The Model for Dilution Process of Landslide Triggered Debris Flow —A Case of Guanba River in Tibet Southeastern Plateau
Understanding and modeling the downstream dilution process of a landslide triggered debris flow is the foundation for recognizing the boundary condition and dilution mechanism of this type of debris flow, and this serves as the theoretical basis for the categorized control of viscous debris flows, d...
- Autores:
-
Li, Jun
Chen, Ningsheng
- Tipo de recurso:
- Article of journal
- Fecha de publicación:
- 2018
- Institución:
- Universidad Nacional de Colombia
- Repositorio:
- Universidad Nacional de Colombia
- Idioma:
- spa
- OAI Identifier:
- oai:repositorio.unal.edu.co:unal/68580
- Acceso en línea:
- https://repositorio.unal.edu.co/handle/unal/68580
http://bdigital.unal.edu.co/69613/
- Palabra clave:
- 55 Ciencias de la tierra / Earth sciences and geology
Debris flows
Dilution characteristic and process
Evaluation model
Guanba River
Southeastern Tibetan Plateau
flujo de escombros
procesos y características de dilución
modelo de evaluación
río Guanba
sureste del altiplano tibetano
- Rights
- openAccess
- License
- Atribución-NoComercial 4.0 Internacional
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dc.title.spa.fl_str_mv |
The Model for Dilution Process of Landslide Triggered Debris Flow —A Case of Guanba River in Tibet Southeastern Plateau |
title |
The Model for Dilution Process of Landslide Triggered Debris Flow —A Case of Guanba River in Tibet Southeastern Plateau |
spellingShingle |
The Model for Dilution Process of Landslide Triggered Debris Flow —A Case of Guanba River in Tibet Southeastern Plateau 55 Ciencias de la tierra / Earth sciences and geology Debris flows Dilution characteristic and process Evaluation model Guanba River Southeastern Tibetan Plateau flujo de escombros procesos y características de dilución modelo de evaluación río Guanba sureste del altiplano tibetano |
title_short |
The Model for Dilution Process of Landslide Triggered Debris Flow —A Case of Guanba River in Tibet Southeastern Plateau |
title_full |
The Model for Dilution Process of Landslide Triggered Debris Flow —A Case of Guanba River in Tibet Southeastern Plateau |
title_fullStr |
The Model for Dilution Process of Landslide Triggered Debris Flow —A Case of Guanba River in Tibet Southeastern Plateau |
title_full_unstemmed |
The Model for Dilution Process of Landslide Triggered Debris Flow —A Case of Guanba River in Tibet Southeastern Plateau |
title_sort |
The Model for Dilution Process of Landslide Triggered Debris Flow —A Case of Guanba River in Tibet Southeastern Plateau |
dc.creator.fl_str_mv |
Li, Jun Chen, Ningsheng |
dc.contributor.author.spa.fl_str_mv |
Li, Jun Chen, Ningsheng |
dc.subject.ddc.spa.fl_str_mv |
55 Ciencias de la tierra / Earth sciences and geology |
topic |
55 Ciencias de la tierra / Earth sciences and geology Debris flows Dilution characteristic and process Evaluation model Guanba River Southeastern Tibetan Plateau flujo de escombros procesos y características de dilución modelo de evaluación río Guanba sureste del altiplano tibetano |
dc.subject.proposal.spa.fl_str_mv |
Debris flows Dilution characteristic and process Evaluation model Guanba River Southeastern Tibetan Plateau flujo de escombros procesos y características de dilución modelo de evaluación río Guanba sureste del altiplano tibetano |
description |
