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PORTAIL D'INFORMATION GÉOGRAPHIQUE

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  • Greatest lake period and its palaeo-environment on the Tibetan Plateau
  • China ; Lake ; Lake level ; Monsoon ; Palaeo-environment ; Palaeoclimate ; Palaeolake ; Plateau ; Tibet
  • The greatest lake period means that the lakes are in the stage of their maximum areas. As the paleolake shorelines are widely distributed in the lake basins on the Tibetan Plateau, the lake areas during the greatest lake period may be inferred
  • by the last highest lake shorelines. They are several even ten times larger than that at present. The occurence of maximum areas of lakes marked the very humid period on the Plateau and was also related to the stronger summer monsoon during that period.
  • Late Pleistocene and late Holocene lake highstands in the Pyramid Lake subbasin of Lake Lahontan, Nevada, USA
  • C 14 dating ; Lake ; Lake level ; Nevada ; Palaeoclimate ; Quaternary ; Shoreline ; Stratigraphy ; United States of America
  • Shoreline geomorphology, shoreline stratigraphic position, and radiocarbon dates of organic material obtained from trench and quarry exposures provide evidence for 2 significant post-Lahontan highstand lake transgressions in the Pyramid Lake
  • subbasin. The AA. briefly compare their findings to previously published post-highstand Lahontan lake-level curves and other regional paleoclimate indicators.
  • The Laka lake
  • Bathymetry ; Czech Republic ; Lake ; Morphometry ; Mountain ; Silting ; Watershed
  • General information about the Šumava Mountain lakes, about the smallest one - the Laka Lake. The main aim was establish the previse altitude of the lake Laka and to draw its ground plan and bathymetric map. Geographic position and morphometric
  • characteristics of catchment area are described as well. Differently from the other Šumava lakes, the Laka Lake is interesting by its relatively intensive silting processes. - (MS)
  • Lake Tai : the limnology of a shallow lake in China in Shallow lakes environment. (L'environnement des lacs eutrophes)
  • Glacial-lake outburst erosion of the Grand Valley, Michigan, and impacts on glacial lakes in the Lake Michigan Basin
  • Catastrophe ; Flood ; Glacial erosion ; Glacial features ; Glacial lake ; Ice breakup ; Lake level ; Michigan ; Palaeogeography ; Quaternary ; United States
  • The purpose of this paper is to document the outburst origin of the Grand Valley and to explore the implications of these events upon interpretations of the timing and processes of lake-leved changes in glacial Lake Chicago.
  • Lake Vostok behaves like a captured lake and may be near to creating an Antarctic jökulhlaup
  • Antarctica ; Cold area ; Glacial lake ; Ice sheet ; Lake ; Model ; Palaeo-environment
  • This paper presents the first test of the captured ice shelf (CIS) hypothesis using field data from a modern ice sheet, by comparing the predicted geometry with that of Lake Vostok, the planet's largest existing sub-glacial lake, situated under
  • the East Antarctic ice sheet. It is showed that Lake Vostok agrees with this hypothesis. The result also implies that the lake may well be of pre-glacial origin, and that it may have experienced jökulhlaups during previous interglacials.
  • Stream geomorphology in a mountain lake district : hydraulic geometry, sediment sources and sinks, and downstream lake effects
  • Channel geometry ; Drainage network ; Glacial lake ; Idaho ; Lake ; Mountain ; Stream ; United States of America ; Watershed
  • Lakes in the Sawtooth Mountains, Idaho, were created during glaciation and the AA. sought to understand how and to what extent glacial morphology and lake disruption of fluxes control stream physical form and functions. First, they described
  • downstream patterns in channel form including analyses of sediment entrainment and hydraulic geometry in one catchment with a lake. Furthermore, they collected data from 33 stream reaches throughout the region to compare channel form and functions among
  • catchments with lakes, meadows (filled lakes), and present lakes. The results suggest that sediment sinks, such as lakes, in addition to sources, such as tributaries, are important local controls on mountain drainage networks.
  • Mladotice lake (Czech republic) - Siltation dynamics in the lake basin
  • Bathymetry ; Bohemia ; Czech Republic ; Lacustrine sedimentation ; Lake ; Limnology ; Silting
  • The Mladotice lake is the four largest and also the youngest lake in the country. It is located on the Mladotice stream, the left bank tributary of the Střela River in the west Bohemia. Extreme rains in May 1872 and the construction of the railway
  • (Plzeň-Žatec) caused the slide. The block type movements dammed in several days the valley. The new lake was deep 21 m. Under several investigations are most important the measurements in 1972. The last data come from the bathymetric survey in 1990
  • . The Mladotice lake presents an unique natural phenomenon which however progresses fast to its vanish. - (MS)
  • Changes in the bathymetry and volume of glacial Lake Agassiz between 11,000 and 9300 C 14 yr B.P.
