Articles | Volume 22, issue 2
https://doi.org/10.5194/nhess-22-377-2022
https://doi.org/10.5194/nhess-22-377-2022
Research article
 | 
10 Feb 2022
Research article |  | 10 Feb 2022

A modeling methodology to study the tributary-junction alluvial fan connectivity during a debris flow event

Alex Garcés, Gerardo Zegers, Albert Cabré, Germán Aguilar, Aldo Tamburrino, and Santiago Montserrat

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Cited articles

Aguilar, G., Carretier, S., Regard, V., Vassallo, R., Riquelme, R., and Martinod, J.: Grain size-dependent 10Be concentrations in alluvial stream sediment of the Huasco Valley, a semi-arid Andes region, Quatern. Geochronol., 19, 163–172, https://doi.org/10.1016/j.quageo.2013.01.011, 2014. a
Aguilar, G., Cabré, A., Fredes, V., and Villela, B.: Erosion after an extreme storm event in an arid fluvial system of the southern Atacama Desert: an assessment of the magnitude, return time, and conditioning factors of erosion and debris flow generation, Nat. Hazards Earth Syst. Sci., 20, 1247–1265, https://doi.org/10.5194/nhess-20-1247-2020, 2020. a, b, c, d, e
Ancey, C.: Plasticity and geophysical flows: a review, J. Non-Newtonian Fluid Mech., 142, 4–35, 2007. a
Bozkurt, D., Rondanelli, R., Garreaud, R., and Arriagada, A.: Impact of warmer eastern tropical pacific SST on the March 2015 atacama floods, Mon. Weather Rev., 144, 4441–4460, https://doi.org/10.1175/MWR-D-16-0041.1, 2016. a
Brunsden, D. and Thornes, J.: Landscape sensitivity and change, Trans. Inst. Brit. Geogr., 4, 463–484, 1979. a
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Short summary
We propose a workflow to model the response of an alluvial fan located in the Atacama Desert during an extreme storm event. For this alluvial fan, five different deposits were identified and associated with different debris flow surges. Using a commercial software program, our workflow concatenates these surges into one model. This study depicts the significance of the mechanical classification of debris flows to reproduce how an alluvial fan controls the tributary–river junction connectivity.
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