An Erratum to this paper has been published: https://doi.org/10.1134/S0097807821120010

Abstract The study was carried out under the international Earth System Model–Snow Model Intercomparison Project on ten experimental well-instrumented snow sites in different parts of the Earth and aimed to examine the ability of the SWAP land surface model, developed by the authors, to reproduce the current characteristics of snow cover dynamics. A procedure was developed for scenario projecting of

Abstract The results of model calculations of the characteristics of anoxic zones in the Mozhaisk Reservoir over a 57-year period have been analyzed. A two-dimensional box hydrological model of the reservoir has been used to calculate variations of the values of ecological variables with a daily time step. The main regularities in the formation and development of anoxic conditions in different parts

Abstract Annaba gulf is a coastal area (southwestern Mediterranean Sea) that receives large diffuse inputs from Fertial plant, Seybouse wadi and Boujemaâ wadi, which are influenced by anthropogenic activities. Wastewaters and surface waters and sediments from these sites were analyzed for Polycyclic Aromatic Hydrocarbons (16 PAHs) by using gas chromatography system operating with the flame ionizing

Abstract Due to the saturation of natural waters with nitrogen compounds resulting from natural processes and anthropogenic activities, the problem arises of studying the ways of their migration, transformation in the hydrosphere and in aquatic biota. One of the ways of nitrogen transformation in the environment is the formation of nitrosamines—toxic organisms or biota that exhibit carcinogenic, mutagenic

Abstract The short lifetimes of multibranch delta systems are proved based on the theory of dynamic stability of delta branches and causes of its violation. Typical cases of such brevity and natural causes of the decay of some branches and the activation of others are considered. Examples of such processes in different deltas are given.

Abstract For the first time, the concentration of plastic particles in surface water of Lake Baikal was evaluated. The concentrations of plastic particles were evaluated in trawl samples taken in the coastal zone of the most densely populated southeastern coast and in the Maloe More―one of the most popular tourist zones in Baikal. Converted to water surface area, the concentration of plastic particles

Abstract A joint data repository on flowage lakes of the world and long-term flow variations in the rivers they regulate has been formed. The specific features of the flowage lake parameters have been analyzed along with their dependence on the characteristics of the lakes. A hypothesis has been proposed implying the global invariance of the coefficient of water exchange of lakes with respect to the

Abstract The objective of this study is to develop an anthropic exposure indicator for river basins using quantitative and qualitative aspects of the landscape and morphometric analysis based on fuzzy logic and geoprocessing. The indicator was developed from a Mamdani type fuzzy inference system by integrating information regarding the calculation of the anthropic transformation index and the circularity

Abstract New data on the contents of plant pigments and organic matter in bottom sediments of channel, floodplain and estuarine biotopes of the Gorky Reservoir (upstream Volga, Russia) are presented. Patterns of the distribution of sedimentary chlorophyll a and the products of its degradation, pheopigments, depending on the water current velocity, depth and type of the bottom sediments were revealed

Abstract Global reanalysis products are extensively used for hydrologic applications in sparse data regions. The establishment of some inputs for hydrologic modelling from global reanalysis requires prior scrutiny and assessment. Thus, the present study attempts to exploit Climate Forecast System Reanalysis datasets for the Mereb-Gash river basin in Eritrea, with the objective of preparing input data

Abstract The paper highlights results obtained from collation between river water quality in mountain regions of Russia and Armenia employing two different methodological approaches: a method of a complex assessment by hydrochemical parameters by a Specific Combinatorial Water Pollution Index (SCWPI) and the Canadian Water Quality Index (CWQI). Assessment was done of water quality of typical, identical

Abstract The effect of a large mining complex of Apatit JSC on the aquatic ecosystem of Lake Imandra is discussed. Hydrochemical data are given to characterize the pollution zone, and the distribution and accumulation of chemical elements between abiotic and biotic ecosystem components, including water, bottom sediments, seston, and fish, are described. It is proved that the polluted subarctic lake

Abstract The δ2H and δ18O values of the atmospheric precipitations in the Khibins vary within the range –147 ≤ δ2H ≤ –37‰, –20 ≤ δ18О ≤ –4‰ and are close to the global line of the precipitations for the northern hemisphere; the light values (with a positive deuterium excess) are typical of snow, while the heavy values are typical of rains. The data on the isotopic composition of water in open water

Abstract 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 resources development. The article is the first to analyze the distribution of the flow of water and suspended sediments between the major two branches of the forked channel of the Lower Ob, i.e., the Malaya Ob and

