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1.
M. P. Petrov A. Yu. Terzhevik R. E. Zdorovennov G. E. Zdorovennova 《Water Resources》2006,33(2):135-143
The thermal structure of a shallow lake in the first month of its freeze up is shown to vary widely from year to year. The rate of temperature increase at different horizons of the water mass in early winter is evaluated, and warming of shallow and deep-water areas in the lake are shown to be uneven. The distribution of near-bed temperature as a function of water depth in the first weeks of freeze up features wide variations, though this relationship becomes more regular over time. Estimates of the effective thermal diffusivity are given for different seasons. The main periods in the variations in the heat content of water column in early winter are estimated. 相似文献
2.
Laurentiu Danciu Karin Şeşetyan Mine Demircioglu Levent Gülen Mehdi Zare Roberto Basili Ata Elias Shota Adamia Nino Tsereteli Hilal Yalçın Murat Utkucu Muhammad Asif Khan Mohammad Sayab Khaled Hessami Andrea N. Rovida Massimiliano Stucchi Jean-Pierre Burg Arkady Karakhanian Hektor Babayan Mher Avanesyan Tahir Mammadli Mahmood Al-Qaryouti Doğan Kalafat Otar Varazanashvili Mustafa Erdik Domenico Giardini 《Bulletin of Earthquake Engineering》2018,16(8):3465-3496
3.
L. A. Rukhovets G. P. Astrakhantsev A. N. Mal’gin V. N. Poloskov A. Yu. Terzhevik N. N. Filatov 《Water Resources》2006,33(5):511-522
The results of numerical modeling of Onega Lake climatic circulation are presented. The model used in this study was developed earlier and successfully applied to the reproduction of large-scale hydrodynamical processes in Ladoga Lake. The obtained results are of importance for the development of both models of nonreactive pollutant transport and ecosystem models of the water body. The developed model can be used to calculate currents and temperature fields for individual scenarios of external impacts on the water body, and the results of calculation of the climatic circulation can serve as initial approximations for scenario-based calculations. 相似文献
4.
Anatoly A. Nikitin Boris D. Plyushchenkov Arkady Yu. Segal 《Geophysical Prospecting》2016,64(5):1335-1349
We derived the velocity and attenuation of a generalized Stoneley wave being a symmetric trapped mode of a layer filled with a Newtonian fluid and embedded into either a poroelastic or a purely elastic rock. The dispersion relation corresponding to a linearized Navier–Stokes equation in a fracture coupling to either Biot or elasticity equations in the rock via proper boundary conditions was rigorously derived. A cubic equation for wavenumber was found that provides a rather precise analytical approximation of the full dispersion relation, in the frequency range of 10?3 Hz to 103 Hz and for layer width of less than 10 cm and fluid viscosity below 0.1 Pa· s [100 cP]. We compared our results to earlier results addressing viscous fluid in either porous rocks with a rigid matrix or in a purely elastic rock, and our formulae are found to better match the numerical solution, especially regarding attenuation. The computed attenuation was used to demonstrate detectability of fracture tip reflections at wellbore, for a range of fracture lengths and apertures, pulse frequencies, and fluid viscosity. 相似文献
5.
A. Yu. Terzhevik N. I. Pal’shin S. D. Golosov R. E. Zdorovennov G. E. Zdorovennova A. V. Mitrokhov M. S. Potakhin E. A. Shipunova I. S. Zverev 《Water Resources》2010,37(5):662-673
Long-term observational data on a small, shallow Lake Vendyurskoe (Karelia) were used to analyze the space and time dissolved-oxygen
dynamics in winter. Biochemical consumption was found to play a leading role in the reduction of dissolved-oxygen concentration
in lake water in winter. The total decrease in the amount of dissolved oxygen since the beginning of under-ice period until
mid-April was shown to amount to one third of the initial value. The year-to-year variations in winter oxygen consumption
are ~10%, suggesting the process to be stable in the years of observations. The rate of oxygen consumption and variations
in dissolved oxygen content of lake water in winter were evaluated. The analysis and literary data allow us to conclude that
the hydrophysical processes taking place in shallow lakes in winter have a considerable effect on their oxygen regime. 相似文献
6.
