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  • Articles  (80)
  • 2015-2019  (80)
  • 2016  (80)
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  • Articles  (80)
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  • 2015-2019  (80)
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  • 1
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    Many-year variations of water pollution and the state of river ecosystems in different latitudinal zones in European Russia (2016)
    Springer
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    Publication Date: 2016-09-14
    Description: Many-year variations of water pollution and the state of more than two hundred of rivers (or their segments) in different latitudinal zones in European Russia are estimated. In accordance with latitudinal zonality, space and time trends in variations of water quality and the state of rivers are identified. By the level of water pollution, most river ecosystems (or their segments) were classified as polluted and very polluted , very polluted and dirty , dirty and very dirty . A tendency toward water quality improvement could be seen in the recent decade. More than 50% of the examined river ecosystems are at the transitional state of passing from natural (and/or equilibrium) to crisis state.
    Print ISSN: 0097-8078
    Electronic ISSN: 1608-344X
    Topics: Biology , Geography , Geosciences
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  • 2
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    Water quality assessment in reservoirs: Comparative analysis of bioindication systems based on macrobenthos characteristics (2016)
    Springer
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    Publication Date: 2016-09-14
    Description: Data on the Ruza and Mozhaisk reservoirs are used to analyze the applicability of different sampling methods and bioindication systems for rapid water quality assessment. The collected data were analyzed with the use of twelve biotic indices and their modifications. The mean water quality estimate in the coastal zones of both reservoirs varied from “moderate” to “good” and corresponded to α-mesosaprobic zone. The best performance in saprobity assessment was demonstrated by Pantle–Buck index modified by M.V. Chertoprud in the coastal zone and Balushkina index in soft soils in the central zones of the reservoirs. It is proposed to extend the number of indicator taxa in Pantle–Buck index modified by M.V. Chertoprud by incorporating taxa typical of soft soils, in particular, Chironomid larvae from Chironomus plumosus group. Recommendations are given for carrying out express-monitoring of the state of reservoirs.
    Print ISSN: 0097-8078
    Electronic ISSN: 1608-344X
    Topics: Biology , Geography , Geosciences
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  • 3
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    Many-year variations in river delta structures (2016)
    Springer
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    Publication Date: 2016-09-14
    Description: Data on several river deltas are used to analyze the regularities in their dynamics in the context of variations of water and sediment runoff, sea level, and hydroengineering activities in delta areas. The basis for this analysis includes the results of many-year studies of river deltas in Russia and the world. The specific features of the evolution of the structure and morphometry of bayhead deltas, forming in bays, lagoons, and estuaries are shown in the case of the Alikazgan delta in the Terek mouth area and the deltas of two watercourses in the Mississippi mouth area. Data on many-year variations of the morphometric characteristics of modern protruding deltas in open coastal zones are systematized, and the factors that have an effect on these changes are analyzed. The types of delta formation processes and the types of deltas are considered with regard to the factors involved. The majority of modern river deltas are found to slow down their progradation into seas under the effect of anthropogenic runoff decline; moreover, some deltas have started retreating and degrading.
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    Electronic ISSN: 1608-344X
    Topics: Biology , Geography , Geosciences
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  • 4
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    Water resources of the Northern Economic Region of Russia: The state and use (2016)
    Springer
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    Publication Date: 2016-09-14
    Description: The issues of water availability and water resources use in the Northern Economic Region are considered for the region as a whole and for the RF constituent entities it embraces.
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    Electronic ISSN: 1608-344X
    Topics: Biology , Geography , Geosciences
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  • 5
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    Hydrological simulation of river basins at different spatial scales: 2. test results (2016)
    Springer
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    Publication Date: 2016-09-14
    Description: The results of testing algorithms designed for generalizing the mathematical description of processes and averaging ECOMAG model parameters at scale aggregation during simulation in large river basins are illustrated by the case of simulation of soil moisture field dynamics, snow water equivalent, and runoff hydrographs in the Volga Basin. The calculated fields are compared with data collected by route snow measurements and measurements of available moisture in the monitoring network of agrohydrometeorological stations. The results of numerical experiments were used to study the effects of model grid scaling on the results of simulating the hydrological characteristics and to establish the minimal and maximal sizes of model cells for simulating runoff formation processes.