Abstract The study of oil entrainment mechanism is the basis of the vertical process modeling of spilled oil at sea. In order to reveal the effect of plunging breaking waves, a dripping water experiment on the oil film on static water was designed. It is found that with the increase of the dripping effect, the oil film will form a puddle, or a bubble, or droplets in the water. It can be deduced from

Abstract The changes in the ratio of species representing different morpho-functional groups, identified by physiological, morphological and ecological parameters [29] were analyzed based on the study on phytoplankton in different reaches of the Rybinsk Reservoir in 2000–2005. Water quality was assessed by the Q index of communities, developed taking into account the proportions of these groups. This

Abstract Dongying City is located in the northeast of Shandong Province and is the central city of the Yellow River Delta. It has abundant oil and gas resources, vast saline-alkali land area, and saline brine as the main groundwater. Therefore, freshwater resources are poor, as there is a contradiction in the water supply and its demand. Judging the trend of sustainable utilization of water resources

Abstract Long-term experimental data collected by the authors were analyzed to characterize the formation of spring surface flow in different natural zones of the Volga and Don basins with the use of water-balance method (hydrologic experimental plots) for its treatment, and literary data on such studies were generalized. The obtained unique material was used to characterize the surface runoff separately

Abstract Studies of water balance and variations of water regime of rivers in the Don Basin have shown a steady trend toward a decrease in spring flood volumes and an increase in runoff volume in winter since the mid-1980s. More frequent thaws have resulted in that snowmelt runoff formation can be seen almost throughout winter. A decrease in soil moisture content in the late October along with a decrease

Abstract The article considers the set of water management problems that has formed in the Don Basin in the context of current changes in the hydrological regime of rivers and an increase in the demand for the reliability of water resources available for economic sectors. Despite the decline in production and water consumption, the ecological conditions of water bodies in the basin have not improved

Abstract The article provides an overview devoted to wastewater treatment from nutrients and organic toxicants in Constructed Wetlands (CW). The analysis of the main microbiological processes of wastewater purification in these systems is made. It is shown that biological indicators and parameters of the plant, obtained by the molecular biological methods are the basis for the understanding and tracking

Abstract Water balance studies have been carried out in the territory of sand massifs in the Don River Basin. The studies were mostly focused on the water-regime plots in Kalachevsko-Golubinskie and Archedinsko-Donskie sands. The area under study was divided into zones according to sand types based on land relief, the conditions of the soil cover, vegetation, and phreatic-water mineralization and level

Abstract The deficiency of water resources in the Don River Basin is demonstrated along with the administrative division of the basin territory and the population of the Russian Federation as of January 1, 2018. The present-day state of the key participants of the water-management system is analyzed. Data are given to characterize the increase in the availability of central water supply to housing

Abstract Shouguang City is located in north-central of Shandong, distributing the piedmont plain and coastal plain from the south to north. This area, as a vegetable base in northern China, not only meets local needs but also has a large number of vegetables exported to domestic and foreign countries in the form of virtual water. The vegetable production in this area mainly depends on groundwater exploitation

Abstract Spatially high-resolution precipitation data is important for the users to study basin-scale hydro-logy and climate change. Inner Mongolia is a vast and sparsely populated region with sparse rainfall distribution. The Tropical Rainfall Measuring Mission (TRMM) satellites provide a remote-sensing data source covering the whole globe but is generally in coarse spatial resolution and cannot satisfy

Abstract Data on the maximal runoff of rivers in the Don Basin during spring flood are generalized, the cases of nonstationarity of time series are identified along with periods when such changes have taken place. The obtained results are used to evaluate the characteristics of maximal flow of spring flood under nonstationary conditions with the use of Bayesian approach. The results are given as a

Abstract Water quality data parameters consist of a large data set. Such a large amount of data incurs great effort in processing and conducting visualization techniques to facilitate the analysis and building of the necessary views for decision makers. The current study included a set of steps to data reduction for 34 parameters during two seasons, at different sites and depths for Mosul Dam Lake

Abstract Present-day changes in the landscape structure of the Don Basin are analyzed. Data of water-balance stations are used to determine the contributions of various land types to the formation of spring surface flow. Estimates are given for the present-day anthropogenic and climatic changes in the surface flow and infiltration into soil in plowed lands during spring flood, as well as river flow

Abstract The results of analysis of variations in the mean annual and minimal runoff in the autumn–winter and summer dry seasons in the Don Basin are discussed. The space and time regularities in the changes of the mean annual and mean minimal 30-day runoff have been studied, and the dates of disturbances in the heterogeneity of runoff observation series have been determined. The results of statistical

Abstract The industrial sewage pollution has become a public attention issues with the development of economy. The path analysis is employed to investigate the countermeasures of reducing Chemical Oxygen Demand (COD) and ammonia nitrogen (NH3–N) discharge. The result shows that urbanization rate (UR), industrial gross domestic product (IGDP), and environmental investment (EI) co-determine the COD discharge

