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The Danube Delta dynamics formation and expansion represent the motivation of the study included in this paper. The results of soil studies made possible to develop the Danube Delta genesis maps [7]. That informationпїЅs are the input data and the validation data for the numerical flow studies of the Danube River. The study of the formation of new territories has been developed by the Computational Fluid Dynamics (C.F.D.) method. There were modelled in three dimensions the maps for Danube River Basin flowing into ...

This paper deals with the results coming from the research activity of the SECOSUD Phase II, called пїЅConservation and equitable use of biological diversity in the SADC region (Southern African Development Community) a project supported by the Italian Ministry of Foreign Affairs in the SADC [1]. In the framework of this project they have been investigated groundwater resources and shallow ones present in the buffer zone of National Limpopo Park, in the aim of better support water demand in the villages, rising in...

Our objectives were to investigate the bacteriological, biological and chemical status for sediment quality in a zone from Danube catchment according to Water Framework Directive. The area chosen for investigation is a large section of the Danube River on the section Bazias-Calarasi and its main tributaries located in the southern part of Romania (Jiu, Olt and Arges rivers) and the aquatic systems type пїЅdeltaпїЅ in the south-east of the Danube. All investigations performed where made in accordance with Directive...

The sedimentological sequences along the lower sections of rivers have been created by the alluviation of meandering rivers in historical times. For the rehabilitation measures (focusing on water replenishment to oxbows) with the purpose of enhancing ecosystem services, the detailed hydrogeological study of alluvial deposits and soils is indispensible. Our investigation covers the area lying between the CпїЅn-Szaporca oxbow lake system, under rehabilitation, and the Drava River, which controls groundwater flow. Th...

The trace element composition of endorheic saline lakes (with total dissolved solids varies from 1 to 590 g/L) of the Altai Region (Russia) is of undoubted interest from the point of view of their mineral resources. Among the trace elements in lake waters, high content of boron (up to 78 mg/L), bromine (up to 820 mg/L), lithium (up to 3.6 mg/L), strontium (up to 13 mg/L), iodine (up to 6.3 mg/L), and arsenic (up to 0.6 mg/L) have been determined. The content of uranium in the investigated lakes varies over a wide ...

As numerous studies show, changes in the environment at the end of the 20th century have become global ones. This means that the buffer capacity of the Earth, and the planetary boundaries have been subjected to a massive impact of the different human activities for several decades. Achievement of the Sustainable Development Goals, adopted by the UN, is becoming more difficult to fulfill. Chemical pollution directly or indirectly affects the quality of natural resources, including water. Providing the population wi...

River bed processes include the flow and entrainment, transport and deposition of sediment particles on the river bed. The morphology of alluvial river channels is determinate by complex interaction between of constituent physical processes: flow, sediment transport and river bed deformation. Under natural conditions, rivers tend to achieve a relatively stable combination between different variables that characterize them: liquid flow, solid flow, hydraulic slope of river, sedimentological characteristics of the r...

The activity of drainage during various seasons and the impact of meteorological conditions on drainage runoff in different seasons (winter, spring, summer and autumn) during the period of 1969-2009 are reviewed. Particularly important indicator of drainage activity пїЅ dynamics of water runoff. The present article analyzes the change of climatic conditions in the object, Central Lithuania, following the data of Kaunas Meteorological Station; and it is determined that during the period of 1969-2009 the lowest quan...

Study case is situated in Caras Severin County. Every sediment transport model application is different both in terms of time and space scale, study objectives, required accuracy, allocated resources, background of the study team etc. For sediment transport modelling, it is necessary to know the characteristics of the sediment in the river bed. Therefore it is recommended to collect a number of bed sediment grap samples. These samples should be analyzed in terms of grain size distribution.To solve theoretical prob...

The temperature of some surface and ground waters in Romania was measured during the 2015-2017 time interval at high temporal resolution in order to identify the main thermal properties and their oscillation. The water monitoring in B?ile Felix area was undertaken at Fp3 water well and Ochiul Mare Lake. The measuring sites in Geoagiu-B?i area are represented by water pumped from F3 water well and a thermal spring in Cibului Gorge. The outflowing groundwater from 2 water wells was measured in HпїЅr?ova area. In ord...

Genesis, transport and accumulation of settled sediments of mountain rivers are such random processes in time and space, which are defined by the river flow rate (Q m3/s?c), height of the basin (IпїЅ), the inclination of the river and basin geology. Genesis and the volume of river sediment is the function of the climate and, in accordance with its cycles, it increases during the warming period and decreases as the temperature falls. The main natural factors for sediment formation are the glacier, erosion, landslid...

