Geologic versus wildfire controls on hillslope processes and debris flow initiation in the Green River canyons of Dinosaur National Monument

Larsen, Isaac J.; Pederson, Joel L.; Schmidt, John C.

doi:10.1016/j.geomorph.2006.04.002

Cited by 70 publications

(56 citation statements)

References 45 publications

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“…For channels that begin at the bedrock/colluvial contact, entrainment occurs during a "firehose effect" where water-rich runoff from gulleys in bedrock cliffs pours on downslope colluvium. The firehose effect has been described in many previous studies (e.g., Fryxell and Horberg, 1943;Johnson and Rodine, 1984;Coe et al, 1997;Glancy and Bell, 2000;Larsen et al, 2006;Godt and Coe, 2007), although the actual mechanics of the process are poorly understood. Our new insights into this process are that high antecedent moisture levels are not required for the initiation of debris flows and that the location of the entrainment sites can change as a function of the conditions of sediment supply (see discussion of 5th order channels later in this section).…”

Section: Discussion -Debris Flow Initiationmentioning

confidence: 87%

Initiation conditions for debris flows generated by runoff at Chalk Cliffs, central Colorado

2008

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Section: Discussion -Debris Flow Initiationmentioning

confidence: 87%

Initiation conditions for debris flows generated by runoff at Chalk Cliffs, central Colorado

2008

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“…Debris flows, also, are able to be initiated by mobilization of a channel bed due to surface water flow (Takahashi, 1991;Iverson, 1997). The surface water runoff erodes and entrains hillslope and channel materials (Larsen et al, 2006), and thus surface runoff is also an important process in high mountainous regions due to the concentration of overland flow upstream of the source areas (Berti et al, 1999). The TRIGRS runoff module provides the amount of runoff discharge considering infiltration and flow direction.…”

Section: Prediction Of Debris Flow Routesmentioning

confidence: 99%

Landslide and debris flow susceptibility zonation using TRIGRS for the 2011 Seoul landslide event

Park

Nikhil

Lee

2013

Nat. Hazards Earth Syst. Sci.

135

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Abstract. This paper presents the results from the application of a regional, physically based stability model: Transient Rainfall Infiltration and Grid-based Regional Slope-stability analysis (TRIGRS) for a region on Woomyeon Mountain, Seoul, South Korea. This model couples an infinite-slope stability analysis with a one-dimensional analytical solution to predict the transient pore pressure response to the infiltration of rainfall. TRIGRS also adopts the geographic information system (GIS) framework for determining the whole behaviour of a slope. In this paper, we suggest an index for evaluating the results produced by the model. Particular attention is devoted to the prediction of routes of debris flow, using a runoff module.In this context, the paper compares observed landslide and debris flow events with those predicted by the TRIGRS model. The TRIGRS model, originally developed to predict shallow landslides, has been extended in this study for application to debris flows. The results predicted by the TRIGRS model are presented as safety factor (FS) maps corresponding to transient rainfall events, and in terms of debris flow paths using methods proposed by several researchers in hydrology.In order to quantify the effectiveness of the model, we proposed an index called LR class (landslide ratio for each predicted FS class). The LR class index is mainly applied in regions where the landslide scar area is not well defined (or is unknown), in order to avoid overestimation of the model results. The use of the TRIGRS routing module was proposed to predict the paths of debris flow, especially in areas where the rheological properties and erosion rates of the materials are difficult to obtain. Although an improvement in accuracy is needed, this module is very useful for preliminary spatio-temporal assessment over wide areas. In summary, the TRIGRS model is a powerful tool of use to decision makers for susceptibility mapping, particularly when linked with various advanced applications using GIS spatial functions.

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“…There is a close relationship between extreme precipitation events and the occurrence of debris flows as some authors pointed out (Kapusta et al (2010), Fussgänger and Jadroň (2001), Kopecký (2001), Chen (2006) and Larsen et al (2006). It can be connected with climate changes (Larsson, 1982;Addison, 1987;Zimmermann, Haeberli, 1992;Deline et al, 2004;Jomelli, 2004;Pavlova, 2011).…”

Section: Debris Flow Hazards and Their Relation To Clime Changes And mentioning

confidence: 88%

Impact of Water-Induced Processes on the Development of Tarns and Their Basins in the High Tatras

Tomko-Králo

Hreško

Jakab

2017

Ekológia (Bratislava)

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Tomko-Králo D., Hreško J., Jakab I.: Impact of water-induced processes on development of the tarns and their basins in the High Tatras. Ekológia (Bratislava), Vol. 36, No. 3, p. 247-267, 2017. In the report we concentrate on the influences of water-induced morphodynamic processes and surface flow on the development of tarns in alpine environment conditions of selected valleys in the High Tatras. Model areas are represented by higher basins parts in the Malá Studená valley and the Veľká Studená valley, where we confirmed that slope-gravitational processes in the form of rockfall, water-gravitational processes in the form of debris flows, but also fluvial-proluvial processes as the accumulation of the soft fractions from the area of debris cones take part in the material deposition in the tarns. In this context we focused on the creation of the model of spatial distribution of the water-induced potential of material deposition in drainage tarn basins. The model includes three basic factors: slope and curvature of the relief and land cover character. Map processing with GIS technologies was done on the basis of a 3-D relief model, which allowed the locating of the local erosion bases areas, where the material could be accumulated. The achieved results confirmed the hypothesis that tarn basin development of the alpine environment is subordinated to permanent backfilling as a consequence of the cumulative influence of the several processes connected with rainfall and the runoff regime of the drainage basins.

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Geologic versus wildfire controls on hillslope processes and debris flow initiation in the Green River canyons of Dinosaur National Monument

Cited by 70 publications

References 45 publications

Initiation conditions for debris flows generated by runoff at Chalk Cliffs, central Colorado

Initiation conditions for debris flows generated by runoff at Chalk Cliffs, central Colorado

Landslide and debris flow susceptibility zonation using TRIGRS for the 2011 Seoul landslide event

Impact of Water-Induced Processes on the Development of Tarns and Their Basins in the High Tatras

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