scholarly journals The Zeya Reservoir Salt Composition

2015 ◽  
pp. 32
Author(s):  
Keyword(s):  
Uniform Distribution ◽  
Maximum Concentration ◽  
Major Ions ◽  
High Water ◽  
Water Area ◽  
Salt Composition ◽  
Reservoir Filling

Formation of the Zeya Reservoir waters salt composition over many years is considered. Maximum concentration of major ions and mineralization were observed in the bottom layers of water during the reservoir filling, the lowest values and the lack of differences in depth were observed in high-water 1988. A uniform distribution of the major ions concentration in the water area of the reservoir in the present conditions and very low mineralization (<26 mg/dm3) are presented.

scholarly journals Salt composition of the waters of the Bureya reservoir

2021 ◽  
Author(s):  
Keyword(s):  
Water Samples ◽  
Major Ions ◽  
Water Area ◽  
Chloride Ions ◽  
Oxygen Deficit ◽  
Spatial And Temporal Variability ◽  
Amur Basin ◽  
Salt Composition ◽  
Reservoir Water ◽  
Hydrogen Carbonates

Significance. Significance of the work lies in the need to study the salt composition of the Bureya reservoir water from the beginning of filling, which is important for predicting the water quality of reservoirs in the Amur basin that are to be designed. The objective is to evaluate content of main ions in the water of the Bureya reservoir, and to identify factors determining their spatial and temporal variability. Methods. Hydro/chemical observations in the Bureya reservoir were made from 2003 to 2008 at five plots covering the major part of the water area. Water samples were taken from the surface, middle, and near-bottom horizons in winter, summer, and fall. Water samples were taken from the surface in January, July 2019 in the landslide area and in July 2020 at eight sites in the water body between the landslide and the hydropower dam. Analytical work was carried out according to the methods accepted in hydrochemistry. Materials of the Amur Basin Water Administration for 2005-2019 were used in the work. Results. The content of the main ions in the water of the reservoir during the filling period and the following years was assessed. The dominance of calcium ion among cations and hydrocarbonate ion among anions in the salt composition of water was shown. It is established that the emergence of oxygen deficit in water due to the increased area of flooded forests and reduced water inflow caused the absence of sulfate ion in the reservoir water in autumn and winter 2005. It is shown that staged filling of the reservoir contributed to gradual smoothing of differences in the content of major ions and stabilization of the salt composition of water in the sixth year of filling. In current conditions the content of sodium and potassium ions and chloride ions in the water area of the reservoir is relatively evenly distributed, the highest values of concentrations of calcium and magnesium hydrogen carbonates are observed near the mouth of the Tyrma River. The effect of a large landslide on the content of major ions in the water in 2019-2020 is considered.

DISTRIBUTION OF DISSOLVED CHEMICAL ELEMENTS IN THE YENISEI RIVER ESTUARY AND ADJACENT WATER AREA OF THE KARA SEA

2017 ◽  
Author(s):  
Alla Savenko ◽  
Alla Savenko ◽  
Oleg Pokrovsky ◽  
Oleg Pokrovsky ◽  
Irina Streletskaya ◽  
...  
Keyword(s):  
Trace Elements ◽  
River Runoff ◽  
Major Ions ◽  
Chemical Elements ◽  
River Estuary ◽  
Water Area ◽  
Kara Sea ◽  
Yenisei River ◽  
Adjacent Water ◽  
The Yenisei River

The distribution of dissolved chemical elements (major ions, nutrients, and trace elements) in the Yenisei River estuary and adjacent water area in 2009 and 2010 are presented. These results were compared to the data obtained during previous hydrochemical studies of this region. The transport of major cations (Na, K, Mg, Ca) and some trace elements (Rb, Cs, Sr, B, F, As, Mo, U) in the estuary follows conservative mixing. Alkalinity also belongs to conservative components, however this parameter exhibits substantial spatial heterogeneity caused by complex hydrological structure of the Yenisei Bay and adjoining part of the Kara Sea formed under the influence of several sources of desalination and salty waters inflow. Concentrations of Pmin, Si, and V in the desalinized waters of photic layer decrease seaward owing to uptake by phytoplankton. The losses of these elements reach 30–57, 30, and 9% of their supply by river runoff, respectively. The content of dissolved phosphates and vanadium in the intermediate and near-bottom layers of the Yenisei River estuary strongly increases with salinity due to regeneration of precipitated organic matter, whereas silica remineralization is much less pronounced. Barium is characterized by additional input of dissolved forms in the mixing zone in the quantity comparable to that carried out by river runoff. This may be caused by its desorption from river suspended matter due to ion exchange. The transport of dissolved Al and Mn in the estuarine zone is probably controlled by the coagulation and flocculation of organic and organomineral colloids, which is indicated by a decrease in the concentration of these elements at the beginning of the estuary (31 and 56%, respectively) followed by a stable concentration further seaward.

