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Résultats de la recherche (17 résultats)

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Par Collection Par Auteur Par Date Par Sujet Par Titre
  • Reconstructing ancient topography through erosion modelling
  • Bassin-versant ; Belgique ; Erosion des sols ; Holocène ; Loess ; Modèle ; Modèle numérique de terrain ; Paléogéographie ; Paléogéomorphologie ; Topographie
  • Belgium ; Digital elevation model ; Holocene ; Loess ; Model ; Palaeogeography ; Palaeogeomorphology ; Soil erosion ; Topography ; Watershed
  • The AA. present a topography based hillslope erosion and deposition model that is based on the WATEM/SEDEM model structure and works on a millennial time scale. Soil erosion, transport and deposition are calculated using slope and unit contributing
  • area. The topography is iteratively rejuvenated by taking into account modelled erosion and deposition rates, thereby simulating topographic development backwards in time. The model is spatially evaluated, using detailed estimates for historical soil
  • erosion and show that the model can simulate realistic soil redistribution patterns.
  • Soil erosion. Experiments and models
  • 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
  • The influence of both process descriptions and runoff patterns on predictions from a spatially distributed soil erosion model
  • Bassin-versant ; Belgique ; Erosion des sols ; Erosion hydrique ; Loess ; Modèle ; Ravinement ; Ruissellement ; Simulation
  • Belgium ; Gully erosion ; Loess ; Model ; Rill wash ; Simulation ; Soil erosion ; Water erosion ; Watershed
  • This study presents a sensitivity analysis of the soil erosion model LISEM, whereby not only the sensitivity to parameter values is considered, but attention is focused on the effects of process descriptions and the routing of overland flow
  • . As erosion models include a wide range of processes (i.e. rainfall, interception, surface storage, overland flow, soil erosion and deposition), this implies that only a relatively small fraction of all possible variations is explored here.
  • Spatially distributed data for erosion model calibration and validation : the Ganspoel and Kinderveld datasets
  • Bassin-versant ; Belgique ; Distribution spatiale ; Ecoulement ; Erosion des sols ; Loess ; Modèle ; Précipitation ; Ravinement ; Utilisation agricole du sol
  • Agricultural land use ; Belgium ; Gully erosion ; Loess ; Model ; Precipitation ; Runoff ; Soil erosion ; Spatial distribution ; Watershed
  • The AA. describe a dataset that offers possibilities for improved evaluation and parameterisation of spatially distributed soil erosion models. The dataset combines rainfall, runoff and sediment discharge data collected at the outlet and field
  • surveys within the catchments that describe soil surface charcteristics and soil erosion features. The paper dicusses and illustrates the use of the dataset to narrow uncertainties associated with model predictions.
  • Action anthropique ; Bassin-versant ; Bilan sédimentaire ; Erosion ; Modèle ; Modèle conceptuel ; Transport sédimentaire ; Utilisation du sol ; Vitesse d'érosion
  • Conceptual model ; Erosion ; Erosion rate ; Human impact ; Land use ; Model ; Sediment budget ; Sediment transport ; Watershed
  • Specific sediment yield in Tigray-Northern Ethiopia : assessment and semi-quantitative modelling
  • Bassin-versant ; Bilan sédimentaire ; Erosion des sols ; Ethiopie ; Gestion de l'eau ; Lac artificiel ; Modèle ; Sédimentation
  • Ethiopia ; Model ; Reservoir ; Sediment budget ; Sedimentation ; Soil erosion ; Water management ; Watershed
  • Sediment deposition in reservoirs is a serious off-site consequence of soil erosion in Tigray. Field rating of catchment characteristics and the sediment yield data from the reservoir survey were used for calibration and validation of the models
  • Testing the ephemeral gully erosion model (EGEM) for two Mediterranean environments
  • Alentejo ; Bassin-versant ; Domaine méditerranéen ; Erosion des sols ; Espagne ; Friche ; Modèle ; Murcia ; Portugal ; Ravinement ; Sol cultivé ; Utilisation du sol ; Vitesse d'érosion
  • Alentejo ; Cultivated land ; Erosion rate ; Gully erosion ; Land use ; Mediterranean area ; Model ; Murcia ; Portugal ; Soil erosion ; Spain ; Wasteland ; Watershed
  • Bassin-versant ; Bilan sédimentaire ; Domaine méditerranéen ; Erosion des sols ; Glissement de terrain ; Italie ; Modèle ; Prévision
  • Forecast ; Italy ; Landslide ; Mediterranean area ; Model ; Sediment budget ; Soil erosion ; Watershed
  • sediment delivery rates with increasing catchment area. Furthermore, this positive relation suggests that processes other than upland erosion are responsible for catchment sediment yield. Here, the AA. explore the potential of the Factoring Scoring Model
  • (FSM) and the Pacific Southwest Interagency Committee (PSIAC) model to predict sediment yield and indicate the most important sediment sources.
