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In the present paper, we present a part of the results of the questionnaire survey, which took place in the municipalities of 93 municipalities in the Presov region. The questionnaire contained 27 questions which, in addition to formal information on the municipality are focused on the occurrence and periodicity of floods, the time axis of the floods, the current state of preparedness of municipalities for floods, as well as the improvement/ worsening of the situation in the case of applied flood protection measur...

Qanats (or karez) are ancient, sub-horizontal, underground water tunnels that have served over centuries as main water-supply systems in arid and semi-arid regions, in particular the Middle East and North Africa. In today?s fragile contexts, water scarcity plays an important role in these regions. Quantitative hydrogeological analyses, such as groundwater maps, are needed for water management plans and sustainable development. As part of a knowledge exchange program and with the participation of young Afghan refug...

The development of a model for estimating and predicting the dynamics of plankton in a lake-type reservoir, depending on the meteorological and hydrophysical parameters, is carried out in the Nizhny Novgorod State University of Architecture and Civil Engineering in 2014-2018. Model for quantitative description of biomass production depending on solar radiation and temperature was developed. The influence of water stratification on algae blooming was investigated on the basis of systematic procedures for the quanti...

This study investigates content of radioactive gas radon ? Rn-222 in a number of sources of surface waters of different type (spring, artesian, well, river etc.), located in the territory of Kartli artesian basin, Georgia. Water samples were selected from 23 sources. Researches were carried out in the period January-December; samples from several locations were selected monthly. Electronic radon detector RAD7 was used for radon content determination. It was established, that radon content ranged depending on the s...

Radon is dissolved in ground water and can be transported from the source with water into the buildings. Subsequently indoors, when water is exposed to air, radon is released. Showers and sprays are a prime release method and the greater the water usage, the greater potential radon problem may occur. Outdoors, radon is quickly diluted to very low, not problematic concentrations but indoors, it can concentrate significantly. Although radon in indoor air is indicated as the second leading cause of lung cancer, not e...

Changes of environmental situation such as pollution of the atmosphere, surface water and ground water quality deterioration require measures to reduce the harmful effects of human activities on the environment. As such, the problem is the inability of some treatment facilities to provide a quality of treatment that meets the requirements of modern environmental standards. This leads to a decrease in water quality and eutrophication of water bodies. The goal of this article is choice of biochemical treatment metho...

In the present work, UV-Fenton, UV-H2O2 and Fenton processes were employed to treat a leachate from the municipal solid waste landfill of Astana (Kazakhstan). Each experiment lasted 120 minutes, and the treatment efficiency was assessed through total organic carbon (TOC), total nitrogen (TN) and color removal. The total volume of the treated solution was 250 mL and an annular UV (254 nm) photoreactor operated in batch recycle mode was used in the case of photochemical treatment. The landfill leachate, which curren...

The effects of global warming are becoming more and more felt by changing climatic conditions across the entire surface of the earth. Thus, in some regions of the Earth's surface, catastrophic floods have begun to occur more and more often due to the increase in both the occurrence frequency and the intensity of torrential rains. In order to reduce the flood damage, it is necessary to prepare hazard maps and flood risk maps. These maps are prepared using hydraulic simulation of the flood propagation on the waterco...

Raft-assembling unit composed of four small volume bundles (up to 5 cubic meters) linked by the means of the fastening logs and flexible couplings has been proposed for the shallow rivers. As the results of experimental researches the mathematical model of hydrodynamics resistance was obtained. The timber transport units (TTU) were formed from 1?6 raft sections. The study was performed at 1:20 model-prototype relationship. The ?length/beam? ratio of the TTU varied from 1 to 6. Modeling during uniform motion of the...

Fractal geometry in recent years became a 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. While monofractals are used primarily to describe the space occupied, multifractals can be used to describe entire sets of data. (The set of data could be: various data series, distributions of physical quantities (such as, for example, particle size dist...

In connection with the production and distribution of drinking water it is necessary to take into consideration the possibility of an emergency, which in this concept means undesirable effects of forces and phenomena endangering human health, property, goods, and, last but not least, also the environment. These are natural hazards and anthropogenic hazards or their combination. It is therefore necessary to eliminate at least partially these hazards and minimize their adverse effects. To eliminate hazards, a risk a...

