نتایج جستجو برای: lake level fluctuations

تعداد نتایج: 1182537  

2012
N. M. Velpuri G. B. Senay K. O. Asante

Lake Turkana is one of the largest desert lakes in the world and is characterized by high degrees of interand intra-annual fluctuations. The hydrology and water balance of this lake have not been well understood due to its remote location and unavailability of reliable ground truth datasets. Managing surface water resources is a great challenge in areas where in-situ data are either limited or ...

2003
Lesleigh Anderson Mark B. Abbott Bruce P. Finney Mary E. Edwards

Lake-level variations at Marcella Lake, a small, hydrologically closed lake in the southwestern Yukon Territory, document changes in effective moisture since the early Holocene. Former water levels, driven by regional palaeohydrology, were reconstructed by multiproxy analyses of sediment cores from four sites spanning shallow to deep water. Marcella Lake today is thermally stratified, being pro...

2017
Lora R. Stevens Jeffery R. Stone Josh Campbell Sherilyn C. Fritz

A 2200-yr long, high-resolution (~5 yr) record of drought variability in northwest Montana is inferred from diatoms and δ18O values of bio-induced carbonate preserved in a varved lacustrine core from Foy Lake. A previously developed model of the diatom response to lake-level fluctuations is used to constrain estimates of paleolake levels derived from the diatom data. High-frequency (decadal) fl...

2004
D. Delvaux

Lake Malawi (Nyasa) is one of the few deep-water long-lived lakes that presently exist on earth. It lies in an uncompensated tectonic graben, controlled by differential vertical movements between the rift basin who subsides and the rift shoulders who are uplifted. Active tectonics is the major factor controlling the development and persistence ofthose deep lakes. For Lake Malawi (Nyasa), climat...

2006
John J. Clague Brian H. Luckman Richard D. Van Dorp Robert Gilbert Duane Froese Alberto V. Reyes

The level of Kluane Lake, the largest lake in Yukon Territory, was lower than at present during most of the Holocene. The lake rose rapidly in the late seventeenth century to a level 12 m above present, drowning forest and stranding driftwood on a conspicuous high-stand beach, remnants of which are preserved at the south end of the lake. Kluane Lake fell back to near its present level by the en...

Journal: :Boreas 2021

Lake-level reconstructions are a key tool in hydro-climate reconstructions, based on the assumption that lake-level changes primarily reflect climatic changes. Although it is known land cover can affect evapotranspiration and groundwater formation, this factor commonly receives little attention interpretation of past To address issue more detail, we explore effects change Holocene fluctuations ...

Journal: :Environmental science & technology 2004
K David Hambright Werner Eckert Peter R Leavitt Claire L Schelske

Current paradigms of reservoir ontogeny suggest that water-level fluctuations may increase sedimentary nutrient release, causing long-term eutrophication of water bodies formed by dryland flooding. Less is known of the changes in nutrient status following conversion of natural lakes into reservoirs. Here, we use historical hydrological and limnological data and paleolimnological records of sedi...

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