inscription
PORTAIL D'INFORMATION GÉOGRAPHIQUE

Résultats de la recherche (96 résultats)

Affinez votre recherche

Par Collection Par Auteur Par Date Par Sujet Par Titre
  • Relative dating of Quaternary moraines, Rongbuk Valley, Mount Everest, Tibet : implications for an ice sheet on the Tibetan Plateau in XIII INQUA Congress issue.
  • Relative-dating studies applied to high-altitude moraines (5 000-5 500 m) in the Rongbuk valley on the northern flank of Mt. Everest reveal strong contrasts in the weathering characteristics of the boulders exposed along moraine crests
  • 1991
  • Byelorussia ; Dating ; Floodplain ; Fluvial processes ; Geomorphogenesis ; Holocene ; Pleistocene ; Quaternary ; Stream ; Terrace ; Valley
  • . These changes were conditioned by a climate and established also in other valleys of East-European Lowland and in valleys of Poland. - (DG)
  • 1991
  • Action anthropique ; Agrosystème ; Bassin-versant ; Colonisation agricole ; Déforestation ; Défrichement ; Dégradation de l'environnement ; Erosion des sols ; Forêt ; Kenya ; Pression démographique ; Rift Valley
  • Agricultural colonization ; Agrosystem;Farming systems ; Catchment area;Watershed ; Deforestation ; Environmental degradation ; Forest ; Human impact ; Kenya ; Land clearing ; Population pressure ; Rift Valley ; Soil erosion
  • Evaluation des changements sur les aires forestières du bassin-versant du Lac Elementeita (335 km2) dans la Rift Valley au Kenya. D'après une étude diachronique des images infra-rouge LANDSAT entre 1973 et 1984, on a constaté une déforestation
  • 1991
  • Evolution of the Vistula river valley during the last 15 000 years, part IV
  • Alluvium ; Drainage network ; Fluvial deposit ; Fluvial processes ; Holocene ; Meander ; Paleogeomorphology ; Poland ; Quaternary ; River bed ; Sedimentology ; Valley ; Valley floor evolution ; Wisła
  • 1991
  • This paper analyses the changes of precipitation with altitude and the relation between precipitation and glacier distribution. The study shows that precipitation increases rapidly with altitude from the valley floor at about 4 000 m, which results
  • in higher precipitation in the firn area. Annual accumulation at equilibrium line comes up to 800 to 900 mm in the head of the Yarkant valley and 1 500 to 2 000 mm around Qogir area.
  • 1991
  • Mass wasting on valley-side ice-cored moraines, Boundary Glacier, Alberta, Canada
  • 1991
  • Farming system ; Farming;Agriculture ; Land use ; Mass movement ; Mountain ; Papua New Guinea ; Population density ; Slope ; Slope gradient ; Soil erosion ; Valley
  • Agricultural use of steep slopes in the densely populated Chimbu valley has incurred mass movement (slumps, slides and flows), but not rill or gully erosion. These processes provide clues to the complex history of highland slope farming.―(DWG)
  • 1991
  • Stratigraphy and paleomagnetism of the Jaw Face section, Wellsch Valley site, Saskatchewan
  • 1991
  • Dam ; Earth surface processes ; Fluvial dynamics ; Fluvial processes ; Holocene ; Hydraulic works ; Lower valley ; Palaeovalley ; Poland ; Quaternary ; River bed ; Valley floor evolution ; Wisła
  • 1991
  • A chronology of landslide activity in the valley of Rivière du Gouffre, Charlevoix, Québec
  • 1991
  • Canyon ; Dating ; Debris flow ; Eolian erosion;Wind erosion ; Freezing ; Ice wedge ; Mass movement ; Nivation hollow ; Periglacial features ; Slope dynamics ; Solifluction ; Sweden ; Valley
  • The distribution of periglacial features in canyon valleys of Söderåsen horst, south Sweden, is surveyed. Frost weathered rockwalls and talus slopes are the dominating periglacial forms. Datings of sediments suggest a Younger Dryas age for some
  • 1991
  • Conglomerate ; Inland ice ; Lithology ; Lower valley ; Poland ; Quaternary ; Rock ; Sandstone ; Sedimentary ; Sedimentary rock ; Wisła
  • Quaternary sandstones and conglomerates found on the valley-sides of the lower Vistula River have been identified as a product of precipitation of CaCO3 under stagnant Middle-Vistulian ice sheet. The trigger mechanizm of precipitation of CaCO3 has
  • 1991
  • mapping project (1:5 000) all the landslides in the Katzenlochbach Valley and Melb Valley southwest of Bonn have been recorded by type and age. It is intended to varify this classification by the study of soil catenas. The program will contribute
  • 1991
  • Cracow ; Dating ; Floodplain ; Fluvial deposit ; Fluvial processes ; Meander ; Palaeovalley ; Poland ; River bed ; Sedimentology ; Valley floor evolution ; Wisła
  • Flat-floored depressions without traces of paleomeanders occur frequently on the Vistula flood plain within the Sandomierz Basin. One of this, the Drwień depression extends along the southern Vistula valley side between Cracow and Niepołomice
  • 1991
  • Drainage network ; Fluvial capture ; Fluvial dynamics ; Fluvial erosion ; Fluvial processes ; Geomorphogenesis ; River bed ; Stream ; Valley ; Valley floor evolution
  • 1991
  • A high valley width stretch of the Ravi river―evidence for strike slip related neotectonic activity in the western Himalaya
  • 1991
  • A case study of soil erosion on frozen ground in the river Lärjean valley, NE Goteborg, SW Sweden
  • 1991
  • On the development of the Late Quaternary river valleys in the Saale-Elbe lowland with emphasis on radio carbon data
  • Radiocarbon dating has been applied for the first time to samples systematically collected in the Saale-Elbe area, a well geologized region in Central Europe, in order to enable precise statements to be made on how the valleys were formed during
  • 1991
  • Evolution of the Vistula river valley during the last 15 000 years, part IV
  • Alluvium ; Dendrochronology ; Dendrology ; Fluvial deposit ; Fluvial processes ; Oak ; Paleogeomorphology ; Poland ; Sedimentology ; Stratigraphy ; Valley ; Wisła
  • 1991
  • Climatic variation ; Cracow ; Fluvial processes ; Holocene ; Human impact ; Meander ; Paleogeomorphology ; Poland ; River bed ; Stream ; Valley ; Vegetation ; Wisła
  • New sites in the Vistula valley between Cracow and Niepołomice were discussed and 7 generations of Holocene meanders was distinguished, which cut off in 8 000, 6 700-6 200, 5 400-5 200, 4 400-4 000, 3 000, 2 200-2 100 BP and Little Ice Age. A clear
  • 1991