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PORTAIL D'INFORMATION GÉOGRAPHIQUE

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  • Variations in soil dispersivity across a gully head displaying shallow sub-surface pipes, and the role of shallow pipes in rill initiation
  • A small bifurcating gully head displaying shallow pipe development was surveyed to explore how far three-dimensional patterns of geochemistry and sediment size can be related to hydraulic gradients in the local marl bedrock (Almeria, SE Spain
  • ). It is concluded that calcium replaces sodium in the crust during leaching, leaving a calcic crust, and a sub-crust that is sodic and prone to subsequent pipe enlargement. Rill morphology in these materials also suggests that rills develop from these pipes when
  • pipe roofs collapse.
  • 2004
  • Hydrological connectivity of soil pipes determined by ground-penetrating radar tracer detection
  • Soil pipes are common and important features of many catchments, particularly in semi-arid and humid areas, and can contribute a large proportion of runoff to river systems. Ground Penetrating Radar (GPR) has been used for non-destructive
  • identification and mapping of soil pipes in blanket peat catchments. This paper presents results from an experiment to test the ability of GPR to establish hydrological connectivity between pipes through use of a tracer solution.
  • 2004
  • Algorithme ; Bajkal ; Optimisation ; Pipe-line ; Projet ; Russie d'Asie ; Sibir' ; Système d'information géographique ; Tracé
  • Algorithm ; Asian part of Russia ; Baikal ; Geographical information system ; Optimization ; Pipe-line ; Project ; Siberia
  • 2004
  • Asie ; Asie du Sud-Ouest ; Caspienne ; Eau ; Environnement ; Gaz naturel ; Gestion des ressources ; Pipe-line ; Poisson ; Pollution ; Pétrole ; Radioactivité
  • Asia ; Caspienne Sea ; Environment ; Fish ; Natural gas ; Oil ; Pipe-line ; Pollution ; Radioactivity ; Resource management ; Southwest Asia ; Water
  • 2004
  • Arctique ; Hydrocarbure ; Image radar ; Komi ; Pipe-line ; Pollution ; Traitement des données ; Télédétection ; Zone froide
  • Arctic Region ; Cold area ; Data processing ; Hydrocarbon ; Komi ; Pipe-line ; Pollution ; Radar imagery ; Remote sensing
  • 2004