Understanding and modeling the downstream dilution process of a landslide triggered debris flow is the foundation for recognizing the boundary condition and dilution mechanism of this type of debris flow, and this serves as the theoretical basis for the categorized control of viscous debris flows, diluted debris flows, hyperconcentration flows and flash floods in a drainage basin. In this study, taking as an example a typical debris flow that occurred in the Guanba River on Tibet’s southeastern plateau on July 6th, 1998, empirical models are used to calculate the density, water flow discharge, debris flow discharge, average depth of loose materials and channel gradient at 11 cross-sections upstream to downstream in the debris flow. On this basis, the dilution characteristics and debris flow dilution process are analyzed in this study. According to the correlation between the debris flow density and the water-soil ratio and channel gradient, we have established the density evaluation model for the debris flow dilution process, which can predict the dilution process of a landslide triggered debris flow. The study results include the following four aspects: (1) The key factors in the dilution process of landslide triggered debris flows are the water flow discharge, average depth of loose materials and channel gradient. (2) The debris flow dilution characteristics in the Guanba River in 1998 include the occurrence of the debris flow dilution process after a significant increase in the water-soil ratio; an increase in the proportion of fine particles after dilution of the debris flow; and the size distribution of grain is “narrowed.” (3) In accordance with the density and dilution characteristics, the debris flow dilution process in the Guanba River can be divided into the upstream viscous debris flow section, midstream and downstream transitional debris flow section and downstream diluted debris flow section. (4) The density evaluation model for the debris flow dilution process is expressed by the Lorentz equation, and this model can reflect the debris flow dilution process such that the debris flow density will decrease gradually with an increase in the water-soil ratio and decrease in channel gradient. The density evaluation model for the debris flow dilution process has been verified by three debris flow cases, which include Gaoqiao Gully, Haizi Valley, and Aizi Valley |
publishDate |
2018 |
dc.date.issued.spa.fl_str_mv |
2018-04-01 |
dc.date.accessioned.spa.fl_str_mv |
2019-07-03T07:11:17Z |
dc.date.available.spa.fl_str_mv |
2019-07-03T07:11:17Z |
dc.type.spa.fl_str_mv |
Artículo de revista |
dc.type.coar.fl_str_mv |
http://purl.org/coar/resource_type/c_2df8fbb1 |
dc.type.driver.spa.fl_str_mv |
info:eu-repo/semantics/article |
dc.type.version.spa.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.coar.spa.fl_str_mv |
http://purl.org/coar/resource_type/c_6501 |
dc.type.coarversion.spa.fl_str_mv |
http://purl.org/coar/version/c_970fb48d4fbd8a85 |
dc.type.content.spa.fl_str_mv |
Text |
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http://purl.org/redcol/resource_type/ART |
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http://purl.org/coar/resource_type/c_6501 |
status_str |
publishedVersion |
dc.identifier.issn.spa.fl_str_mv |
ISSN: 2339-3459 |
dc.identifier.uri.none.fl_str_mv |
https://repositorio.unal.edu.co/handle/unal/68580 |
dc.identifier.eprints.spa.fl_str_mv |
http://bdigital.unal.edu.co/69613/ |
identifier_str_mv |
ISSN: 2339-3459 |
url |
https://repositorio.unal.edu.co/handle/unal/68580 http://bdigital.unal.edu.co/69613/ |
dc.language.iso.spa.fl_str_mv |
spa |
language |
spa |
dc.relation.spa.fl_str_mv |
https://revistas.unal.edu.co/index.php/esrj/article/view/68177 |
dc.relation.ispartof.spa.fl_str_mv |
Universidad Nacional de Colombia Revistas electrónicas UN Earth Sciences Research Journal Earth Sciences Research Journal |
dc.relation.references.spa.fl_str_mv |
Li, Jun and Chen, Ningsheng (2018) The Model for Dilution Process of Landslide Triggered Debris Flow —A Case of Guanba River in Tibet Southeastern Plateau. Earth Sciences Research Journal, 22 (2). pp. 103-111. ISSN 2339-3459 |
dc.rights.spa.fl_str_mv |
Derechos reservados - Universidad Nacional de Colombia |
dc.rights.coar.fl_str_mv |
http://purl.org/coar/access_right/c_abf2 |
dc.rights.license.spa.fl_str_mv |
Atribución-NoComercial 4.0 Internacional |
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http://creativecommons.org/licenses/by-nc/4.0/ |
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info:eu-repo/semantics/openAccess |