N. I. Palshin S. R. Bogdanov G. E. Zdorovennova R. E. Zdorovennov T. V. Efremova B. Z. Belashev A. Yu. Terzhevik 《Water Resources》2018,45(5):695-705
The high-precision observational data on water temperature obtained during seven winters in a small boreal lake are considered. The spectral analysis revealed that the oscillations with a period of about 27 min prevailed in a water column. This period is close to the theoretical estimate of the first mode of the longitudinal barotropic seiche. The variability of temperature oscillations, vertical velocity, and displacement of isotherms suggest the presence of short internal waves along with seiches. The amplitude of the internal waves is an order of magnitude greater than that of seiches, and the length of internal waves is two orders of magnitude less than the linear extent of the lake. 相似文献
7.
Arkady Tsyrulnikov Igor Tuuling Volli Kalm Tiit Hang Tom Flodén 《Boreas: An International Journal of Quaternary Research》2012,41(4):673-689
The Lateglacial and postglacial sequence in the northern Gulf of Riga is sedimentologically subdivided into nine distinctive layers. In the seismo‐acoustic sequence these layers are correlated with seven seismic/acoustic units, which largely reflect different stages in the development of the Baltic Sea. A uniform layer of the Late Weichselian till, a layer of waterlain glacial diamicton (WGD), a varved succession of the Baltic Ice Lake, a brackish‐water/freshwater sandy/silty clay of Yoldia Sea, a FeS‐rich layer of Ancylus Lake and discordantly bedded sand of the Litorina Sea and present‐day gyttja are revealed both in sediment cores and in acoustic recordings. In general, the lateral extent of the distinguished sediment layers is gradually shrinking upwards in the Quaternary sequence towards the deepest, central depression of the gulf. Two distinguished regional discontinuities divide the Lateglacial and postglacial sediment sequence into three allounits: glacial diamicton deposits in the lower part; ice‐proximal WGD, glaciolacustrine and postglacial lake/marine deposits in the middle; and brackish‐water marine deposits in the uppermost part of the sequence. The presented detailed seismostratigraphic subdivision of the Quaternary sediment sequence of the Gulf of Riga permits a correlation/comparison with similar sequences across the Baltic Sea and in other former glaciated basins. 相似文献
8.
Filatov N. N. Zdorovennov R. E. Terzhevik A. Yu. Hutter K. 《Doklady Earth Sciences》2011,441(2):1715-1718
Comprehensive experiments on the large stratified Lake Onega have been implemented for the first time. Generation and destruction
of nonlinear internal waves under different meteorological conditions have been studied. 相似文献
9.
Physics of seasonally ice-covered lakes: a review 总被引：2，自引：0，他引：2
10.
Laws of formation and criteria for predicting nickel content in weathering crusts of east Kazakhstan
Boris A. Dyachkov Bakytzhan B. Amralinova Indira E. Mataybaeva Alla V. Dolgopolova Arkady I. Mizerny Anastassiya P. Miroshnikova 《Journal of the Geological Society of India》2017,89(5):605-609
The article considers from the theoretical point of new global tectonics the geological conditions of formation, peculiar features of material composition, and criteria for predicting deposits of nickeliferous weathering crusts of east Kazakhstan. According to geotectonic zoning, this territory includes geological structures of the Big Altai (BA), which is part of the central Asian mobile belt. The ore-controlling role is assigned to the area of global interaction of the Kazakhstan and Siberian paleocontinents during the stage of the Hercynian collision (Ñ1-Ñ3) followed by the formation of the Zaisan suture zone, the structure of which is represented by the Charsky-Gornostaevsky ophiolite belt (suture stitch). During the Hercynian cycle of tectogenesis, main gold fields of the regions appeared in the Zaisan suture (gold-quartz, gold-sulphide, gold-listvenite, etc.) in a collision situation, controlled by a system of deep faults of the crust and mantle type. In similar tectonic environment, large stockwork gold deposits were formed in Rudny Altai, north Kazakhstan, and other regions. During the Cimmerian cycle, the residual weathering crust deposits of Au, Ti-Zr, Ni-Co were formed in the region of continental rifting. The article emphasizes the spatial association of silicate cobalt-nickel deposits to the outputs of serpentinized ultrabasites of the Charsky-Gornostaevsky belt and provides a characteristic of the geological structure and material composition of nickel content in ores of the Belogorskoye and Gornostaevskoye standard deposits. Expansion of prospects depends on the possibility of growth of reserves of cobalt and nickel ores on the flanks and deep horizons of the known ore fields and search for buried deposits in prospective areas determined by geological and geophysical studies. 相似文献