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.
Bathymetry ; Czech Republic ; Glacial lake ; Lake ; Lake level ; Limnology ; Thematic map
The main aim of research was to make a precise ground plan to characterize the depth conditions of the lake basin and to determine the altitude of the lake level. The bathymetric maps of the second largest glacial lake in Czechia. - (MS)
Lake-bottom thermal regimes, Western Arctic Coast, Canada
Arctic Region ; Canada ; Cold area ; Comparative study ; Delta ; Lake ; Northwest Territories ; Permafrost ; Taiga ; Temperature ; Thermal regime ; Tundra
The aim of this paper is to report upon the interannual variation in lake-bottom temperatures in several tundra lakes on Richards Island, and to compare these lake-bottom temperatures with conditions in a lake south of tree line, alongside
the Dempster Highway near Inuvik, Northwest territories. The paper then considers the sensitivity of equilibrium talik geometry to variations in lake-bottom temperature.
New evidence for an extended occupation of the Provo shoreline and implications for regional climate change, Pleistocene Lake Bonneville, Utah, USA
C 14 dating ; Climatic variation ; Holocene ; Lake level ; Palaeo-environment ; Palaeolake ; Pleistocene ; Shoreline ; United States of America ; Utah
Lake Bonneville was a climatically sensitive, closed-basin lake that occupied the eastern Great Basin during the late Pleistocene. Radiocarbon data from this and other studies suggest that the lake oscillated at or near the Provo level much longer
than depicted by current models of lake level change. Radiocarbon data also suggest that the lake dropped from threshold control much more rapidly than previously supposed. These revisions to the Lake Bonneville hydrograph, coupled with independent
The influence of thermokarst disturbance on the water quality of small upland lakes, Mackenzie Delta region, Northwest Territories, Canada
Arctic Region ; Canada ; Cold area ; Delta ; Hydrochemistry ; Lake ; Northwest Territories ; Permafrost ; Thermokarst ; Tundra ; Water quality
Chemical data are presented for water from 22 lakes in small upland catchments (
) concentration of the pristine lakes is greater than the mean concentration of lakes disturbed by thermokarst slumping. Soluble materials released from degrading permafrost are transported to lakes by surface runoff, elevating concentrations in lake water
. The percentage of total basin area influenced by thermokarst is positively associated with ionic concentrations in lake water and inversely related to DOC.
The aims of this paper are to : identify thaw lakes and drained thaw lake basins (DTLBs) in the western Arctic Coastal Plain (ACP); develop several geometric shape metrics for lakes and basins, and perform statistically-based spatial
and morphometric analyses to compare lakes and basin metrics within and between 3 subregions of the ACP. The primary purposes are to determine if significant differences in shape metrics exist across space, to determine if such metrics can be used to discriminate
Utah's Great Salt Lake : a complex environmental-societal system
Ecosystem ; Environmental management ; Evaporation ; Hydrochemistry ; Lake ; Salt lake ; Society-environment relationship ; System analysis ; United States of America ; Utah
The Great Salt Lake is a highly complex system, consisting of physical and chemical lake properties and environmental and societal subsystems. Using a system approach, this article aims to identify some of the key components of this environmental
Classification ; Czech Republic ; Human impact ; Lake ; Water quality
Anthropogenic lakes constitute the most genetic groups of lakes in the country. The properties of water determine the potential utilization, such as in water supply, fishing, agricultural, industry or recreation nature. Five anthropogenic groups
of lakes in mining pits after exploitation are characterised. - (MS)
Competitiveness ; Hungary ; Lake ; Management ; Tourism
This paper reports about the quantity and quality of tourist potentials in the Lake Tisza region. Major changes of the tourist market since 1990 are monitored by settlements and empirical research aimed at the evaluation of tourist attractions
that was conducted in the summer of 2004 is presented. For the time being Lake Tisza is favoured by tourism policy. Tourism management and marketing has been organised in the region to support the efforts to maintain and increase competitiveness. - (JS)
Assessment of the spatial-temporal eutrophic character in the Lake Dianchi
China ; Degradation ; Eutrophication ; Guizhou ; Lake ; Plateau ; Water quality ; Years 1980-89 ; Years 1990-99 ; Yunnan
In this paper, the spatial and temporal eutrophication status of the Lake Dianchi was assessed. The comprehensive trophic state index was chosen to assess the trophic status of the Lake Dianchi in the past 13 years. The result reveals
