Climate or tectonics? What controls the spatial-temporal variations in erosion rates across the Eastern Cordillera of Colombia?

García-Delgado, Helbert; Villamizar-Escalante, Nicolás; Bermúdez, Mauricio A.; Bernet, Matthias; Velandia, Francisco

doi:10.1016/j.gloplacha.2021.103541

Cited by 11 publications

(4 citation statements)

References 166 publications

(270 reference statements)

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“…Exhumation along strike-slip fault terminations, some related to transpression, have been studied by Spotila et al (2007a, b), J o u r n a l P r e -p r o o f Cruz et al (2007), Furlong (2007, Umhoefer et al (2007), Bermúdez et al (2010;, and Cochran et al (2017). Our research constitutes another example of exhumation along a transpressive system where tectonics is the main driver for the exhumation (García-Delgado et al, 2021).…”

Section: Introductionmentioning

confidence: 62%

Cenozoic exhumation patterns in the northern Andes: Constraints from the southern Bucaramanga Fault, Eastern Cordillera, Colombia

Velandia

Bermúdez

Kohn

et al. 2021

Journal of South American Earth Sciences

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Section: Introductionmentioning

confidence: 62%

Cenozoic exhumation patterns in the northern Andes: Constraints from the southern Bucaramanga Fault, Eastern Cordillera, Colombia

Velandia

Bermúdez

Kohn

et al. 2021

Journal of South American Earth Sciences

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“…In turn, the exhumation rates were recorded by Velandia [69] and Amaya et al [70] of approximately 0.3 km/Ma from approximately 25 Ma ago. As a parallel process to the exhumation of the rock massif, the weathering of the rocks is generated by pressure relief, where igneous and metamorphic rocks present a decompression by lithostatic load, which produces a fracturing by expansion or dilation of the rocks along the surfaces approximately parallel to the ground [71].…”

Section: Discussionmentioning

confidence: 99%

Morphometric Evaluation and Its Incidence in the Mass Movements Present in the Chicamocha Canyon, Colombia

Ortiz

Martínez-Graña

2023

Sustainability

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The dynamic behavior of the basins evaluated by their morphometric parameters establishes a relationship with the endogenous and exogenous factors of the earth that control the modeling of the rocky massif by weathering and erosion processes. The characterization of these relationships can define the degree of affectation of the surfaces and the agents that control them as a categorical element in the definition of scenarios within the planning of physical and natural territory. This evaluation considers parameters contained within the characterization of the relief, shape and texture of the drainage and the mobility of the flow in the basin. As a result of this evaluation, three factors were obtained that control the processes in the basins: a tectonic structural factor followed by climate control and, finally, seismic activity that plays an important role in the mechanical weathering of surfaces. The correlation of these factors showed that the Umpalá, Guaca, Río Negro, Cantabara and La Cureña basins display a high degree of physical and mechanical weathering of the rocky massif and that the Manco, Talarcuta, Las Pavas, Felisco and El Abra basins are more likely to generate torrential flows. The joint evaluation of these parameters provides a useful tool to understand the dynamic behavior of basins and their impact on anthropogenic setting.

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“…Its climate corresponds to a subtropical humid forest and humid tropical hydrometeorological conditions (Aristizábal et al, 2017). The rainfall in the study zone shows a bimodal distribution peaking between April-May and October (García-Delgado et al, 2021). The available meteorological stations represent the pluviometric phenomena in the study area.…”

Section: Study Area and Data Sourcesmentioning

confidence: 99%

An integral assessment of landslide dams generated by the occurrence of rainfall-induced landslide and debris flow hazard chain

Ortiz-Giraldo,

Botero,

Vega

2023

Front. Earth Sci.

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Landslides caused by rainfall are one of the most frequent causes of disasters in tropical countries and mountainous terrain and can block rivers generating landslide dams. This paper presents a methodology for the estimation of the obstruction of water streams generated by rainfall-induced shallow landslides. The spatial distribution of the landslide hazard was estimated in terms of the Factor of Safety (FoS) values using the deterministic method with physical basis SLIDE (Slope - Infiltration - Distributed Equilibrium). The rainfall regimes of the study area were estimated by means of a simple scaling Log Normal Model. Subsequently, the resulting areas with a high hazard level that could detach and reach the riverbed were identified as sources for the simulation of the debris flow runout using the Rapid Mass Movement Simulation model with its debris flow module, (i.e., RAMMS-DF), estimating zones of the riverbed that should be analyzed in detail. Finally, the effects of river channel obstructions generated after debris flow movement were analyzed by means of the Iber, a well-known, physically based 2D hydraulic model and their possible changes on the river hydraulic. In order to generate a workflow that allows the application of the SLIDE methodology and the preparation of inputs for the subsequent processes of debris flow propagation and hydraulic modeling of the river corridor of analysis, a Python-based toolbox was created. Our results highlight the changes in the fluvial dynamics in the corridor of the river of analysis after the landslide dams generated by the occurrence of rainfall-induced landslide and debris flow hazard chain for the different return periods. In all cases, the material deposited in the river channel was sufficient to change the hydraulic regime of the river corridor, showing longer delay times in the transit of the flow, in addition to the decrease in the specific flow. This would imply a water shortage in the study basin of the hydroelectric project; however, in the scope of this project it is not possible to really determine the real effects that could be generated by this event.

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Climate or tectonics? What controls the spatial-temporal variations in erosion rates across the Eastern Cordillera of Colombia?

Cited by 11 publications

References 166 publications

Cenozoic exhumation patterns in the northern Andes: Constraints from the southern Bucaramanga Fault, Eastern Cordillera, Colombia

Cenozoic exhumation patterns in the northern Andes: Constraints from the southern Bucaramanga Fault, Eastern Cordillera, Colombia

Morphometric Evaluation and Its Incidence in the Mass Movements Present in the Chicamocha Canyon, Colombia

An integral assessment of landslide dams generated by the occurrence of rainfall-induced landslide and debris flow hazard chain

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