facet Castro Godoy, Silvia Edith
author_sort Castro Godoy, Silvia Edith
title Limay Chico stream: An example of fluvial capture in the upper basin of the Limay River (SE of Neuquén)
title_short Limay Chico stream: An example of fluvial capture in the upper basin of the Limay River (SE of Neuquén)
title_full Limay Chico stream: An example of fluvial capture in the upper basin of the Limay River (SE of Neuquén)
title_fullStr Limay Chico stream: An example of fluvial capture in the upper basin of the Limay River (SE of Neuquén)
title_full_unstemmed Limay Chico stream: An example of fluvial capture in the upper basin of the Limay River (SE of Neuquén)
title_sort limay chico stream: an example of fluvial capture in the upper basin of the limay river (se of neuquén)
publishDate 2008
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00044822_v63_n1_p76_GonzalezDiaz
http://hdl.handle.net/20.500.12110/paper_00044822_v63_n1_p76_GonzalezDiaz
work_keys_str_mv AT castrogodoysilviaedith limaychicostreamanexampleoffluvialcaptureintheupperbasinofthelimayriverseofneuquen
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