Physical-chemical and microbiological parameters of waters of rivers are determined seasonally in the waters of small and big rivers of Adjara Black Sea coastline (Georgia). The object of research was the following rivers flowing to The Black Sea: Chorokhi and Acharistskali (length-438 and 95 km), from small rivers?Kubastskali, Bartskhana, Korolistskali, Chakvistskali and Kintrishi (length<75 km). The strong smell was found on the Kubastskali river (5 points) and the Bartskhana (4 points) river. Their color was ye...

This study evaluates the seasonal habitats preference of selected macrozoobenthos (Ephemeroptera, Trichoptera and Plecoptera) in the Ostravice River. The Ostravice River is located in the Moravian-Silesian Region, the Czech Republic. For macrozooentos sampling in 2016 and 2018, a standard 3-minute semiquantitative multihabitat sampling method including a manual benthos net sampler was used. Macrozoobentos was collected from the surface of upper side of the stones, underside of the stones, side of the stones of 20-...

Golden Horn is one of the most attractive and historical place in Istanbul because sea river interaction, and different ancient cultural and spiritual heritage. According to environmental perspective sediment deposition (or erosion) at river mouth always crucial for coastal zones. Quality and quantity of the sediment and determination of the deposition and erosion places in the coastal places are an important issue for this subject. In the presented study, sediment samples were supplied from river mouths towards t...

Underground exploitation of mineral resources is often carried out in a watered rock mass. Dewatering of rock layers disturbs its geomechanical equilibrium, consequently resulting in deformations occurrence on the terrain surface. Furthermore, modeling of rock strata dewatering and related land subsidence is still a complex issue, mostly due to unambiguous qualitative and quantitative characteristics of rock mass. Presented research aimed at determination of dynamics of hydrogeological changes and land subsidence ...

The stable isotopes oxygen-18 (18O) and deuterium (2H) are naturally abundant in precipitation. Due to fractionation effects, a seasonally variable distribution of water isotopes occurs in the precipitation of temperate and continental regions. Water isotopes, being conservative tracers, are ideal for investigating subsurface flow processes. They reveal information about soil water fluxes like evaporation, transpiration, downward infiltration and others that are difficult to determine by other techniques. We are u...

The article represents the results of a multi-year (1995-2011) monitoring of wind waves and wind parameters in the northwestern part of the Black Sea. The author gives a clear-cut presentation of the regime and extreme characteristics of wind waves and wind speed 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 ...

Brief The JOINTISZA Project (Strengthening cooperation between river basin management planning and flood risk prevention to enhance the stats of waters of the Tisza River Basin) creates transnational cooperation for next two years in the largest sub-basin of the Danube Basin. The project is funded through the Interreg VB Program of the European Union, the Danube Transnational Program (DTP 2014-2020) component, Priority Axis 2 (Responsibility for Environment and Culture in the Danube Region), Component 2.1 (Strengt...

The low head hydropower development ?Capra VI and VII? consists of two small hydropower (SHP) stations accomplished in sequence on the homonym stream in Arge? County, center Romania, each of them less than 1MW. The SHPs, study case for this paper, follow the European directives regarding the water, the environment and the green energy. Their accomplishment was based on the existing delimitation of the minor river bed for which it was noticed that the ichthyofaunal environmental conditions are not entirely achieved...

The low head hydropower development ?Capra VI and VII? consists of two small hydropower (SHP) stations accomplished in sequence on the homonym stream in Arge? County, center Romania, each of them less than 1MW. The SHPs, study case for this paper, follow the European directives regarding the water, the environment and the green energy. Their accomplishment was based on the existing delimitation of the minor river bed for which it was noticed that the ichthyofaunal environmental conditions are not entirely achieved...

The paper presents a study on the ecological recovery of a waste from the urban waste water treatment plant, respectively the sewage sludge. The use of sewage sludge, is made through its use in agriculture and forestry, through incineration with energy recovery, or co-incineration. According to EU legislation, sludge cannot be used in farming in raw form, so it must be treated before it is properly used. The paper presents an analysis of sludge samples from the decanters of the urban waste water treatment plant fr...

The main objective of this paper was to assess the water quality in Siret, in the Galati area. Galati is a port town on the Danube River in south-eastern of Romania. For the purpose of carrying out these studies, water samples from ten Siret sites were taken. Water quality has been monitored between November 2016 and December 2017. Physical and chemical characteristics of water were performed. The PFP7 Flam Photometer was used for potassium and calcium ions determination. An UV-VIS Specord 210 Spectrophotometer wa...

Considering the increasing generalized pollution and tightening of environmental protection regulations, it is necessary to constantly optimize the treatment technologies, in order to meet the quality standards when discharging wastewater into surface water. The paper presents a study on a wastewater treatment plant in Romania that serves a municipality with a population of approximately 400,000 inhabitants, having a sewerage network working in a unitary system. The main indicators of the waste water quality (flow...

