inscription
PORTAIL D'INFORMATION GÉOGRAPHIQUE

Résultats de la recherche (271 résultats)

Affinez votre recherche

Par Collection Par Auteur Par Date Par Sujet Par Titre
  • Morphogenèse du bassin karstique de Rakov Škocjan
  • The Rakov Škocjan Basin is situated in Notranjsko Podolje. In the research, surface and subsurface karst features, which indicate on the formation of the basin were investigated. In the basin slopes rocky terraces were identified, which indicate
  • basin floor flattening on higher elevations and a gradual basin development and transformation with surface water flow. The Rakov Škocjan Basin was formed as a surface karst feature with several development stages. - (IKR)
  • 2011
  • Alpes ; Analyse spatiale ; Bassin-versant ; Définition ; Europe ; Géomorphologie ; Montagne ; Méthodologie ; Relief ; Unité orographique
  • According to given definitions, culminations can be identified with the orographical centers of mountain groups of different sizes. Investigating a mountain range, the method presented starts with the identification of surrounding basins
  • , their basin axis, and the main ridge. The first step in the dividing process is to identify the first-order ridges between the catchment areas of all basins. Based on the selected basins, the resulting parts of the mountain range can be regarded
  • as orographical units. The second-order division starts the same way: The main basins are divided into a number of second-order basins, chosen among basins of bigger rivers, joining the main ridge or a first-order ridge and running directly down to the axis
  • of the main basins. So called geographical (mountain) groups can be developed from the systematical groups by adaptation. Only 6 basic cases of adaptation are possible.
  • 2011
  • Spatial variation in drainage characteristics and geomorphic instantaneous unit hydrograph (GIUH); implications for watershed management—A case study of the Varada River basin, Northern Karnataka
  • Agroclimatologie ; Aménagement hydraulique ; Bassin-versant ; Drainage ; Erosion ; Géomorphométrie ; Inde ; Karnātaka
  • Fifth order basins from different agroclimatic zones in the Varada River basin were selected to understand the spatial variation in drainage characteristics. These sub-basins show significant differences in their morphometric properties
  • such as basin area, drainage density, bifurcation ratio, circularity ratio, constant of channel maintenance etc. These differences reflect variation in the hydrological process and geomorphologic instantaneous unit hydrograph (GIUH) of different sub-basins
  • and can be used to understand watershed management aspects. Fifth order sub-basin in the Southern Transition agroclimatic zone is potential for artificial recharge programs. Sub-basins in the Hilly non-forest zone on the north are ideal for surface water
  • 2011
  • Geomorphic evolution of Medziphema intermontane basin and Quaternary deformation in the schuppen belt, Nagaland, NE India
  • Arunachal Pradesh ; Bassin d'entremont ; Chevauchement tectonique ; Faille ; Géomorphodynamique ; Inde ; Montagne ; Mouvement vertical ; Quaternaire ; Tectonique
  • Arunachal Pradesh ; Earth surface processes ; Fault ; India ; Intermontane basin ; Mountain ; Quaternary ; Tectonic thrust ; Tectonics ; Vertical movement
  • The Medziphema intermontane basin developed in the schuppen belt of Nagaland, Northeast India, has been studied to understand its tectonic and geomorphic evolution on the basis of field evidence and morphometric parameters. Major part of the basin
  • 2011
  • Effect of ENSO events on sediment production in a large coastal basin in northern Peru
  • AVHRR ; Années 1976-2005 ; Bassin-versant ; Bilan sédimentaire ; Dynamique de la végétation ; Ecoulement fluvial ; El Niño ; Indice de végétation ; Littoral ; Oscillation climatique ; Pérou ; Pérou du Nord ; Sédimentation littorale ; Série
  • The Catamayo-Chira basin is an interesting case study for investigating these geomorphic implications. The aims were: (i) to study the effect of ENSO on stream flow and sediment yields in the basin, (ii) to investigate if ENSO events affect sediment
  • yields in the post-ENSO period and (iii) to understand which factors control the ENSO and post-ENSO basin response. The analysis indicates the increase of vegetation growth in the lower basin is not the main reason explaining considerable sediment flux