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    Electronic ISSN: 1608-344X
    Topics: Biology , Geography , Geosciences
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  • 6
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    Long-term variations of the trophic state index in the Narochanskie Lakes and its relation with the major hydroecological parameters (2016)
    Springer
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    Publication Date: 2016-09-14
    Description: Variations of the trophic status of lakes Batorino, Myastro, and Naroch were analyzed over a long period of 1978–2013. The lakes form a system of interconnected water bodies with a wide range of trophic states. In the period under consideration, the trophic conditions in the lakes varied from highly eutrophic (Lake Batorino) to oligotrophic (Lake Naroch), making it possible to analyze the long-term changes in the trophic state of the lakes with the use of different variants of evaluating the Carlson index (trophic state index, TSI), to assess the relationship between the three versions of the index with one another, with phytoplankton biomass, and with hydroecological characteristics, such as the concentrations of total N, seston, and organic matter and biochemical oxygen demand. The possibility to evaluate the index by other characteristics, including phytoplankton biomass, was also considered.
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    Electronic ISSN: 1608-344X
    Topics: Biology , Geography , Geosciences
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  • 7
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    Enhancement of water use efficiency at plants processing hydrocarbon materials (2016)
    Springer
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    Publication Date: 2016-09-14
    Description: A method is proposed for multicriteria performance assessment of water supply and disposal systems. Approaches are proposed for improving the utilization efficiency of water resources in plants processing hydrocarbon materials based on the potential of main-production technological processes and in-plant systems of heat and water supply, as well as industrial waste utilization. Engineering solutions are given for involving regenerated wastewater in the production cycle and reducing water consumption from external natural sources, and their system efficiency is evaluated.
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    Electronic ISSN: 1608-344X
    Topics: Biology , Geography , Geosciences
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  • 8
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    Physicochemical state and assessment of technogenic geochemical anomalies in bottom sediments of the Kyibyshev Reservoir near Ulyanovsk City (2016)
    Springer
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    Publication Date: 2016-09-14
    Description: The results of studying physicochemical properties of bottom sediments in the Kuibyshev Reservoir are given. The evaluated characteristics include their porosity, specific surface area and density, and chemical state characteristics (pH, oil products, organic matter, phenols, and the mobile and total forms of heavy metals). Technogenic geochemical anomalies of bottom sediments are evaluated. The obtained results characterize the environmental state of bottom sediments in the study area.
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    Electronic ISSN: 1608-344X
    Topics: Biology , Geography , Geosciences
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  • 9
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    Scenario prediction of changes in water balance components in the Lena Basin in the context of possible climate changes (2016)
    Springer
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    Publication Date: 2016-09-14
    Description: The dynamics of meteorological elements in the Lena R. Basin is predicted for the XXI century under four IPCC global scenarios of SRES family, corresponding to specified scenarios of the economic, technological, political, and demographic development of the civilization. The obtained predictions are used to simulate variants of possible changes in water balance components in the Lena Basin up to the mid-XXI century. The calculation procedure is based on the use of land-surface model SWAP and a climate scenario generator MAGICC/SCENGEN.
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    Electronic ISSN: 1608-344X
    Topics: Biology , Geography , Geosciences
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  • 10
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    Water isotopic-geochemical composition in the Trekhtsvetnoe meromictic lake on the White Sea coast (2016)
    Springer
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    Publication Date: 2016-09-14
    Description: The isotopic features of Lake Trekhtsvetnoe in the White Sea coast area were studied in 2012–2015 in both winter and summer. Lake Trekhtsvetnoe is a water body, separating from the sea, with constant vertical stratification throughout the observation period. Its isotopic, hydrophysical, and biological characteristics have been studied. By the isotopic profile of lake water body, three zones can be identified in the lake: (1) 0–1 m: mixolimnion zone with δ 18 O varying from–12 to–11.1‰; (2) 1.0–3.0 m: zone with transitional properties with δ 18 O varying from–11.1 to–5.5‰; (3) 3.0–7.6 m: monimolimnion zone with highest values of δ 18 O—from–5.5 to–4.7‰.
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    Electronic ISSN: 1608-344X
    Topics: Biology , Geography , Geosciences
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