  • Amérique du Nord ; Bathymétrie ; Déglaciation ; Lac ; Lac glaciaire ; Lake Agassiz ; Modèle ; Niveau lacustre ; Paléo-environnement ; Quaternaire ; Sédiment lacustre
  • Bathymetry ; Deglaciation ; Glacial lake ; Lacustrine sediment ; Lake ; Lake level ; Model ; North America ; Palaeo-environment ; Quaternary
  • The volume and surface area of glacial Lake Agassiz varied considerably during its 4000-year history. Computer models for 7 stages of Lake Agassiz were used to quantify these variations over the lake's early history, between about 11,000 and 9300 C
  • Changes in the bathymetry and volume of glacial Lake Agassiz between 9200 and 7700 C 14 yr B.P.
  • Bathymetry ; Holocene ; Lake ; Lake level ; Model ; North America ; Palaeogeography ; Palaeohydrology ; Proglacial lake
  • Computer reconstructions of the bathymetry of the lake were used to quantify variations in the size and form of Lake Agassiz during its final 2 phases (the Nipigon and Ojibway phases). The estimates of Lake Agassiz volumes and releases presented
  • here provide a quantitative basis for evaluating the impact that Lake Agassiz may have had on North America and on the oceans into which it flowed.
  • Atlas of Oregon Lakes.
  • A survey and classification of 202 lakes and reservoirs in the northwestern state of Oregon. Water quality is the focus of the report. All lakes are listed alphabetically with tables of attributes, photographs, drawings, maps, and diagrams
  • of temperature and oxygen. A substantial introduction provided to Oregon's lakes and the atlas. (DOH).
  • Some limitations of water quality models for large lakes: a case study of Lake Ontario
  • Amérique du Nord ; Eau ; Great Lakes ; Géochimie ; Géographie physique ; Lac ; Lac Ontario ; Modèle ; Phosphore ; Prévision ; Qualité de l'eau ; Simulation
  • A reevaluation of the timing and causes of high lake phases in the Lake Michigan basin
  • Datation C14 ; Déglaciation ; Etats-Unis ; Géographie physique ; Holocène ; Lac ; Lake Michigan ; Niveau lacustre ; Postglaciaire ; Quaternaire
  • The Plešné Lake
  • Bathymetric chart ; Czech Republic ; Lake ; Morphometry ; Watershed
  • The geographic research on the Šumava lakes has a long tradition at the Charles University of Prague. Tha main aim was to establish the exact altitude of Plešné Lake and to draw its ground plan and a bathymetric map. Geographic position amd
  • Classic landforms of the Lake District.
  • England ; Guide géomorphologique ; Géographie physique ; Géomorphologie ; Lake district ; Royaume-Uni ; Socle ; Volcanisme
  • Lake Michigan bluff recession
  • Etats-Unis ; Falaise ; Great Lakes ; Géographie de l'Amérique ; Lac ; Ligne de rivage ; Michigan, lac ; Récession
  • Paleolimnology of two lakes in the Klutlan Glacier region, Yukon Territory, Canada
  • Geochemical and paleontological studies of surface sediment to a serie of lakes on progressively older moraines provide baseline information for comparing successive levels of lake sediment cores from older moraines. Results indicate that the time
  • of lake initiation seldom reflects moraine age. Even on the oldest moraine (Harris Creek), lake basins are presently forming. Vegetation and soil development play an important but secondary role in determining the character of lake sediments| rapid
  • subsidence can convert humic-water lakes surrounded by second-generation spruce forests into turbid-water lakes with unstable, slumping margins. A detailed paleolimnological study of two lakes, one on the unglaciated upland and another in an outwash channel
  • penetrating the oldest moraine, revealed progressive limnologic changes through time, suggesting that their basins were stable for 1200 and 400 yr, respectively. The changes in diatom stratigraphy of these lakes appear to relate to natural limnological changes
  • associated with lake maturation and accumulation of nutrients as well as to changes in the surrounding vegetation and soils.
  • Holocene lake-level fluctuations of Lake Aricota, southern Peru
  • Andes ; C 14 dating ; Climatic variation ; Comparative study ; Holocene ; Lake ; Lake level ; Palaeo-environment ; Peru ; Quaternary
  • Lacustrine deposits exposed around Lake Aricota, a lake dammed by debris flows, provide a middle to late Holocene record of lake-level fluctuations. Chronological context for shoreline deposits was obtained from radiocarbon dating of vascular plant
  • remains and other datable material with minimal C 14 reservoir effects (
  • with a major lowstand at Lake Titicaca. Comparisons with other marine and terrestrial records highlight emerging contradictions over the nature of mid-Holocene climate in the central Andes.
  • Evaluating trophic status and restoration procedures of a polluted lake, Lake Kastoria, Greece
  • The present study deals with a hydrological analysis of the lake, an estimation of nutrient loading with the evaluation of its trophic status based on the total phosphorus input, and finally with remediation techniques applicable to the lake.
  • Shoreline forms and deposits in Gallocanta Lake (NE Spain)
  • Climatic variation ; Lacustrine sediment ; Lake ; Lake level ; Quaternary ; Semi-arid area ; Shoreline ; Spain ; Zaragoza
  • This study attempts to deduce the present and past shoreline dynamics of a small shallow lake. Gallocanta Lake is located in the central Iberian Chain, NE Spain, within a typically Mediterranean semi-arid region.