Abstract The results of studies of floodplain landscapes of the Don tributaries in its middle reaches are presented. The rivers under consideration are the Khoper, Medveditsa, Ilovlya, and Chir, as well as the tributaries of the Khoper―the Kosarka and Buzuluk. At the preliminary office stage, hydrological data on water levels and spring flood discharges over 1988–2018 were analyzed, and the inundation

Abstract The results presented in the study characterize variations of river runoff in the Don Basin in the period of instrumental observations and under scenario conditions of global anthropogenic warming, which are likely in the early current century. Integral-difference curves are used to identify long-term phases of higher/lower annual and seasonal runoff of the Don and its major tributaries over

Abstract The materials of long-term observations at water balance stations in the Don basin confirm the existence of climate changes, which have led to changes in water runoff formation and other water balance elements. It is shown that the major changes in the hydrological regime of water bodies have been induced by the weakening of the effect of cryogenic regulation of water exchange in the basin

Abstract Himalayan rivers originating generally from >4000 masl, sustain large number of population downstream. However, these river basins are highly data scarce, and in situ data for hydro-meteorological parameters is available mainly from the regions below 2000 masl. Considering the high level of human dependence on these rivers, it is important to develop policies and plans based on the hydrology

AbstractAn Information–Modeling Complex has been developed for the information support of managerial decision making in the field of rational use, protection, and restoration of reservoir ecosystems. The system successively implements three mathematical hydroenvironmental models of the system Nizhnekamskoe Reservoir Drainage Basin―the Nizhnekamskoe Reservoir―the Kuibyshev Reservoir. The complex of

AbstractThe water quality parameters, like major ions, have been monitored at three stations located along the Syr Darya River. The trend analysis was performed on annual timescales using the Mann–Kendall test, the Sen’s slope estimator and the linear regression. The relationships of the water quality parameters to river discharge were also investigated. The statistical methods showed both positive

AbstractThis study explores the statistical relationship between spectral reflectance and hydraulic conductivity (K) of fluvial sediments in two Nebraska rivers. The spectral reflectance curves of sediments are obtained through hyperspectral instruments under controlled conditions. The K values are determined by three different methodologies, grain size analysis, an in-situ permeameter test, and a

AbstractDez River in Iran is a long river and has generally good-quality water. Unfortunately, in this river water quality has decreased over recent years due to drought, industrial and agricultural developments. Dez River plays a significant role in moderating the quality of Karun River After adjoining it. So, maintaining good water quality of Dez River is very important. In this case study, water

AbstractThe hydroecological simulation model GMV-MGU is applied to the Nizhnekamskoe Reservoir. The results of a series of diagnostic model calculations, which characterize the ecological state of the reservoir over 2012–2015, are discussed. The results of calculations are used to establish the major regularities in the space and time variations of water quality characteristics in the Nizhnekamskoe

AbstractSurface water quality could be interactively affected by the natural factor (seasonal variation) and human pollution source (industrial, agricultural, and residential sources). The current study was conducted in Hau Giang province in southwestern Vietnam (1) to investigate the interactive effect of natural factor and human pollution source and (2) to identify potential mechanisms related to

AbstractThe article gives the results of studies of the pollution level of soils, grounds, groundwater, water, and bottom sediments in water objects in Burnakovksyaya lowland in Nizhny Novgorod City as factors governing Volga water quality. The obtained data were used to reveal a polyelemental pollution of all environmental components in the study area with different levels, mostly caused by the past

AbstractThe article presents the results of summer dry-season areal surveys of subsoil water chemistry in the drainage basin of the Ivankovo Reservoir in the Volga segment from Tver City to Dubna City over period 1981–2019. The zone of subsoil water pollution by nutrients has shifted from the anthropogenic landscapes of agricultural fields to residential areas: horticultural and cottage settlements

AbstractThe objective of this study was to compare and assess the quality and study the hydrochemistry of groundwater in the Al-Baha and Al-Qassim areas, representing the Arabian Shield and Arabian Shelf, respectively, of the Arabian Peninsula. The chemical and microbiological constituents of the groundwaters of the two sites were acquired and compared. The Al-Baha analyses indicated that the underground

AbstractThe study is focused on examining and simulating the formation processes of the runoff and pollution export in the case of Rostov (Rostov Velikii), a town in the Volga basin. The diffuse runoff from Rostov territory and its spatial distribution were evaluated for the following components: ammonium, total iron, oil products, sulfates, chlorides, suspended matter, as well as COD and BOD5. The

AbstractRegularities in the formation of diffuse pollution of water bodies are discussed as their understanding is required for the development of an adequate water-protection strategy. The main scientific, methodological, and managerial problems of the regulation of diffuse pollution are related to the character of pollutant inputs into the environment and the complex character of the relationships

AbstractThe general concepts of the arrangement of water body monitoring are considered, which assume more effective use of the available data and observation systems and the implementation of additional studies and managerial activities aimed to take into account the formation factors of natural water quality under the effect of diffuse pollution sources.