rights_invalid_str_mv |
Atribución-NoComercial 4.0 Internacional Derechos reservados - Universidad Nacional de Colombia http://creativecommons.org/licenses/by-nc/4.0/ http://purl.org/coar/access_right/c_abf2 |
eu_rights_str_mv |
openAccess |
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application/pdf |
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Universidad Nacional de Colombia - Sede Bogotá - Facultad de Ciencias - Departamento de Geociencia |
institution |
Universidad Nacional de Colombia |
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https://repositorio.unal.edu.co/bitstream/unal/68580/1/68177-391094-1-PB.pdf https://repositorio.unal.edu.co/bitstream/unal/68580/2/68177-391094-1-PB.pdf.jpg |
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spelling |
Atribución-NoComercial 4.0 InternacionalDerechos reservados - Universidad Nacional de Colombiahttp://creativecommons.org/licenses/by-nc/4.0/info:eu-repo/semantics/openAccesshttp://purl.org/coar/access_right/c_abf2Li, Jun504cfa35-4781-49e3-9d74-72d2c5ce2cde300Chen, Ningshengf7a2a925-7f8f-4a64-a7ff-1094ada8b0473002019-07-03T07:11:17Z2019-07-03T07:11:17Z2018-04-01ISSN: 2339-3459https://repositorio.unal.edu.co/handle/unal/68580http://bdigital.unal.edu.co/69613/Understanding and modeling the downstream dilution process of a landslide triggered debris flow is the foundation for recognizing the boundary condition and dilution mechanism of this type of debris flow, and this serves as the theoretical basis for the categorized control of viscous debris flows, diluted debris flows, hyperconcentration flows and flash floods in a drainage basin. In this study, taking as an example a typical debris flow that occurred in the Guanba River on Tibet’s southeastern plateau on July 6th, 1998, empirical models are used to calculate the density, water flow discharge, debris flow discharge, average depth of loose materials and channel gradient at 11 cross-sections upstream to downstream in the debris flow. On this basis, the dilution characteristics and debris flow dilution process are analyzed in this study. According to the correlation between the debris flow density and the water-soil ratio and channel gradient, we have established the density evaluation model for the debris flow dilution process, which can predict the dilution process of a landslide triggered debris flow. The study results include the following four aspects: (1) The key factors in the dilution process of landslide triggered debris flows are the water flow discharge, average depth of loose materials and channel gradient. (2) The debris flow dilution characteristics in the Guanba River in 1998 include the occurrence of the debris flow dilution process after a significant increase in the water-soil ratio; an increase in the proportion of fine particles after dilution of the debris flow; and the size distribution of grain is “narrowed.” (3) In accordance with the density and dilution characteristics, the debris flow dilution process in the Guanba River can be divided into the upstream viscous debris flow section, midstream and downstream transitional debris flow section and downstream diluted debris flow section. (4) The density evaluation model for the debris flow dilution process is expressed by the Lorentz equation, and this model can reflect the debris flow dilution process such that the debris flow density will decrease gradually with an increase in the water-soil ratio and decrease in channel gradient. The density evaluation model for the debris flow dilution process has been verified by three debris flow cases, which include Gaoqiao Gully, Haizi Valley, and Aizi ValleyEl entendimiento y modelado del proceso de dilución aguas abajo del flujo de escombros causado por deslizamientos de tierra es fundamental para el reconocimiento de las condiciones límite y el mecanismo de dilución de este tipo de flujos, además de ser útil como base teórica para el control categorizado de la viscosidad de los escombros, detritos