  • decrease in post-ENSO periods. During strong ENSO events, sediment in alluvial stores in the lower part of the basin is removed due to enlarging and deepening of channels. The decrease in sediment export will last for several years until the equilibrium
  • 2011
  • Bassin-versant ; Chevauchement tectonique ; Faille ; Géomorphométrie ; Himalaya ; Inde ; Kali ; Néotectonique ; Quaternaire ; Tectonique ; Terrasse fluviatile
  • A technique of drainage basin morphometry analysis that quantifies basin symmetry has been applied to detect the tilting of areas occupied by Quaternary deposits in Eastern Kumaun Himalaya. The Drainage Basin symmetry vectors, calculated from
  • topographic profiles of parts of the Kali River Basin bring out preferred stream migration in response to Quaternary ground tilting of southeast and northwest directions across the North Almora Thrust. An oblique-slip type of movement along the fault has been
  • 2011
  • Protecting aquatic ecosystems in heavily allocated river systems : the case of the Oldman River Basin, Alberta
  • Alberta ; Bassin fluvial ; Canada ; Eau ; Ecologie politique ; Ecosystème aquatique ; Gestion de l'eau ; Irrigation ; Politique culturelle ; Protection de l'environnement
  • Alberta ; Aquatic ecosystem ; Canada ; Cultural policy ; Environmental conservation ; Irrigation ; Political ecology ; River basin ; Water ; Water management
  • L'accent est mis sur les facteurs qui interviennent dans la mise en oeuvre de politiques de protection des écosystèmes aquatiques du bassin de la rivière Oldman, qui alimente une région semi-aride du sud de l'Alberta. Nécessité de prendre en compte
  • 2011
  • Tectono-stratigraphic evolution of a basin generated by transpression : the case of the Early Pliocene Lascari Basin (northern Sicily)
  • In the present paper integrated stratigraphy and structural analyses are aimed at the description of a synsedimentary transpressional tectonic event, driving the onset and development of the Early Pliocene Lascari Basin, located NW of the Madonie
  • 2011
  • Utilisation de la force hydraulique dans le bassin de la plaine de Pannonie depuis le 11ème siècle jusqu'en 1920
  • Alföld ; Aménagement hydraulique ; Bassin sédimentaire ; Cours d'eau ; Danube ; Energie hydraulique ; Hongrie ; Siècles 11-20 ; Utilisation de l'eau
  • Danube ; Great Hungarian Plain ; Hungary ; Hydraulic works ; Sedimentary basin ; Stream ; Water energy ; Water use
  • The hydropower of the Carpathian Basin was first utilised by mills for grinding cereals in the 11th century. More sophisticated power machines, such as the pumps used in mines, lumber mills, forge mills and other machinery of this type, first
  • of the utilisation of hydropower in the Carpathian Basin and in Hungary. - (AM)
  • 2011
  • Aspects of integrated water resources management in river basins influenced by mining mctivities in lower Lusatia
  • Allemagne ; Bassin fluvial ; Bassin minier ; Brandenburg ; Changement climatique ; Cours d'eau ; Environnement ; Gestion de l'eau ; Hydrologie ; Industrie extractive ; Lausitz ; Ressource en eau
  • Brandenburg ; Climatic change ; Environment ; Extractive industry ; Germany ; Hydrology ; Mining area ; River basin ; Stream ; Water management ; Water resources
  • Les AA. analysent les aspects d'une gestion intégrée des ressources en eau dans les bassins fluviaux de l'Elbe et de l'Oder dans la région de la Basse-Lusace en Allemagne. Pour y faire face, ils préconisent dans un premier temps la reconversion des
  • puits miniers en réservoir de stockage mais cette solution s'avère insuffisante, particulièrement en période de faible écoulement des eaux. C'est pourquoi ils proposent de transférer de l'eau du bassin versant de l'Elbe, ce qui permettrait de répondre
  • 2011
  • The reproduction of the Klamath basin : struggle for water in a changing landscape
  • Bassin-versant ; California ; Conditions de vie ; Conflit ; Dynamique du paysage ; Eau ; Etats-Unis ; Foncier ; Gestion de l'eau ; Klamath ; Oregon ; Paysage ; Saumon ; Tribu ; Usage agricole ; Utilisation de l'eau
  • The Klamath River flows through southern Oregon and northern California, from the Upper K. Basin to the Lower K. Basin. The A. shows how the livelihoods in these two sub-basins have competed for water resources to produce a Klamath Basin