Numerous past studies proved the potential of fluorescence spectroscopy to characterize aquatic organic matter and its link to function and chemical water quality. It was proposed as an optimum monitoring method due to its advantages, such as: rapid measurements, high sensitivity and selectivity, requires small quantities of sample with little or no sample preparation. Although fluorescence spectroscopy was used on different types of water systems, no complex study was undertaken to compare the fluorescence signal...

The paper discusses a comprehensive assessment of the ecological state of the basin of the transboundary Selenga River. This assessment was created on the basis of an analysis of the factors of direct and indirect effects on water bodies. The indicators used were grouped according to the types of anthropogenic influences - demographic, industrial and agricultural. The aggregate anthropogenic load was defined as the arithmetic average value of the points of demographic, industrial and agricultural loads. The result...

The Danube, the second largest river in Europe, after its flow through many cities and countries, meets the Black Sea creating a meeting point which benefited the creation of the Danube Delta known as one of the greatest wetlands of the planet. The stretches of water and land of this delta offer good living conditions for many species of plants and animals. GIS technology is an important tool in the analysis of geographic areas. The purpose of this study was to create maps using a set of GIS technologies that pres...

This study focuses on the analysis of the impact of land use changes on the flood regime in the Myjava River basin located in the Western Slovakia. The Myjava River basin has an area of 641.32 km2 and is typical for the formation of fast runoff processes, intensive soil erosion and muddy floods. The main factors responsible for the problems with flooding and soil erosion are location, geology, pedology, agricultural land use and cropping practices. A GIS-based spatially distributed WetSpa rainfall-runoff model was...

The generation and occurrence of surface runoff from a slope is driven by many factors, such as the slope gradient, the physical properties and current state of the soil, the type and density of the vegetation cover, and the intensity and duration of rainfall events. Within the study experiments with a rainfall simulator were focused on an analysis of the impact of a changing slope gradient on the generation of surface runoff and the amount of eroded soil material. The experiments were conducted in laboratory cond...

Within the global hydrological cycle, by redistributing the water masses, there are variations of the gravitational field as a result of changing the subsurface density and the atmospheric masses. For the use of gravimetric data in the hydro-geological modeling it is necessary to correct the direct and indirect effect of gravity due to the altitudes at each point on the topographic surface. Also, based on the variation of the gravitational field according to the selected time intervals (monthly, seasonal, yearly),...

The concept of sustainable development has an increasing influence on the implementation of innovative solutions processes. On the other hand, technologies are an important factor driving development, not only economic but also social and ecological. The aim of the article is to present the importance of the creative process during implementation of geothermal water deironing technology for sustainable development. There are many water deironing technologies available on the market. However, only a few of them are...

The purpose of this study was to identify the factors of influence in alluvial deposits due to the anchoring of barges in the vicinity of river ports. The problem of analysis was identified at the anchorage of the barges near the Galati Mineral Harbor on the Danube River. The area of the navigable channel located downstream of the mineral port is affected by alluvial deposits. Major problems occur in the summer months, when Danube waters are very low. Analysis of these issues was done with the SolidWorks Flow modu...

The main purpose of this work was to determine the influence of type of sampling container on a chemical composition changes of geothermal water. Current research conducted on a bottled waters indicated that, from the vessel walls to water stored in a bottle are transferred various pollutants, mainly the elements such as: arsenic, chromium and antimony [1-3]. Waters with a natural high temperature can intensify mentioned process. The experiment was conducted on the samples of geothermal water collected from the PG...

For a long time, coal mining in the Eastern Donbass was the most powerful factor affecting the natural environment. The most significant were the natural underground and surface waters. Their pollution was due to mixing with highly mineralized man-made mine waters, which seeped through the rock mass, polluting the underground hydrosphere, and at the same time, as a result of pumping out of mines, fell into rivers. As a result of the closure of most coal mines in the region in the 1990s, the processes of hydrospher...

The need to improve the quality of water in the metropolitan area Galati-Braila is the direct result of RomaniaпїЅs engagement to comply with the European legislation regarding the continuous monitoring of water quality through the permanent control of the bacterial and physical-chemical parameters, not only in the water destined for human consumption, but also in the water drained in the rivers of the region. The water needed for the urban area Galati-Braila comes from the Danube, and in this geographical segment...

Mining and chemical industry is a source of significant anthropogenic impact on natural components. Industrial wastes of Rozdil state mining and chemical enterprise (SMCE) пїЅSirkaпїЅ are one of the sources of environmental pollution, including soils and the water environment. The enterprise is located in the West of Ukraine (Lviv region). It poses an environmental hazard to the Dniester River and surrounding settlements. Large-tonnage wastes like phosphogypsum (over 3 million tons) were formed on its territory in...

