Erosion des sols ; Expérimentation ; Modèle ; Précipitation ; Sol
Experimentation ; Model ; Precipitation ; Soil ; Soil erosion
In this paper, an approach to modelling the sheet and interrill erosion processes dominated by rain-impacted flow is developed from the results of laboratory studies.
Etude des mécanismes élémentaires de la désagrégation en analysant le comportement d'agrégats de sols limoneux lors d'une immersion ou d'une réhumectation par capillarité. Proposition d'un modèle d'évolution structurale superficielle, qui s'appuie
sur les interactions entre l'état initial, les caractéristiques des pluies et les propriétés des sols. L'objectif de ce modèle est de prévoir la dynamique de la formation des croûtes. Il pourrait constituer un sous-modèle d'un modèle général du
The paper describes a water and sediment budget model, averaging across the width of the slope, to explore the balance between processes, and in particular to explore the possibilities for cyclic behaviour, with alternating zones of deep rilling
Ecoulement superficiel ; Erosion des sols ; Expérimentation ; Modèle ; Probabilité ; Transport solide ; Turbulence
Experimentation ; Model ; Overland flow ; Probability ; Sediment transport ; Soil erosion ; Turbulence
Threshold conditions for entrainment of gravel by concentrated overland flow are here discussed. The measured data indicate that cohesive forces may arise and must be taken into account by the models describing grain entrainment. Some models
This paper outlines some recent developments in modelling soil erosion processes, and their use as a template on experimental data in order to derive soil erodibility parameters of defined physical meaning. The paper first compares a theoretical
model used to describe the result of armouring in stream beds with a model designed to describe, at equilibrium, the relationship between the size distribution of sediment in transport with the size distribution of the bed over which it flows
In this work, numerical simulation is used as an exploratory tool to investigate the potential influence of dynamic soil catena with the long term evolution of hillslopes. The models consider only very simplified hillslope profiles with a prescribed
Erosion des sols ; Europe ; Hydraulique ; Loess ; Modèle mathématique ; Précipitation ; Ravinement ; Transport sédimentaire ; Versant
Europe ; Gully erosion ; Loess ; Mathematical model ; Precipitation ; Sediment transport ; Slopes ; Soil erosion
Climatic and hydraulic threshold conditions for thalweg incision are discussed on the basis of a physical-mathematical model, which includes such parameters as the critical shear stress of flows for non-selective erosion in loess, flow width