Articles | Volume 20, issue 7
Nat. Hazards Earth Syst. Sci., 20, 1919–1930, 2020
https://doi.org/10.5194/nhess-20-1919-2020
Nat. Hazards Earth Syst. Sci., 20, 1919–1930, 2020
https://doi.org/10.5194/nhess-20-1919-2020

Research article 03 Jul 2020

Research article | 03 Jul 2020

Sensitivity and identifiability of rheological parameters in debris flow modeling

Gerardo Zegers et al.

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Revised manuscript under review for NHESS
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Cited articles

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
Arattano, M., Franzi, L., and Marchi, L.: Influence of rheology on debris-flow simulation, Nat. Hazards Earth Syst. Sci., 6, 519–528, https://doi.org/10.5194/nhess-6-519-2006, 2006. a
Beven, K.: A manifesto for the equifinality thesis, J. Hydrol., 320, 18–36, 2006. a
Boniello, M. A., Calligaris, C., Lapasin, R., and Zini, L.: Rheological investigation and simulation of a debris-flow event in the Fella watershed, Nat. Hazards Earth Syst. Sci., 10, 989–997, https://doi.org/10.5194/nhess-10-989-2010, 2010. a, b
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, 2016. a, b
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We perform a sensitivity analysis on the parameters of a numerical debris flow model and examine the effects of using post-event measurements on two creeks in Chile. Our results demonstrate the utility of sensitivity analysis in debris flow modeling and the benefits of post-event observations on parameter identifiability. This study provides guidance on the choice of uncertain parameters, contributing to more reliable simulations for debris flow risk assessments and land use planning.
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