inscription
PORTAIL D'INFORMATION GÉOGRAPHIQUE

Résultats de la recherche (10 résultats)

Affinez votre recherche

Par Collection Par Auteur Par Date Par Sujet Par Titre
  • Mudflows as a rate process
  • The relaxation theory of mudflows arises naturally out of the rate process theory of soil creep without the need for any further major assumptions. The theory adequately explains the main outlines of the behaviour of mudflows. This includes
  • Mudflows resulting from the May 18, 1980, eruption of Mount St. Helens, Washington in Pollution and water resources. Hydrogeology and other selected reports..
  • Mudflows' impact on the mountain rivers channel processes is discussed, the processes' features proved to be different within the zones of mudflows formation, transit and deposition| the channel morphology depends on the form of the mudflow deposits
  • . Aftermudflow flood creates a primary channel in the mudflow deposits, later the channel undergoes a slow transformation by the stream which results in suquential changes of channel types according to changes in the stream slope and discharge. No correlation has
  • been found between alluvium size and channel slope in mudflows while the correlation is quite close in the channel transformed by water course. Mudflows account also for the lack of correlation between dimensions of the pavement on one hand
  • A classification for surficial mass movements is given with illustrations and practical evaluations of the phenomena. Rockfalls, landslides, mudflows, solifluction and talus creep are defined and subdivided. (DLO).
  • stage). The following processes are very active : soil erosion, karstification, mudflow and freeze-thaw processes, eolian deposition. The role of the monsoon climate on the geomorphic processes during the Quarternary was similar to the present one
  • The Soufrière volcano in St Vincent began to erupt on 13 April 1979 after 10 months of mild premonitory activity. A series of strong vertical explosions between 13 and 26 April, generated ash falls, pyroplastic flows and mudflows. From about 3 May
  • The paper discusses the mountain streams channels formation at the Western Tien Shan, differing in mudflow frequency, channel morphology, alluvium composition and biogenous factor contribution to rock particles destruction. Biogenous destruction
  • Rockfalls, landslides, mudflows, cave-ins are events which have affected numerous French regions during the past. Thanks to a systematic inventory carried out by the BRGM, it has been possible to map such processes for the France at 1: 1 000 000
  • The effects of an extreme rainfall triggering debris flows (mudflows) in the mountains S of Abisko, N Sweden, in 1979, are evaluated with regard to geomorphological impact. Several older events of debris flows in the sane area during postglacial
  • Consideration of contemporary environments where the genetic processes related to these features can be observed, implies several conditions for prior events in landscape evolution: (1) tropical stone lines may be interpreted as winnowed mudflows