Publicacións

@article{cea_implementation_2024,

title = {Implementation of a GPU-enhanced multiclass soil erosion model based on the 2D shallow water equations in the software Iber},

author = {Luis Cea-Gómez and Orlando García-Feal and Guillaume Nord and Guillaume Piton and Cédric Legoût},

url = {https://www.sciencedirect.com/science/article/pii/S1364815224001592},

doi = {10.1016/j.envsoft.2024.106098},

issn = {1364-8152},

year  = {2024},

date = {2024-08-01},

urldate = {2026-04-21},

journal = {Environmental Modelling & Software},

volume = {179},

pages = {106098},

abstract = {We present the implementation of a new fully distributed multiclass soil erosion module. The model is based on a 2D finite volume solver (Iber+) for the 2D shallow water equations that computes the overland flow water depths and velocities. From these, the model evaluates the transport of sediment particles due to bed load and suspended load, including rainfall-driven and runoff-driven erosion processes, and using well-established physically-based formulations. The evolution of the mass of sediment particles in the soil layer is computed from a mass conservation equation for each sediment class. The solver is implemented using High Performance Computing techniques that take advantage of the computational capabilities of standard Graphical Processing Units, achieving speed-ups of two orders of magnitude relative to a sequential implementation on the CPU. We show the application and validation of the model at different spatial scales, ranging from laboratory experiments to meso-scale catchments.},

keywords = {Distributed numerical modelling, High performance computing, Sediment transport, shallow water equations, Soil erosion},

pubstate = {published},

tppubtype = {article}

}

@article{costabile_evaluation_2024,

title = {Evaluation of 2D hydrodynamic-based rainfall/runoff modelling for soil erosion assessment at a seasonal scale},

author = {Pierfranco Costabile and Luis Cea-Gómez and Gabriele Barbaro and Carmelina Costanzo and Manel Llena and Damià Vericat},

url = {https://www.sciencedirect.com/science/article/pii/S0022169424001720},

doi = {10.1016/j.jhydrol.2024.130778},

issn = {0022-1694},

year  = {2024},

date = {2024-03-01},

urldate = {2026-04-01},

journal = {Journal of Hydrology},

volume = {632},

pages = {130778},

abstract = {Badlands are often the source of a significant fraction of the sediment reaching the river network due to the exposure of the bare soil to the impact of rain drops and to the bed shear stress generated by the surface runoff. Hence, a correct understanding of the soil erosion and sediment transport processes inside badlands can help to a better characterisation of the suspended sediment production at the catchment scale. In this work we study the suitability of a two-dimensional (2D) physically-based event-scale erosion model as a tool to represent soil erosion and sediment transport in badlands at a seasonal scale. The model solves the 2D shallow water equations, including infiltration and rainfall, in order to compute the generation and routing of surface runoff within the badland. Coupled to the hydrodynamic equations, the model solves a 2D suspended sediment transport equation with source terms that account for rainfall- and runoff-driven erosion and sediment deposition. Based on this model, an overall procedure was developed and tested considering, as case study, a badland located in El Soto catchment (central Pyrenees, Iberian Peninsula). For the analysed badland, several high-resolution topography surveys were available, which allowed for the estimation of the soil loss and the spatial distribution of erosion patterns for periods of 3–4 months over two years. These data sets were used to calibrate and validate the proposed modelling approach, and to analyse its capabilities and limitations for the assessment of soil erosion at the seasonal scale.},

keywords = {2D shallow water equations, High-resolution topographic data, Rainfall/runoff modelling, Seasonal scale, Soil erosion},

pubstate = {published},

tppubtype = {article}

}