diluidos, flujos hiperconcentrados e inundaciones súbitas en una cuenca de desagüe. En este estudio, al tomar como ejemplo un flujo de detritos típico en el río Guanba, en el sureste del altiplano tibetano, del 6 de julio de 1998, se utilizaron modelos empíricos para calcular la densidad, la descarga de agua, la descarga de detritos, la profundidad promedio de materiales sueltos y la gradiente del canal en once secciones cruzadas desde aguas arriba y hacia abajo. Con base en estos datos, se analizan las características de dilución y el proceso de dilución del flujo de escombros. De acuerdo con la correlación entre la densidad del flujo de escombros y el índice agua-suelo más el gradiente del canal, se estableció el modelo de evaluación de densidad para el proceso de dilución del flujo de escombross, el cual puede predecir el proceso de dilución de un flujo causado por un deslizamiento de tierra. Los resultados del estudio incluyen los siguientes cuatro aspectos: (1) Los factores clave en la dilución de flujos de escombross causados por deslizamientos de tierra son la descarga de agua, la profundidad promedio de los materiales sueltos, y la gradiente del canal. (2) Las características de dilución del flujo de detritos en el río Guanba en 1998 incluye la ocurrencia del proceso de dilución después de un incremento significativo en el índice agua-suelo, un incremento en la proporción de partículas finas después de la dilución de los detritos, mientras la distribución por tamaños del grano es "reducida". (3) De acuerdo con las características de densidad y dilución, el proceso de dilución de detritos en el río Guanba se puede dividir entre la viscosidad de los detritos aguas arriba, el flujo transicional de detritos en el centro de la corriente y aguas abajo, y la sección de detritos diluidos aguas abajo. (4) El modelo de evaluación de densidad para el proceso de dilución del flujo de detritos se expresa con la ecuación de Lorentz, y es este modelo el que puede reflejar el proceso de dilución de forma que el flujo de escombros disminuye gradualmente con el incremento del índice agua-suelo y el decrecimiento de la gradiente de canal. El modelo de evaluación de densidad para el proceso de dilución del flujo se verificó con tres casos de flujos, que incluyen el Gaoqiao Gully, el valle Haizi y el valle Aizi.application/pdfspaUniversidad Nacional de Colombia - Sede Bogotá - Facultad de Ciencias - Departamento de Geocienciahttps://revistas.unal.edu.co/index.php/esrj/article/view/68177Universidad Nacional de Colombia Revistas electrónicas UN Earth Sciences Research JournalEarth Sciences Research JournalLi, Jun and Chen, Ningsheng (2018) The Model for Dilution Process of Landslide Triggered Debris Flow —A Case of Guanba River in Tibet Southeastern Plateau. Earth Sciences Research Journal, 22 (2). pp. 103-111. ISSN 2339-345955 Ciencias de la tierra / Earth sciences and geologyDebris flowsDilution characteristic and processEvaluation modelGuanba RiverSoutheastern Tibetan Plateauflujo de escombrosprocesos y características de diluciónmodelo de evaluaciónrío Guanbasureste del altiplano tibetanoThe Model for Dilution Process of Landslide Triggered Debris Flow —A Case of Guanba River in Tibet Southeastern PlateauArtículo de revistainfo:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501http://purl.org/coar/resource_type/c_2df8fbb1http://purl.org/coar/version/c_970fb48d4fbd8a85Texthttp://purl.org/redcol/resource_type/ARTORIGINAL68177-391094-1-PB.pdfapplication/pdf2883699https://repositorio.unal.edu.co/bitstream/unal/68580/1/68177-391094-1-PB.pdf7ba222aeede99d645c3631a577511fa7MD51THUMBNAIL68177-391094-1-PB.pdf.jpg68177-391094-1-PB.pdf.jpgGenerated Thumbnailimage/jpeg8130https://repositorio.unal.edu.co/bitstream/unal/68580/2/68177-391094-1-PB.pdf.jpgf65e046e5b034555d99b1e770e2c3679MD52unal/68580oai:repositorio.unal.edu.co:unal/685802024-05-27 23:09:39.053Repositorio Institucional Universidad Nacional de Colombiarepositorio_nal@unal.edu.co |