RT Journal Article
T1 An analysis of rheological models for lahar modelling with Iber
A1 Sanz-Ramos, Marcos
A1 Bladé, Ernest
A1 Díez Herrero, Andrés
A1 Vázquez Tarrio, Daniel
A1 Garrote Revilla, Julio
A1 Sánchez, Nieves
A1 Galindo, Ines
AB Lahars are destructive volcanic debris flows, composed of water and pyroclastic material, capable of traveling long distances at high velocities. Modelling their dynamics is critical for hazard assessment and risk mitigation, yet it remains complex due to factors such as parameter uncertainty, limited calibration data, and variable terrain topography. Current modelling approaches range from empirical methods to advanced depth-averaged numerical simulations, where flow resistance is typically represented through rheological models. Common formulations include the Manning equation, Voellmy friction model, and Bingham plastic rheology, each capturing different aspects of non-Newtonian flow behaviour. This study evaluates the performance of several rheological models in reconstructing the 2001 lahar event at Popocatépetl volcano (Mexico) using the enhanced non-Newtonian module of the Iber hydrodynamic modelling tool (Iber-NNF). Results show that model choice significantly affects simulation accuracy. Manning-like models performed poorly, highlighting the limitations of velocity-dependent resistance terms in capturing static flow behaviour.
PB Universidad Nacional Autónoma de México
YR 2025
FD 2025-12-01
LK https://hdl.handle.net/20.500.14352/128882
UL https://hdl.handle.net/20.500.14352/128882
LA eng
NO Sanz-Ramos, M., Bladé, E., Díez-Herrero, A., Vázquez-Tarrío, D., Garrote, J., Sánchez, N., & Galindo, I. (2025). An analysis of rheological models for lahar modelling with Iber. Revista Mexicana de Ciencias Geológicas, 42(3). https://doi.org/10.22201/igc.20072902e.2025.3.1882
NO CSIC
NO Gobierno de Canarias
NO Secretaría de Estado de Medio Ambiente
DS Docta Complutense
RD 18 dic 2025