The AA. believe that in modelling hillslope processes, a combination of both theoretical and experimental approaches is needed as illustrated by several examples from the Louven laboratory.
The soil erodibility factor K used in the Revised Universal Soil Loss Equation can be calculated by two general applicable models. Data on the various soils covering northern Belgium are processed to evaluate the use of these models. Erodibility
factors are calculated for the top layer of soils where rill and interrill erosion occur. The K-values generated by each model are then compared throughout the range of soil types varying erodibility. For both models average K-values per unit area
The AA. present a spatially distributed model for the calculation of sediment delivery to river channels (SEDEM : SEdiment DElivery Model) at a catchment scale (100 to 10 000 km2). The model was applied on several catchments in central Belgium
The effect of slope angle on splash detachment has been a matter of discussion for long because it has not always been clearly observed in experiments. In this paper a model, based on the physics of the drop impact, is developed.
Approvisionnement en eau ; Bibliographie ; Efficacité ; Equation ; Etang ; Irrigation ; Lutte contre les inondations ; Modèle ; Piégeage ; Réservoir ; Sédimentologie
Bibliography ; Flood control ; Irrigation ; Model ; Pond ; Sedimentology ; Water supply
Cet article présente une revue des différentes méthodes disponibles pour estimer l'efficacité de piégeage des réservoirs et des étangs : modèles empiriques et modèles théoriques; implications pour l'établissement de bilans sédimentaires; lacunes de
Bassin-versant ; Belgique ; Bilan sédimentaire ; Erosion des sols ; Modèle ; Régression multiple ; Sol cultivé ; Zone tempérée
Belgium ; Cultivated land ; Model ; Multiple regression ; Sediment budget ; Soil erosion ; Temperate zone ; Watershed
variation in observed sediment yield. A multiple regression model including 3 morphological catchment properties is a valuable tool to predict total sediment yield from catchments in central Belgium. This model has an efficiency of 0.81. The importance
of spatially distributed parameters within catchments are some of the major reasons that the proposed model does not explain all observed variation in sediment yield.
Belgique ; Erosion des sols ; Expérimentation ; Granulométrie ; Modèle ; Pente de versant ; Ruissellement ; Transport sédimentaire
Belgium ; Experimentation ; Grain size distribution ; Model ; Rill wash ; Sediment transport ; Slope gradient ; Soil erosion
specifically, the study investigates to what extent sediment deposition (both total mass and sediment quality) can be predicted using the simple theory for flows with a shear stress below the threshold value, and which modelling approach can best be used once
Dynamique de versant ; Erosion des sols ; Erosion pluviale ; Expérimentation ; Géographie physique ; Géomorphodynamique ; Modèle ; Technique de recherche ; Versant
Expériences en laboratoire sur la détachabilité et le transport de neuf sédiments meubles sur un bac d'essai de 100 20 cm avec un écran récepteur d'un mètre carré. Le modèle trigonométrique proposé est une expression du rapport du sédiment recueilli