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Résultats de la recherche (22 résultats)

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  • Spatial distribution of rock fragments in cultivated soils in northern Ethiopia as affected by lateral and vertical displacement processes
  • Distribution spatiale ; Domaine aride ; Domaine semi-aride ; Désertification ; Ethiopie ; Fragment de roche ; Pente de versant ; Pratique culturale ; Ruissellement ; Sol ; Sol cultivé
  • Agricultural practice ; Arid area ; Cultivated land ; Desertification ; Ethiopia ; Rill wash ; Semi-arid area ; Slope gradient ; Soil ; Spatial distribution
  • Although, in semi-arid environments, rock fragments at the soil surface and within the topsoil play an important role in desertification control, little is known about their spatial distribution. Therefore, this study analyses spatial patterns
  • The impact of environmental change on the intensity and spatial pattern of water erosion in a semi-arid mountainous Andean environment
  • 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.
  • Spatial and temporal patterns of soil erosion rates in an agricultural catchment, central Belgium
  • Bassin-versant ; Belgique ; Drainage ; Erosion des sols ; Limon ; Ravinement ; Sol cultivé ; Variation spatiale ; Vitesse d'érosion
  • Belgium ; Cultivated land ; Drainage ; Erosion rate ; Gully erosion ; Loam ; Soil erosion ; Spatial variation ; Watershed
  • This paper presents some results of a survey conducted to study the temporal and spatial variability of the erosional system in two adjacent cultivated catchments in the Belgian Loam belt. Assessment of soil erosion rates, some controlling factors
  • 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
  • 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
  • their spatial and temporal distribution as well as the magnitude of the vertical and horizontal ground displacements. After field validation of the detected movements, they finally discuss their controlling factors. While most movements were triggered by intense
  • rainfall, their spatial and temporal distribution is strongly related with the nature of the vegetation cover and the human activity.
  • Characteristics and spatial distribution of large landslides in the Flemish Ardennes (Belgium)
  • Ardenne ; Belgique ; Distribution spatiale ; Forêt ; Glissement de terrain ; Géomorphologie appliquée ; Lithologie ; Pente de versant ; Probabilité ; Risque ; Séisme
  • Applied geomorphology ; Ardenne ; Belgium ; Earthquake ; Forest ; Landslide ; Lithology ; Probability ; Risk ; Slope gradient ; Spatial distribution
  • Etude des caractéristiques et de la répartition spatiale des grands glissements de terrain dans les Ardennes flamandes. La majorité d'entre eux sont situés sous forêts et sont plutôt stables, cependant des réactivations peuvent se produire. Leur
  • répartition spatiale est conditionnée par la nature de la roche, l'intensité et l'orientation de la pente. Ces 2 derniers facteurs sont fortement liés à l'asymétrie prononcée des vallées de la zone d'étude et à la géométrie du réseau hydrographique. Des
  • Spatial distribution of gully head activity and sediment supply along an ephemeral channel in a Mediterranean environment
  • The AA. examine the factors that control the spatial distribution of bank gully heads along a reach of an ephemeral river (Rambla Salada) in an area threatened by desertification in Southeast Spain. The activity of 458 gully heads was assessed
  • By studying the causal factors for landslides in a small mountainous area of Manjiya County, this paper tries to contribute to the restricted knowledge on landslides in East Africa. After a brief introduction of the study area and the spatial
  • distribution and characteristics of its landslides, the preconditions, preparatory and triggering causal factors for mass movement will be discussed with attention to their spatial variation.
  • Gully erosion in South Eastern Tanzania : spatial distribution and topographic thresholds
  • Densité de population ; Distribution spatiale ; Erodabilité ; Erosion des sols ; Occupation du sol ; Plaine ; Plateau ; Propriétés du sol ; Ravinement ; Rugosité ; Seuil ; Tanzanie ; Topographie ; Unité paysagique
  • Erodibility ; Gully erosion ; Land utilisation ; Landscape unit ; Plain ; Plateau ; Population density ; Roughness ; Soil erosion ; Soil properties ; Spatial distribution ; Tanzania ; Threshold ; Topography
  • Agropédologie ; Bassin-versant ; Belgique ; Erosion des sols ; Limon ; Portugal ; Propriétés du sol ; Ravin temporaire ; Ravinement ; Ruissellement ; Variation spatiale
  • Agropedology ; Belgium ; Gully erosion ; Loam ; Portugal ; Rill wash ; Soil erosion ; Soil properties ; Spatial variation ; Watershed
  • Afrique ; Analyse spatiale ; Brousse tigrée ; Couverture végétale ; Domaine aride ; Domaine semi-aride ; Eau du sol ; Ecosystème ; Encroûtement ; Erosion des sols ; Monde ; Niger ; Paysage ; Propriétés du sol ; Végétation ; Zonage
  • Africa ; Arid area ; Duricrust ; Ecosystem ; Landscape ; Niger ; Plant cover ; Semi-arid area ; Soil erosion ; Soil properties ; Soil water ; Spatial analysis ; Vegetation ; World ; Zoning
  • The influence of both process descriptions and runoff patterns on predictions from a spatially distributed soil erosion model
  • Ephemeral gullies. A spatial and temporal analysis of their characteristics, importance and prediction
  • The study area is part of the Belgian loess belt and is located south of Leuven. The objectives of this study are : to determine the spatial distribution of closed depressions (CDs) within an ancient forest area and under cropland; to determine
  • . The large regional, local and even temporal variability in the trend between A and SSY implies that prediction of SSY based on A alone is troublesome and preferably spatially distributed information on land use, climate, lithology, topography and dominant
  • This paper investigates the spatial and temporal variation of soil erosion rates at the microscale under three representative species of the Mediterranean matorral, which represent a range of morphologies and phenologies. The main objective
  • qu'une telle méthodologie nécéssitait une comptabilité des données à la fois spatiales et temporelles. Un étalonnage des différentes sources de données est nécéssaire de façon à éviter des erreurs dans les résultats.
  • This study investigates the origin of closed depressions (CDs) in a study area southwest of Leuven. First, a study of the morphological characteristics of the CDs was made. Next, the relationship between the spatial distribution of the CDs
  • The objectives of this study are to analyse the spatial variability in area-specific sediment yield (SSY) for catchments in Spain and to understand the major factors controlling this variability. An attempt to explain the remaining variability
  • each contributed results from their specific time and spatial scales in integrated research collaboration. Relevant research conclusions have been combined and a research project undertaken. A provisional protocol for use of past hydrological events