HYDROGEOLOGICAL CHARACTERISTICS OF RESERVOIR WATERS OF THE CASPIAN SEA DEPOSITS

2021 ◽  
Vol 82 (3) ◽  
pp. 33-48
Author(s):  
NABIEVA VICTORIA V. ◽  
◽  
SEREBRYAKOV ANDREY O. ◽  
SEREBRYAKOV OLEG I. ◽  
◽  
...  
Keyword(s):  
Oil Recovery ◽  
Caspian Sea ◽  
Oil And Gas ◽  
Chemical Properties ◽  
Water Area ◽  
Water Soluble ◽  
Salt Composition ◽  
The Caspian Sea ◽  
Recovery Coefficient ◽  
Hydrogeological Characteristics

Hydrogeological conditions of reservoir waters of oil and gas fields in the northern water area of the Caspian Sea characterize the geological features of the structure of the Northern Caspian shelf, as well as the thermodynamic parameters of the exploitation of productive deposits, production and transportation of oil and gas. Reservoir waters contain water-soluble gases. According to the size of mineralization, the ratio of the main components of the salt composition, as well as the presence of iodine and bromine, reservoir waters can be attributed to a relatively "young" genetic age, subject to secondary geochemical processes of changing the salt composition in interaction with "secondary" migrated hydrocarbons. The physical and chemical properties of reservoir waters are determined by PVT analysis technologies. Hydrogeological and geochemical studies of compatibility with reservoir waters of marine waters injected to maintain reservoir pressures (PPD) during the development of offshore fields in order to increase the oil recovery coefficient (KIN) indicate the absence of colmating secondary sedimentation in mixtures of natural and man-made waters.

scholarly journals Contemporary Morphometry of the Kama Reservoir

2010 ◽  
Author(s):  
Keyword(s):  
Water Area ◽  
Morphometric Parameters ◽  
Digital Model ◽  
Reservoir Water ◽  
Riparian Area ◽  
Geological Conditions ◽  
Reservoir Filling

Results of the Kama Reservoir water area hydrographic studies with the aim to specify its morphometric parameters have been given; its reaches, hydrographic areas and sites’ morphometric indicators changes dynamics has been analyzed in comparison with the 1970 data; the hydrological/morphological zoning scheme has been updated, a digital model of the Kama Reservoir bottom and banks relief has been derived; changes of the riparian area engineering/geological conditions upon the reservoir filling up to the forced level marks have been assessed; “The Kama Reservoir Morphometry” GIS project has been developed.

Research of Cracking Resistance of Thermal Insulation Coatings for Aerated Concrete

2019 ◽  
Vol 974 ◽  
pp. 458-463 ◽  
Author(s):  
Valentina Loganina ◽  
M.V. Frolov
Keyword(s):  
Moisture Content ◽  
Crack Resistance ◽  
Tensile Properties ◽  
Uniform Distribution ◽  
Thermal Insulation ◽  
Water Demand ◽  
High Water ◽  
Expanded Perlite ◽  
Expanded Vermiculite ◽  
Aerated Concrete

The high water demand of finishing compositions obtained using expanded perlite and vermiculite sand reduces the crack resistance of the resulting thermal insulation coatings. The use of microspheres as fillers should make it possible to increase the crack resistance of the resulting coatings. The crack resistance of lime heat-insulating coatings for the finishing of aerated concrete obtained using ash microspheres of aluminosilicate and expanded vermiculite sand has been determined. It is established, that coatings obtained using aluminosilicate ash microspheres, are characterized by good crack resistance due to low shrinkage deformations, high ultimate tensile properties and uniform distribution of moisture content in the process of moistening.