High-temporal resolution analyses of pollen, chironomid, and lake-level records from Lake Lautrey, Jura Mountains, provide multi-proxy, quantitative estimates of climatic change during the Late-Glacial period in eastern France. The comparison
The late Quaternary limnological history of Lake Kinneret (Sea of Galilee), Israel
C 14 dating ; Climatic variation ; Geoarchaeology ; Geochronology ; Global change ; Israel ; Lacustrine sediment ; Lake ; Lake level ; Limnology ; Quaternary ; Salinity ; Shoreline ; Stratigraphy
The AA. reconstructed the limnological history (level and composition) of Lake Kinneret during the past 40,000 years and compared it with the history of the contemporaneous Lake Lisan from the aspect of the regional and global climate history
. The lake level reconstruction was achieved through a chronological and sedimentological investigation of rxposed sedimentary sections in the Kinnarot basin trenches and cores drilled at the Ohalo II archeological site. Shoreline chronology was established
Evidence for late-glacial ice dammed lakes in the central Strait of Magellan and Bahía Inútil, southernmost South America
C 14 dating ; Chile ; Glacial features ; Glacial lake ; Glaciolacustrine ; Lake level ; Lateglacial ; Palaeogeography ; Pollen diagram ; Strait ; Stratigraphy
This paper critically appraises the evidence for a succession of ice-dammed lakes in the central Strait of Magellan. The topographic configuration of islands and channels in the southern Strait of Magellan means that the presence of lakes provides
compelling constraints on the position of former ice margins. Lake shorelines and glacio-lacustrine sediments have been dated by their association with a key tephra layer. The apparent asymmetricl latitudinal response in glacier behaviour may reflect
Sediment transport, delta growth and sedimentation in Lake Nigardsvatn, Norway
Delta ; Glacial erosion ; Glacier retreat ; Lacustrine sedimentation ; Lake ; Norway ; Proglacial lake ; Sediment load ; Sediment transport ; Suspended load ; Varves
The lake, Nigardsvatn, has been studied since 1968 in order to obtain data on solid material carried by the meltwater stream from the glacier, both in suspension and as bottom load. Between 70 and 85% of the suspended sediment has been deposited
on the lake bottom, forming annual varves. The coarse material has been deposited in a delta, the formation of which started in 1968. Its growth, and hence the volume of total annual bottom load, has been surveyed annually for the past 36 years. In 1969
the entire bottom load was collected by building a fence-like net across the river. If conditions remain constant, the lake will be completely filled in about 500 years.
Optically stimulated luminescence dating of late Holocene raised strandplain sequences adjacent to Lakes Michigan and Superior, Upper Peninsula, Michigan, USA
Aeolian deposit ; C 14 dating ; Coastal environment ; Dating ; Holocene ; Lacustrine sediment ; Lake level ; Michigan ; Quaternary ; Thermoluminescence ; United States of America
This study evaluates the accuracy of optically stimulated luminescence to date well-preserved strandline sequences at Manistique Thompson bay (Lake Michigan), and Tahquamenon and Grand Traverse Bays (Lake Superior) that span the past-4500 yr
late Holocene strandplains adjacent to large lakes or oceans and ultimately to refine and resolve water-level history.
The most frequent methods used for mapping of lakes of natural or anthropogenic origin. The ways of mapping of shorelines and subsequent bathymetric measurements are described. The final format of maps are described as well. - (MS)
Holocene ; Lake ; Lake level ; Moisture ; Palaeobiogeography ; Palynology ; Pollen diagram ; Quaternary ; United States of America ; Vegetation dynamics
In this paper, Holocene lake-level changes and fossil pollen from Echo Lake, New Hampshire, are documented and the relationship between moisture-balance fluctuations and vegetation change in northern New England over the past 12,000 years
is examined. Ground-penetrating radar profiles and 5 sediment cores provide evidence for 2 periods of low water levels. The correlation between lake-level and vegetation change suggests that moisture availability, in addition to temperature, helps to shape
Changes of emergent aquatic macrophyte cover in seven large boreal lakes in Finland with special reference to water level regulation
Aerial photography ; Eutrophication ; Finland ; Lake ; Lake level ; Photointerpretation ; Twentieth Century
Black and white aerial photographs from 1947-1963 and colour, mainly infrared aerial photographs from 1996-2000 were used to study quantitative vegetation changes in 7 large lakes : Kemijärvi, Unnukka, Kallavesi, Päijänne, Näsijärvi, Pyhäjärvi
rapidly and over similar time periods to major emissions of pollutants. Current understanding of the processes of sedimentation and resulting distributions are reviewed. Some significant differences between sedimentation in lakes and reservoirs