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PORTAIL D'INFORMATION GÉOGRAPHIQUE

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  • Imaging periglacial conditions with ground-penetrating radar
  • Canada ; Geophysics ; Ground ice ; Northwest Territories ; Periglacial features ; Permafrost ; Radar ; Research technique ; Soil temperature ; Soil water ; Stratigraphy
  • Three important parameters that need to be quantified for many permafrost studies are the location of ice in the ground, the position of thermal interfaces, and spatial variations of the water content in the active layer. The data from over 100
  • investigations in permafrost regions demonstrate that ground-penetrating radar (GPR) offers an effective way to measure these parameters at a scale appropriate for many process and geotechnical studies. The AA. discuss the fundamental properties of GPR and how
  • Chemical erosion ; Cold area ; Geophysics ; Ground freezing ; Lapland ; Periglacial features ; Regolith ; Seasonal variation ; Spatial variation ; Sweden ; Weathering
  • describe regolith thickness and ground frost conditions at the time of measurement.
  • The use of tomographic geoelectrical measurements for the detection of ground ice occurrences in mountainous regions is evaluated. Because isolated ground ice occurences in a warming climate may be subject to rapid thawing, they present a future
  • Canada ; Climatic variation ; Cold area ; Geophysics ; Ground survey ; Ice ; Palsa ; Periglacial features ; Permafrost ; Quebec ; Radar
  • meter and time-domain-reflectometry (TDR) probes to measure the unfrozen water content of the soil. Three phases of ground thermal and hydrological conditions were identified, each with distinct consequences for soil movements.