DISTRIBUTION OF DISSOLVED CHEMICAL ELEMENTS IN THE YENISEI RIVER ESTUARY AND ADJACENT WATER AREA OF THE KARA SEA

2017 ◽  
Author(s):  
Alla Savenko ◽  
Alla Savenko ◽  
Oleg Pokrovsky ◽  
Oleg Pokrovsky ◽  
Irina Streletskaya ◽  
...  
Keyword(s):  
Trace Elements ◽  
River Runoff ◽  
Major Ions ◽  
Chemical Elements ◽  
River Estuary ◽  
Water Area ◽  
Kara Sea ◽  
Yenisei River ◽  
Adjacent Water ◽  
The Yenisei River

The distribution of dissolved chemical elements (major ions, nutrients, and trace elements) in the Yenisei River estuary and adjacent water area in 2009 and 2010 are presented. These results were compared to the data obtained during previous hydrochemical studies of this region. The transport of major cations (Na, K, Mg, Ca) and some trace elements (Rb, Cs, Sr, B, F, As, Mo, U) in the estuary follows conservative mixing. Alkalinity also belongs to conservative components, however this parameter exhibits substantial spatial heterogeneity caused by complex hydrological structure of the Yenisei Bay and adjoining part of the Kara Sea formed under the influence of several sources of desalination and salty waters inflow. Concentrations of Pmin, Si, and V in the desalinized waters of photic layer decrease seaward owing to uptake by phytoplankton. The losses of these elements reach 30–57, 30, and 9% of their supply by river runoff, respectively. The content of dissolved phosphates and vanadium in the intermediate and near-bottom layers of the Yenisei River estuary strongly increases with salinity due to regeneration of precipitated organic matter, whereas silica remineralization is much less pronounced. Barium is characterized by additional input of dissolved forms in the mixing zone in the quantity comparable to that carried out by river runoff. This may be caused by its desorption from river suspended matter due to ion exchange. The transport of dissolved Al and Mn in the estuarine zone is probably controlled by the coagulation and flocculation of organic and organomineral colloids, which is indicated by a decrease in the concentration of these elements at the beginning of the estuary (31 and 56%, respectively) followed by a stable concentration further seaward.

scholarly journals Low cost, multiscale and multi-sensor application for flooded area mapping

2018 ◽  
Vol 18 (5) ◽  
pp. 1493-1516 ◽  
Author(s):  
Daniele Giordan ◽  
Davide Notti ◽  
Alfredo Villa ◽  
Francesco Zucca ◽  
Fabiana Calò ◽  
...  
Keyword(s):  
High Resolution ◽  
Low Cost ◽  
Digital Terrain Model ◽  
High Water ◽  
Water Area ◽  
Essential Elements ◽  
Terrain Model ◽  
Basin Scale ◽  
High Resolution Images ◽  
Flooded Area

Abstract. Flood mapping and estimation of the maximum water depth are essential elements for the first damage evaluation, civil protection intervention planning and detection of areas where remediation is needed. In this work, we present and discuss a methodology for mapping and quantifying flood severity over floodplains. The proposed methodology considers a multiscale and multi-sensor approach using free or low-cost data and sensors. We applied this method to the November 2016 Piedmont (northwestern Italy) flood. We first mapped the flooded areas at the basin scale using free satellite data from low- to medium-high-resolution from both the SAR (Sentinel-1, COSMO-Skymed) and multispectral sensors (MODIS, Sentinel-2). Using very- and ultra-high-resolution images from the low-cost aerial platform and remotely piloted aerial system, we refined the flooded zone and detected the most damaged sector. The presented method considers both urbanised and non-urbanised areas. Nadiral images have several limitations, in particular in urbanised areas, where the use of terrestrial images solved this limitation. Very- and ultra-high-resolution images were processed with structure from motion (SfM) for the realisation of 3-D models. These data, combined with an available digital terrain model, allowed us to obtain maps of the flooded area, maximum high water area and damaged infrastructures.

scholarly journals The Influence of Urban Landscape Geosystem on Salt Composition of River Waters

2018 ◽  
Keyword(s):  
Urban Landscape ◽  
Steppe Zone ◽  
High Water ◽  
Environmental Standards ◽  
Salt Composition ◽  
River Waters ◽  
Total Growth ◽  
Three Rivers ◽  
The City ◽  
Hydrological Regimes

