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N. I. Alekseevskii K. M. Berkovich R. S. Chalov S. R. Chalov 《Geography and Natural Resources》2012,33(3):192-199
We assess the spatiotemporal changes in channel processes on rivers of Russia, determine the causes for vertical (incision or directional sediment accumulation) and horizontal (displacement of channel forms) deformations and show the distribution of stream channel of different morphodynamical types and with a different reconfiguration rate. The conditions are revealed, under which the channel types change over time. Particular emphasis is placed on the analysis of spatiotemporal changes in channels caused by anthropogenic disturbances and by direct technogenic interferences in the life of rivers (hydroelectric schemes, quarries in the river channels, and waterway dredging). 相似文献
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S. V. Chalov 《Astronomy Letters》2012,38(3):191-200
The spectra of energetic protons measured on the Voyager-1 and Voyager-2 spacecraft in the inner heliospheric shock layer can be explained in terms of the classical theory of the shock drift acceleration
of interstellar pickup protons with allowancemade for theirmultiple reflection from the front. The spacecraft entered this
region after the heliospheric termination shock crossing in 2004 and 2007, respectively. The large-scale variations of the
magnetic field direction near the shock front associated with the passage of sector structures through it are the decisive
factor in explaining the measurements. 相似文献
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Water Resources - The forked channel is a rare and poorly known type of branching channel, the distribution of flow in which is of key importance for water transport, economic activities, and water... 相似文献
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Water Resources - The Selenga River, which originates in Mongolia, contributes about 50% of the total inflow into Lake Baikal. Hydroclimatic development and abrupt landscape evolution due to... 相似文献
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Methods of water runoff calculation with insufficient hydrometeorological information are discussed. The chosen approaches are used to calculate mean annual runoff of Koryak Upland rivers, flow distribution over seasons and months, and to assess the characteristics of minimum and maximum runoff. The results of calculations served as a basis for assessing the volumes of ecologically sound runoff in rivers under the condition of placer deposit development. 相似文献
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The procedure for assessment developed in the paper for the conditions of northwestern, central, and southern European Russia
is an efficient means for comparative analysis of power lines in terms of individual and integral impact of hazardous hydrological
and slope processes on their vulnerability, for determining of the periodicity of monitoring observations and the composition
of such studies. 相似文献
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R. S. Chalov 《Water Resources》2012,39(1):82-89
Various schemes of within-year transformations of rifts from spring flood to low-water period and autumn freshets have been
considered. Such transformations have been shown to manifest themselves in the displacement of rift trough from the upper
to the lower point bars, accumulation of sediments in one phase of water regime and erosion of ridges in the other phase,
as well as in the advancement of ridge-type micro- and meso-forms of channel relief onto rift saddle. Differences have been
revealed between the regimes of rifts composed of sand and pebble-boulder sediments; specific features were identified in
the regime of rifts in rivers in permafrost zones and rifts with rock protrusions on the bed. 相似文献
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Sediment runoff,transporting capacity of flows and their role in river channel formation 总被引:1,自引:0,他引:1
R. S. Chalov 《Geography and Natural Resources》2011,32(3):220-225
An analysis is made of the sediment runoff as a determining factor of channel processes and as a set of phenomena arising
due to the flow-channel interaction. The amount of sediments transported by the flow is determined by its transporting capacity
that is changing constantly according to hydraulic characteristics of the flow undergoing changes across space and time. The
relationships between them are responsible for the directedness of vertical channel deformations, i.e. incisions and accumulations
of sediments leading to an increase or decrease in bottom elevations. In this case, the leading role in channel development
is played by the runoff of entrained sediments. Its proportion governs changes in morphometric characteristics of the channel
and its stability and influences the development of river branches and braids of the channel. 相似文献
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We characterize the main forms of manifestation of channel processes on first-order streams that have not been studied previously from this standpoint. The main morphological features of small streams are described, a typization of channel processes is provided, and differences from processes and forms of their manifestation in channels of larger rivers are identified. 相似文献