inscription
Portail d'information géographique

Résultats de la recherche (246 résultats)

Affinez votre recherche

Par Collection Par Auteur Par Date Par Sujet Par Titre
  • Stream power terminology
  • Concept ; Dynamique fluviale ; Fluviatile ; Géographie physique ; Stream power ; Terminologie
  • Determining the causes of pleistocene stream-aggradation in the central coastal areas of Western Australia
  • The general geomorphological characteristics of the drainage basins and the details of the sedimentology/paleohydraulics suggest that stream aggradation was due to sediment yields exceeding stream capacity. However, from a consideration
  • of the mechanics of stream aggradation it is demonstrated that stream aggradation was a response to both sediment supply and base level controls.
  • Lateral migration of stream channels in Geomorphological models. Theoretical and empirical aspects.
  • A framework for the simulation of lateral stream and divide migration of non alluvial valleys is presented. Stream channels and hillslopes are modelled as mutual boundary conditions, with the horizontal channel shifting determined by the asymmetry
  • of sediment delivery from opposite valley walls, and the ability of the stream to rapidly remove that debris. Conditions for the growth or decay of existing small tributaries are investigated along with implications for the development of stream junction
  • The dynamics of polar jet streams as depicted by the METEOSAT WV channel radiance field
  • (Juillet 1978) ; Circulation atmosphérique ; Circulation latitudinale ; Europe ; Europe du Nord ; Géographie physique ; Imagerie satellitaire ; Jet polaire ; Jet stream ; Jet subtropical ; Météosat ; Satellite géostationnaire ; Satellite
  • A polar jet stream flowing over northern Europe (14 july 1978) is investigated using both the radiosounding network and the Meteosat water vapor (WV) channel imagery. A maximum radiance band associated with the polar jet stream is shown
  • to accurately delineate the tropopause break. A major difference in the subtropical jet stream radiative signature is noted, however. (JPB).
  • Effects of meandering in alluvial streams
  • Morphology of cobble streams is small watersheds
  • Influence of stream orientation structures on drainage networks
  • Mechanics of sediment transportation and alluvial stream problems
  • Longitudinal changes in size and sorting of stream beds material in four English Rivers
  • Stream network volume: an index of channel morphometry
  • Stream-channel response to floods, with examples from central Texas
  • Movement of cobbles in a gravel-bed stream during a flood season
  • Coarse woody debris and channel morphology interactions for indisturbed streams in southeast Alaska, U.S.A.
  • The AA. examined five low-gradient streams in southeast Alaska in watersheds that were undisturbed by land-use activities. They assessed the interaction between coarse woody debris and channel characteristics to evaluate the role of wood in forming
  • channel shape for a range of stream sizes.
  • Supraglacial stream dynamics on the Juneau icefield
  • Measurements of discharge, reach morphology, and cross-section morphology in supraglacial streams on the Juneau Icefield reveal controlling variables that have analogous counter parts in alluvial streams.
  • On the crossover between the Gulf Stream and the Western Boundary Undercurrent
  • Atlantique ; Atlantique, Nord ; Circulation océanique ; Etats-Unis ; Gulf Stream ; Géographie physique ; Hydrologie marine ; Sous-courant ; Zone tempérée
  • Six courantomètres mouillés à 100m au-dessus du fond entre 1200 et 4200m, de mai à juillet 1971. Le Gulf Stream ne toucha le fond que pendant de brèves périodes. Débit du WBUC: 2410m/s. (JRV).
  • A classification of sand wave in alluvial stream.
  • The concept of sand waves in stream beds is discussed and the principles for their classification examined. The classification divides waves into two grades| the first covers two subdivisions and the second covers six. Each is defined and described
  • Perturbations to the Gulf Stream by AtlantisII Seamount
  • Atlantique ; Atlantique, Nord ; Circulation océanique ; Courant ; Etats-Unis ; Gulf-Stream ; Géographie physique ; Hydrologie marine ; Mont sous-marin
  • Vertical temperature gradient structure across the Gulf Stream
  • Atlantique ; Atlantique, nord-ouest ; Canada ; Etats-Unis ; Gulf Stream ; Géographie physique ; Hydrologie marine ; Température
  • Scales of motion in the deep Gulf Stream and across the Contiental Rise
  • Atlantique ; Atlantique, Nord ; Circulation océanique ; Courants profonds ; Etats-Unis ; Glacis continental ; Gulf Stream ; Géographie physique ; Hydrologie marine
  • Vertikal'nye cirkuljacii v strujnyh tecenijah i frontogenez. (Circulation verticale dans les jet stream et frontogénèse)
  • Circulation atmosphérique ; Dynamique de l'atmosphère ; Front ; Géographie physique ; Jet stream ; Troposphère