This study of the change in salt composition of the water in Ukrainian rivers has shown that the salts ratio and the total dissolved solids ratio increase in the waters of rivers flowing in the steppe zone of Ukraine. Purpose. To study the salt composition of waters in the rivers making up an integral part of the urban landscape geosystem. Methods. Potentiometric and gravimetric methods as well as titration and computation. Results The results were obtained on the basis of analyzing 42 surface water samples taken under various hydrological regimes of the three rivers flowing in the city of Kharkiv. The total growth of chlorides towards the end of the Kharkiv River seasonal floods made up 158.31%, during the autumn high water it was 105.26%, and at the start of seasonal floods it was 37.14%. In the waters of the Lopan River, the total growth of chlorides towards the end of seasonal floods made up 86.67%, during the autumn high water it was 56.69%, and at the start of seasonal floods it was 72.22%. The total growth of chlorides towards the end of the Udy River seasonal floods made up 42.05%, during the autumn high water it was only 0.89%, and at the start of seasonal floods it was 12.5%. Towards the end of the Kharkiv River seasonal floods the amount of sulphates decreased by 7.46% while during the autumn high water it was almost unchanged (increased by 0.27%); the amount of sulphates decreased by 1.13% towards the end of the Lopan River seasonal floods and by 10.03% during the autumn high water; the amount of sulphates increased by 55.95% towards the end of the Udy River seasonal floods (on the territory of Kharkiv city) while during the autumn high water it increased by 31.43%. Conclusions. It was established that chlorides concentration in the water under various hydrological regimes is extremely changeable with the tendency to increase, yet their content does not exceed environmental standards.

scholarly journals Contemporary Morphometry of the Votkinsk Reservoir

2011 ◽  
pp. 23-32
Author(s):  
Keyword(s):  
Water Area ◽  
Morphometric Parameters ◽  
Digital Model ◽  
Reservoir Water ◽  
Riparian Area ◽  
Geological Conditions ◽  
Reservoir Filling

Results of the Votkinsk Reservoir water area hydrographic studies with the aim to specify its morphometric parameters have been given; its reaches, hydrographic areas and sites’ morphometric indicators changes dynamics has been analyzed in comparison with the 1970 data; the hydrological/morphological zoning scheme has been updated, a digital model of the Votkinsk Reservoir bottom and banks relief has been derived; changes of the riparian area engineering/geological conditions upon the reservoir filling up to the forced level marks have been assessed; “The Votkinsk Reservoir Morphometry” GIS project has been developed.

scholarly journals MODERN STATUS OF THE MICROECOSYSTEMS OF THE NORTHERN CASPIAN

2018 ◽  
pp. 30-38
Author(s):  
Svetlana Aleksandrovna Dyakova ◽  
Ecatherina Rafaelevna Galyautdinova ◽  
Elena Glebovna Lardygina
Keyword(s):  
Water Quality ◽  
Antimicrobial Agents ◽  
Vegetation Period ◽  
High Water ◽  
Water Area ◽  
Multi Drug Resistance ◽  
The Caspian Sea ◽  
Volga River ◽  
The North ◽  
Pathogenic Factors

The article highlights the data on the abundance of saprotrophic bacterioplankton and bacteriobenthos in the water area of the Northern Caspian in the period from 2013 to 2017. There has been described the influence of the Volga river runoff during the spring flood on bacterioplankton and bacteriobenthos in the northern part of the Caspian Sea. The number of saprotrophic bacterioplankton in the spring period depended on water content; the minimum of saprotrophs was recorded in 2015 (low water year), maximum - in 2016 (high water year). Studying the vertical distribution of saprotrophs number showed that near the bottom it was somewhat less than on the surface. The most favorable sanitary situation in the Northern Caspian was registered in 2015 (throughout the year, water quality was estimated as clean), unfavorable periods occurred in 2013 and 2016 (during nearly whole vegetation period water quality was estimated as contaminated). In the bottom sediments seasonal changes of saprophytes completely corresponded to bacterioplankton, the abundance of bacteriobenthos exceeding the parameters of bacterioplankton. There has been studied species composition of saprophyte bacteriocenoses of the North Caspian, determined the dynamics of yearly occurrence of different groups and families of microorganisms. In the period from 2013 to 2016 there was observed a decline in the number of species of microorganisms, in 2017, species diversity increased slightly. In summer months and at the beginning of autumn species maximum was observed, in spring and late autumn there was registered species minimum. Most of isolated bacteria belonged to a group of opportunistic pathogens, while true saprophytes were much less common. Among the isolated species there have been determined potentially pathogenic microorganisms, their pathogenic activity and antibiotic resistance have been studied. The presence of one or more pathogenic factors, together with multi-drug resistance of bacteria to antimicrobial agents proved the potential danger of these representatives of bacterioplankton and bacteriobenthos for hydrobionts and humans.

Sign in / Sign up

Export Citation Format

Share Document