In recent years the small hydrographical basins were affected by numerous extreme hydrological events. Genesis of floods from these hydrographical basins is linked primarily by climatic conditions and other factors such as: geology, soil by its temperature and its humidity, vegetation, topography trough slopes, shape and surface of the hydrographical basin, which influence the concentration time and water volume. Mike She model is able to simulate the entire stream flow. This paper is using Mike She Model for runo...

An important feature of the small rivers in the fact that they are the starting point of the river network, and any changes that occur in their mode, will marked on the hydrological chain. Small rivers form the water resources of medium and large rivers, hydrochemical water quality and creating lands large areas. Object is a small river Mertvovod in Mykolaiv region (Ukraine). Purpose is an environmental analysis of the state of the Mertvovod River, to determine and analyze possible impacts on the state of the wate...

Since the beginning of widespread use of plastic its consumption and production has been constantly increasing. As a result of human activity part of waste ends up in our environment and is deposited in each of the elements of the biosphere. These impurities can be in the form of large elements, small particles fragmented to macroscopic level (pellets, facial scrub grains) and the microparticles visible under a microscope. Particularly harmful for the environment are microplastic particles, which can be deposited ...

The periods with precipitations surplus represent a risk that usually has a local prevalence, unlike the periods with precipitations deficit, where the areal spread is large, and the onset and evolution are slow. The perception in the case of periods with pluviometric surplus is that of a major hydrological risk, because of the violent and progressive way of manifestation, while droughts are perceived as being less dangerous phenomena. Among the pluviometric parameters that visibly influence the precipitations reg...

The river monitoring activity from the territory of the Banat hydrographic space which is situated in south-western part of Romania started in the 19th century, when the achievement of drainage works were started, of great amplitude, in the subsidence area of the Western Field, where there several swamps and frequent floods took place, and when several hydrotechnical works were performed, based on studies and projects, for which several observations and hydrological measurement where necessary. The occurrence of t...

The chemical composition was assessed and the trends of spatial and temporal variability of river water quality in the Tuzlov and Seversky Donets basins which are main waterways of the Eastern Donbas (the west of the Rostov region, Russian Federation) were identified. River waters have a neutral or slightly alkaline reaction, are saturated with oxygen, and are characterized by high sulfate content and high mineralization (up to 6.8 g /dm3). Based on the results of the comprehensive assessment, the water quality of...

Fractal geometry in recent years became an useful tool used in many scientific fields. One of the directions of development of that tool was also an attempt as using it for describing the morphology and granulometry of solid phase contained in various suspensions. The solid phase can come from different sources, such as municipal process (e.g. water treatment) or industrial process (e.g. metallurgy/steel industry or mineral processing). Suspensions on which one can come across in industry tend to be grainy and the...

The use of magnetic susceptibility data in order to determine the lithology of river and lakes deposits has become an efficient and rapid method of analyzing sedimentary material. This paper aims to achieve both a more accurate determination of sediment lithology based on the study of the magnetic susceptibility of the cores extracted from the bottom of the rivers, as well as the rate of deposition. The sediment lithology and the deposition rate represent the most important information for the characterization of ...

An increasing frequency and magnitude of flash floods motivates water managers and other authorities to focus on enhancing flood protection of small headwater watersheds, which are especially vulnerable to this type of flooding. One of the ways how to achieve this goal is to increase the volume of existing small water reservoirs (SWR) dedicated to store flood wave. This paper investigates the possibilities of utilizing a SWR Vrbovce (west of Slovakia), which is currently being used for water supply and fishery, in...

The paper presents a proposal for validation of a numerical model of a sedimentation process with use of a flow system. The essence of the proposed solution is to verify the numerical model using quantitative data, expressed by the flow rate and concentration of the suspension at the input and output of the device, as well as the qualitative data describing their granulometric composition. The analysis was carried out using a laboratory settler, as a sedimentation device, in which, during the purification process ...

The upper part of the Tatarstan Republic section is complexed by sedimentary of multi facies complexes of Middle Upper Permian, Mesozoic and Pliocene-Quaternary rocks. The surface and ground water are characterized by a wide variability in composition, mineralization, water hardness and other parameters. These variations are determined by a complex of natural and technogenic factors. The most important natural factor is interaction of the atmospheric precipitation and their derivates with soils and rocks of the se...

The article represents the results of a multi-year (1995-2011) monitoring of wind waves in the northwestern part of the Black Sea. The author gives a clear-cut presentation of the regime and extreme characteristics of wind waves of the northwestern shelf of the Black Sea. The measurements were carried out on a stationary offshore platform Golitsino-4, located 50 km from the shore. A twisted resistive wave gage with a sampling resolution of 4 Hz and the possibility of registering wave heights up to 10 m was used to...