  • Action anthropique ; Années 1952-1996 ; Ardenne ; Belgique ; Couvert végétal ; Distribution spatiale ; Dynamique de versant ; Glissement de terrain ; Modèle numérique de terrain ; Mouvement de masse ; Photogrammétrie ; Précipitation ; Versant
  • Ardenne ; Belgium ; Digital elevation model ; Human impact ; Landslide ; Mass movement ; Photogrammetry ; Plant canopy ; Precipitation ; Slope ; Slope dynamics ; Spatial distribution
  • The aim of this study is to better understand the current activity of the landslides in the Flemish Ardennes. Based on accurate multi-temporal digital terrain models (DTMs), the AA. map first the areas of ground movement, then they analyse
  • will have the same causal factors as the landslides initiated in the past. Significant model results were obtained, with pre-landslide hillslope gradient and 3 different clayey lithologies being important predictor variables. Receiver Operating
  • Characteristics (ROC) curves and the Kappa index were used to validate the model. The results allow to conclude that the model is capable of predicting hillslope sections prone to landsliding.
  • Analyse spatiale ; Andes ; Domaine semi-aride ; Equateur ; Erosion des sols ; Erosion hydrique ; Modèle ; Montagne ; Photographie aérienne ; Ravinement ; Utilisation du sol
  • Aerial photography ; Andes ; Ecuador ; Gully erosion ; Land use ; Model ; Mountain ; Semi-arid area ; Soil erosion ; Spatial analysis ; Water erosion
  • of land use changes on the intensity and spatial pattern of water erosion using a spatial modelling approach.
  • Bassin-versant ; Erosion des sols ; Espagne ; Lac artificiel ; Modèle ; Prévision ; Ravinement ; Taux de sédimentation
  • Forecast ; Gully erosion ; Model ; Reservoir ; Sedimentation rate ; Soil erosion ; Spain ; Watershed
  • a factorial scoring index model that provides a fairly accurate and reliable prediction of SSY.
  • Agropédologie ; Bassin-versant ; Changement global ; Erosion des sols ; Modèle ; Propriétés du sol ; Ravinement ; Topographie ; Utilisation du sol
  • Agropedology ; Global change ; Gully erosion ; Land use ; Model ; Soil erosion ; Soil properties ; Topography ; Watershed
  • Bassin-versant ; Erodabilité ; Erosion des sols ; Impact ; Modèle mathématique ; Prévision ; Ravinement ; Topographie
  • Erodibility ; Forecast ; Gully erosion ; Impact ; Mathematical model ; Soil erosion ; Topography ; Watershed
  • Bassin-versant ; Belgique ; Domaine méditerranéen ; Erodabilité ; Erosion des sols ; Erosion hydrique ; Espagne ; Etude comparée ; Loess ; Modèle ; Photographie aérienne ; Portugal ; Ravinement ; Sol cultivé
  • Aerial photography ; Belgium ; Comparative study ; Cultivated land ; Erodibility ; Gully erosion ; Loess ; Mediterranean area ; Model ; Portugal ; Soil erosion ; Spain ; Water erosion ; Watershed
  • obtained can be used to improve erosion models on stony hillslopes.
  • Gully erosion in mountain areas : processes, measurement, modelling and regionalization