Résultats de la recherche (9 résultats)

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  • Spatial interaction between collapsed pipes and landslides in hilly regions with loess-derived soils
  • Ardenne ; Belgium ; Collapse structures ; Human impact ; Landslide ; Loess ; Piping ; Slope ; Slope dynamics ; Soil erosion ; Spatial analysis ; Subsurface flow ; Water erosion
  • This study aims at a better understanding of the interaction between collapsed pipe (CP) occurrence and landslide (LS) occurrence in the Flemish Ardennes (Belgium) by comparing their respective spatial patterns. At least 24,5% of the 139 sites
  • with CP were related to the occurrence of an observed LS. Poorly drained LS may create favourable conditions for pipe development. Outside LS, natural and anthropogenic (e.g. broken field drains, road drainage) causes may result in concentrated subsurface
  • flow, resulting in pipe development. No evidence was found that pipe development enhanced LS, probably because the subsurface drainage discharge generated upslope of the LS is too low. Even when pipes become blocked, it is more likely that new pipes
  • develop and new collapses occur than they trigger or reactivate LS. A conceptual model is presented summarizing all elements that influence piping erosion in the Flemish Ardennes, including the role of LS.
  • 2013
  • Badland ; Geomorphogenesis ; Gully erosion ; Mass movement ; Navarra ; Piping ; Rill wash ; Semi-arid area ; Soil erosion ; Soil properties ; Spain ; Water erosion
  • Bardenas Reales badlands are located in the middle-western sector of the Ebro Depression, northern Spain. Several erosion processes operate in the Bardenas Reales : rilling, gullying, piping and mass movements. The relative role played
  • favor piping, gullying and rilling during the rainfall maxima. Soil erodibility in this area is clearly controlled by the sodium content and the presence of swelling clays. These factors determine the distribution and appearance of piping processes
  • . Cracking in Holocene clay deposits, devoid of swelling clays, is related to high sodium content that confers a dispersive character. Clay dispersion causes loss of cohesion favoring piping.
  • 2013
  • Badlands in marl lithologies : A field guide to soil dispersion, subsurface erosion and piping-origin gullies
  • Badland ; Clay mineral ; Europe ; Geochemistry ; Gully erosion ; Marl ; Mediterranean area ; Piping ; Rill wash ; Semi-arid area ; Soil erosion ; Soil properties ; Water erosion ; Western Europe
  • landscape erosion. Surface crust character, ephemeral rills, and large subsurface tunnel settings are explained and classified. In a final section, the geomorphological implications of piping in gullied landscapes are explored by reference to the literature
  • 2013
  • Cluster ; Connaissance ; Diffusion ; Expertise ; Innovation ; Modèle ; Pipe-line
  • Cluster ; Diffusion ; Expertise ; Innovation ; Knowledge ; Model ; Pipe-line
  • Construction d'un modèle qui établit quand des pipe-line mondiaux contribuent à accroître les savoir-faire locaux, dépendant de caractéristiques variées relatives aux clusters telles que la taille, la dotation en connaissances et la facilité de
  • transmission des savoirs internes. Importance du concept de cluster et du rôle de la proximité spatiale dans la diffusion des connaissances. On enregistre une tendance naturelle des acteurs, dans le cadre de ces pipe-line mondiaux, à agir en tant que stars
  • 2013
  • Contesting large-scale water supply projects at both ends of the pipe in Kathmandu and Melamchi Valleys, Nepal
  • 2013
  • Aerial photography ; Cartography ; Environmental degradation ; Gully erosion ; Lesotho ; Photointerpretation ; Piping ; Soil erosion ; Watershed
  • 2013
  • Is the tap locked? an event history analysis of piped water access in Ouagadougou, Burkina Faso
  • 2013
  • The badlands of southwest Taiwan are characterized by sharp ridges, and are located in a tropical monsoon area that experiences contrasting rainy and dry seasons. Surface erosion predominates and subsurface erosion by piping is rather limited
  • 2013
  • Badland ; Erosion control ; Erosion cycle ; Italy ; Land use ; Mediterranean area ; Piping ; Rill wash ; Soil erosion ; Soil properties ; Toscana ; Vegetation ; Vegetation dynamics ; Water erosion
  • 2013