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Portail d'information géographique

Résultats de la recherche (56 résultats)

A paleohydrologic reinterpretation of the Homeb Silts, Kuiseb River, central Namib Desert (Namibia) and paleoclimatic implications

the Last Glacial Maximum, LGM, but that they are records of big floods with tributary backflooding that were caused by more frequent precipitation events in the Kuiseb catchment during the LGM.
2002

Ecobiostratigraphic, lithostratigraphic, depositional and synthemic setting of Cenozoic units in Southern Sardinia (Italy)

of Miocene age. The major sedimentary, tectonic and volcanic events that occured in the island between the Oligocene and the Pliocene are briefly outlined, also viewed in the broader context of the geodynamic evolution of the western Mediterranean. - (NF)
2002

The Battle of the Somme in Ulster memory and identity

The paper considers one aspect of the contestation of belonging that increasingly characterizes unionism. It examines the competition for the ownership of the mythology of the Battle of the Somme, long a key event in the unionist narrative
2002

Les risques naturels en Belgique et leurs conséquences sur l'homme (1ère partie)

Belgium ; Climatic event ; Documentation ; Impact ; Natural hazards ; Rainstorm ; Teaching ; Tornado
2002

Is the ENSO phenomenon changing as a result of global warming ?

This study aims to investigate whether there is any evidence for changes in the behavior of the ENSO phenomenon over the past 122 years that may be attributed to global warming. Cluster analysis is carried out to group warm and cold events
2002

Uranium contamination of fluvial systems - mechanisms and processes. Part III : diurnal and event-related fluctuation of stream chemistry - Pitfalls from mining affected streams in South Africa, Germany and Australia

Uranium contamination of fluvial systems - mechanisms and processes. Part III : diurnal and event-related fluctuation of stream chemistry - Pitfalls from mining affected streams in South Africa, Germany and Australia
2002

Précipitations exceptionnelles et crues-éclair dans l'aire pyrénéo-méditerranéenne

Catastrophe ; Exceptional event ; Flood ; Forecast ; France ; Geomorphogenesis ; Impact ; Landes ; Modelling ; Natural hazards ; Precipitation ; Pyrénées-Orientales
2002

Stable isotopes in pocket gopher teeth as evidence of a Late Matuyama climate shift in the southern Rocky Mountains

analyzed data from these localities, the evidence indicates a shift in the severity of glacial events that is mainly related to the hydrologic characteristics of the climate. This shift may have been caused by broad regional uplift that may have been
2002

Phreatic overgrowths on speleothems : a useful tool in structural geology in littoral karstic landscapes. The example of eastern Mallorca (Balearic Islands)

region different altimetric positions of coeval phreatic speleothems suggest the existence of a recent tectonic activity. The characteristics and chronology of this tectonic event are the objectives of this paper, pointing out at the same time
2002

Années à quantités d'eau extrêmes : manifestations et conséquences

Ecosystem ; European part of Russia ; Exceptional event ; Fluvial hydrology ; Forest ; Steppe ; Water ; Water balance ; Water resources
2002

Recent research on the nature, origin and climatic relations of blocky and stratified slope deposits

to (cold-climate) extreme events : frost-coated clast flows, aeolian transport of large platy clasts, and to a lesser extent debris-flows.
2002

Frequency and spatial distribution of landslides in a mountainous drainage basin : Western Foothills, Taiwan

activity, major road construction, and extreme typhoon and earthquake events produce short-term acceleration of landslide incidence.
2002

L'épisode de pluies diluviennes du 12 au 13 novembre 1999 sur le Sud de la France

Atmospheric disturbance ; Atmospheric dynamics ; Catastrophe ; Exceptional event ; Forecast ; France ; Heavy rain ; Languedoc-Roussillon ; Midi-Pyrénées ; Precipitation
2002

Entre ciel et terre. Climat et sociétés

Adaptation ; Climate ; Climatic event ; Climatic variation ; Cultural studies ; Ethnology ; Globalization ; Perception ; Society
2002

Evolution of soil surface roughness and flowpath connectivity in overland flow experiments

after a sequence of rainfall events were quantified utilising a laser scanner. A conditioned-walker model was used to study the process of depression filling and the triggering of runoff. This study is expected to enhance understanding of soil roughness
2002

Fluvial systems response to rift margin tectonics : Makhtesh Ramon area, southern Israel

the relation between tectonic events and the evolution of fluvial elements in the central Negev.
2002

Medium-term evolution of a gully developed in a loess-derived soil

The medium-term evolution of a gully (Kinderveld gully) initiated in a cultivated area on loess-derived soils southwest of Leuven (Belgium) in May-June 1986, was studied over 15 years. Two intense rainfall events created this (ephemeral) gully
2002

Geomorphic effectiveness, sandur development, and the pattern of landscape response during jökulhlaups : Skei∂arársandur, southeastern Iceland

to the late Holocene depositional history of the sandur and the hydrologic conditions occuring during the event itself.
2002

Stream response to repeated coseismic folding, Tiptonville dome, New Madrid seismic zone

folding produced by these earthquakes; and to partition the amount of deformation produced by individual events.
2002

Sea cliffs resulting from late Miocene extensional tectonics : the Serra Gelada case study (Betic Cordillera, Spain)

This paper is a multidisciplinary study, which aims to establish a long-term landscape development of a coastal area. The AA. define the type and timing of the events responsible for the genesis of the Serra Gelada sea cliffs. In addition
2002