AbstractA prototype of an expert system for decision-making support in optimizing measures aimed to protect pilot water objects from diffuse pollution in the Volga basin was developed based on special expedition studies carried out in 2018–2019, generalized results of earlier long-term studies, improved methodological approaches, and specially developed GIS. The prototype consists of fine interrelated

AbstractThe physically based ECOMAG-HM model, developed to simulate heavy metal cycles in large river basins, was used to study the spatial and temporal regularities in the formation of copper and zinc distributions in water bodies in the basin of the Nizhnekamskoe Reservoir. Maps of the mean annual concentrations of the metals in river network and the mean annual modules of diffuse runoff with its

AbstractThe role of diffuse pollution of water bodies in the formation of water quality in them is characterized. Some features of diffuse pollution, which are of importance for managing the process of their reduction, are identified. The main lines of the activity for managing the reduction of diffuse pollution are determined and characterized, including basin programming, regional planning, ecological

AbstractIn existing studies, external factors, such as hydrologic, hydraulic, and decision-making uncertainties, have been widely recognized as major risk source in reservoir flood routing. There are few researches focused on the intrinsic uncertainties which rooted in the reservoir flood routing modeling, for instance, the sensitivity of the water level to the initial condition in the passage of flood

AbstractEstimate is made for the possible reduction of nutrient export from the drainage basins of tributaries of the Kuibyshev Reservoir through the introduction of the best available technologies of agricultural production. The activity of more than eight hundreds of agricultural enterprises in the reservoir drainage basin was analyzed. Different types of underlying surface were classified with the

AbstractThe issues of formation and assessment of diffuse pollution of water objects in the zones near large mining and chemical industrial complexes are discussed. The study object is the Kama River (Kama Reservoir) in the zone of influence of the Solikamsk–Berezniki Industrial Hub. The major flows of pollution are due to seepage recharges from the operating and removed from service sludge storage

AbstractThe possible input of nutrients-pollutants into water bodies in the Upper Volga basin from agricultural lands is evaluated for the case of the Yakhroma R. with a basin area of 1437 km2. Water quality was studied along river profile to show that the sources of nutrient pollution, in addition to wastewaters from the cities of Dmitrov and Yakhroma, are agricultural lands on the water divide and

AbstractIn this study, hydrologic regimes of the Palas basin have been investigated with land use/land cover (LULC) change. To investigate the relationship between precipitation and surface runoff, a SWAT (Soil and Water Assessment Tool) model was developed and runoff response was analysed under different LULC conditions. Firstly, Post classification change detection technique was used to prepare time

AbstractA brief description is given for the natural conditions and economic activity on a local drainage basin of the Cheboksary Reservoir (less the Oka Basin). The main principles of a new version of landscape-hydrological method used to evaluate nutrient runoff from the drainage basin into water bodies are given. The article presents the values of the runoff of these elements into the Cheboksary

AbstractPresent work aims to insight the influence of bedform transport on velocity power spectra of acoustic Doppler Velocimeter (ADV) in order to address different spectral sub-regimes. Laboratory experiments were conducted over two types of rough bed (d50 = 4 mm): (a) immobile rough bed and (b) mobile bedform. The near-bed spectral characteristics during bedform transport are compared with those

AbstractA method for constructing two-dimensional distribution law in a symmetrical case for three-parameter Kritskii and Menkel distribution is considered, and some results of the application of the model in applied hydrological studies are discussed. A system of orthogonal functions with a weight function in the form of a three-parameter gamma distribution is proposed to obtain linear correlation

AbstractThe oxygen regime of the channel flow of the small Maima River (Upper Ob basin) has been considered. A study of the spatial and seasonal variations of oxygen regime characteristics in the mouth part of the river and its tributaries has shown that they vary from their sources to the mouths. The effect of the industrial–residential agglomeration of Gorno-Altaisk on surface water quality in the

AbstractIn China’s Pearl River Delta, numerous sinkholes caused by excessive groundwater pumping from a karst aquifer have opened. These sinkholes can cause wells and springs to dry up, dwellings to be damaged, and can facilitate the entry of pollutants into the aquifer. Controlling drawdown and pumpage to prevent sinkhole collapse is important for the aquifer’s protection and sustainability. This