  • 2011
  • Impact of polder system on flooding in the Rolava River basin
  • Aménagement hydraulique ; Bassin-versant ; Crue ; Débit de pointe ; Lutte contre les inondations ; Modélisation ; Pluie torrentielle ; Tchèque république
  • to the headwater part of the Rolava River basin in the Ore Mountains. The main aim was to evaluate the potential impact of the dry reservoirs on peak discharge decrease during two known rainfall events in September 2007 and in August 2006. - (EN)
  • 2011
  • Appalachian Mountains ; Bassin-versant ; Distribution spatiale ; Erosion ; Etats-Unis ; Evolution post-orogénique ; Lit fluvial ; Modèle ; Modèle conceptuel ; Mouvement de masse ; North Carolina ; Pente de versant ; Profil longitudinal ; Rupture de
  • Values of normalized hypsometry, hypsometric integral, and mean slope vs elevation are used in south-western North Carolina for 14 tributary basins and the Cullasaja basin as a whole to characterize landscape evolution following upstream knickpoint
  • migration. Results highlight the existence of a transient spatial relationship between knickpoints present along the fluvial network of the Cullasaja basin and adjacent hillslopes. This transient effect of knickpoint-driven channel incision on basin
  • hillslopes is captured by measuring the relief, mean slope steepness, and mass movement frequency of tributary basins and comparing these results with the distance from major knickpoints along the Cullasaja River. A conceptual model of area–elevation
  • 2011
  • Mass transfers, sediment budgets and relief development in cold environments: Results of long-term geomorphologic drainage basin studies in Iceland, Swedish Lapland and Finnish Lapland
  • Bassin-versant ; Bilan sédimentaire ; Changement climatique ; Couverture végétale ; Dynamique de versant ; Finlande ; Islande ; Laponie ; Lithologie ; Mouvement de masse ; Suède ; Zone froide
  • By the combined, quantitative recording of the relevant denudative slope processes and stream work in 4 selected drainage basins, information on the absolute and relative importance of the different denudative processes is collected. The direct
  • comparison of the annual mass transfers occurring within the 4 investigated drainage basins summarises that there are differences between process intensities and the relative importance of different denudative processes within the study areas in Eastern
  • Iceland, Swedish Lapland and Finnish Lapland. The major controls of these detected differences are (i) climate, (ii) lithology, (iii) relief and (iv) vegetation cover. The applied drainage basin-based approach seems to be effective for analysing
  • 2011
  • The Southeast France basin during Late Cretaceous times : the spatiotemporal link between Pyrenean collision and Alpine subduction
  • Bassin sédimentaire ; Crétacé ; France ; France du Sud-Est ; Géologie régionale ; Géomorphodynamique ; Modèle ; Tectonique
  • Cretaceous ; Earth surface processes ; France ; Model ; Regional geology ; Sedimentary basin ; South-Eastern France ; Tectonics
  • The AA. present and discuss the Late Cretaceous evolution of the Southeast France Basin (SEFB) owing the Pyrenean and Alpine belts. The available geological data (isopachs maps, boreholes and field data) were integrated in 3D GeoModeller software
  • to build a 3D model of the Cenomanian to Campanian sedimentary series of the Late Cretaceous period. A significant eastward marine regression during the Late Cretaceous is revealed. According to the location of the Late Cretaceous depocenters, 2 sub-basins
  • 2011
  • La gestion du risque inondation en France vecteur de territorialité : l'exemple de l'Entente Oise-Aisne, bassin versant de l'Oise
  • Bassin parisien ; Bassin-versant ; Crue ; France ; Gestion du risque ; Identité territoriale ; Lutte contre les inondations ; Oise
  • Bassin parisien ; Flood ; Flood control ; France ; Oise ; Risk management ; Territorial identity ; Watershed
  • projet global de lutte contre les inondations pour l'ensemble du bassin-versant, qui devient un territoire fonctionnel. Tous les acteurs sont responsabilisés, et cette démarche participative contribue à une réelle politique d'intelligence territoriale.
  • 2011
  • Identification de petits bassins versants prédisposés à des crues éclair, examples dans les zones de piedmont de Dynów, Strzyżów et Przemyśl
  • Analyse multivariée ; Bassin-versant ; Carpates ; Crue ; Crue éclair ; Densité de drainage ; Piedmont ; Pluie torrentielle ; Pologne ; Propriétés du sol ; Précipitation ; Risque naturel ; Utilisation du sol ; Vulnérabilité
  • This article presents a procedure, by which to identify small drainage basins vulnerable to the propagation of abrupt flood waves, and hence to flash flooding, in response to short-duration episodes of very intensive rainfall. Long known
  • for such local flooding events, basins in the Carpathian were described by reference to a large number of physiographic characteristics of importance to the generation of abrupt flood-wave phenomena. Features found to be associated with an enhanced probability
  • of such flash flooding (thanks to faster transformation of precipitation into outflow) included: basin area, slope and changes in elevation along the valley, but also land-use structure, physical properties of the soil and the configuration and density
  • of the river network. The results of multidimensional analysis provided for the identification of types of basin vulnerable to the flood-wave formation in question. – (BJ)
  • 2011
  • The question of Communist land degradation : new evidence from local erosion and basin-wide sediment yield in Southwest China and Southeast Tibet
  • Bassin-versant ; Chine ; Erosion fluviatile ; Hydrologie fluviale ; Précipitation ; Qinghai ; Relief ; Sédimentologie ; Tibet ; Transport sédimentaire ; Utilisation du sol
  • Les AA. étudient la dégradation des sols dans le bassin hydrographique du fleuve Jaune et du Yangtze dans le Sud-ouest de la Chine et du Tibet. Ils analysent les quantités de transport sédimentaire et leurs variations interannuelles. Ce transport
  • est corrélé à la zone supérieure du bassin, aux précipitations annuelles moyennes, à la densité de population ainsi qu'à la fraction des terres cultivées. Les résultats montrent que la variabilité du rendement sédimentaire annuel moyen diminue selon la
  • taille du bassin, ce qui laisse supposer que de grandes quantités de sédiments peuvent servir efficacement contre des évènements majeurs.
  • 2011
  • Morphology and geomorphological significance of relict landslides in the Tertiary basin of Puy-en-Velay (Massif Central, France)
  • Auvergne ; Basalte ; Bassin sédimentaire ; Cénozoïque ; Distribution spatiale ; Erosion ; France ; Glissement de terrain ; Géomorphogenèse ; Géomorphométrie ; Haute-Loire ; Lithologie ; Massif Central ; Puy-en-Velay ; Versant
  • Auvergne ; Basalt ; Cenozoic ; Erosion ; France ; Geomorphogenesis ; Geomorphometry ; Haute-Loire ; Landslide ; Lithology ; Massif Central ; Sedimentary basin ; Slope ; Spatial distribution
  • Etude de glissements de terrain anciens dans le bassin tertiaire du Puy-en-Velay et de leur signification morphologique. Mise en évidence de 2 types de glissement dans des contextes morphostructuraux identiques mais se différenciant par l'âge de la
  • l'âge de la couverture basaltique qui détermine indirectement le degré de dissection des bassins versants. Ces glissements représentent un élément moteur du recul des bordures de plateaux volcaniques et de l'élargissement des vallées. Ils constituent un
  • des éléments majeurs de l'évolution morphogénique post-volcanisme dans le bassin du Puy.
  • 2011
  • Mapping runoff based on hydro-stochastic approach for the Huaihe River Basin, China
  • Bassin-versant ; Bilan hydrologique ; Cartographie ; Chine ; Chine du Sud-Est ; Ecoulement ; Huaihe ; Krigeage ; Modèle stochastique ; Ressource en eau
  • This paper aims at developing the hydro-stochastic approach for producing choropleth maps of average annual runoff and computing mean discharge along the main river network for a large-scale basin. The approach applied to mean annual runoff is based
  • on geostatistical interpolation procedures coupled with water balance and data uncertainty analyses. It is proved by an application in the upstream at Bengbu in the Huaihe River Basin, China. Hydro-stochasitic approach in a first step interpolates to a regular grid
  • 2011