Considering the widespread pollution and the need for taking drastic measures to protect the environment, it is necessary to constantly optimize the treatment stages within the wastewater treatment plants in order to meet the quality standards when discharging wastewater into surface water. The paper presents a study on a wastewater treatment plant in Romania that serves a municipality with a population of approximately 400,000 inhabitants, having a sewerage network working in a unitary system. The study followed ...

The main aim of this paper is to investigate possibility of use evapotranspiration (ET) data derived from the Surface Energy Balance Algorithm for Land (SEBAL) based on Earth Observation (EO) and local meteorological station (Eddy Covariance -EC - flux tower) data to improve simulation of Soil and Water Assessment Tool (SWAT) for catchment with significant area of wetland, case study of the Upper-Biebrza catchment (North-East Poland). The Upper-Biebrza SWAT model was set for 1951-2016 in which potential evapotrans...

The application of reactive materials in the form of a Deep Permeable Reactive Barrier during and after coal conversion constitutes an innovative concept of protecting the environment from georeactor influence. The reactive materials filling the post-process cavern will make it possible to remove or immobilise the gaseous and liquid contaminants that may be subject to leaching, while also reinforcing rock mass stability. The article pays particular attention to the technical and legal possibilities for reactive ma...

Underground waters in St. Petersburg are strategic reserve of drinking water. Dense urban development, motor transport and industrial enterprises directly affect the quality of groundwater. In addition, groundwater can also carry pollutants into the Gulf of Finland. The main purpose of this article was to assess the state of groundwater in the coastal part of St. Petersburg. The study was based on the processing of laboratory analyzes primary results of water samples collected in the framework of state monitoring ...

It is very useful to use technologies of various fields. An important position in the field of knowledge engineering and knowledge technologies is the so-called decision support systems. The paper gives an overview of this highly exploited field of modern information technology applications, provides basic information on such systems, their architecture, the possibilities of their application, and some typical uses in the field of water management. Questions concerning effects and contradictions of multipurpose wa...

The aim of the study was to present of phosphorus and nitrogen migration direction in the flow - through lakes system by mathematical relationships. Mathematical models included the water flow at the inlet and outlet of the lakes, the residence time of lake, the phosphorus and nitrogen concentration in the water and bottom sediment, the size of nutrient release from bottom sediments. The models of P and N retention for lakes of upper Pas??ka indicate that the retention of nutrients in flow - through lakes is prima...

Due to the occurrence of unfavorable phenomena of droughts and water scarcity in Poland, actions aimed to preserve and improve the state of water resources, such as the realization of small water retention, are considered valued. Small water retention contributes to the mitigation of the effects of water resources defficiency and fulfills a variety of functions influencing natural environment, farming and forestry. The paper aims to determine the level of implementation of small water retention programmes in Polan...

Biological wastewater treatment is part of biotechnology and represents a method by which dissolved organic impurities and colloid suspensions in wastewater are transformed by microorganisms in inoffensive degradation products (carbon dioxide, water, other products) and in new cell mass (biomass). All the biological processes are influenced by temperature, because micro-organisms activity and oxygen solubility depends on it and on pressure, too. The optimal temperature for biological treatment is between 10 and 30...

In many industrial processes, it is necessary to separate the solid phase from water or an aqueous solution. Gravitational methods are often used for this purpose (beneficial energetically), e.g. a sedimentation process. However, due to the low efficiency of the classical sedimentation process, it is necessary to intensify this process, e.g. by means of a coagulation process or flocculation process. The effectiveness of the coagulation process depends on a number of factors: dose and type of coagulant, type and co...

Urban areas focusing on nature protection are facing many problems. The basic problem of urbanized areas is the management of rainwater. The concentration of pollutants is most problematic in rainwater. After the impact of rainfall on surfaces occurs immediate contamination of surface contamination. This pollution is then necessary to clean or somehow arrange prevent their infiltration in groundwater or river network. Such contaminants include heavy metals, for example. In our research, we focus on the analysis of...

The use of the remote sensing in order to monitor the morphological parameters of littoral beaches must generate the support data and information for management of concrete environmental assessment in different situations, including evolution of the hydrodynamic models?extensions for the adjacent areas of maritime or fluvial ports. The result of rapid Geo-referencing, encompassed in the spatial data processing providesthe support for an adequate spatial analysis of the high resolution coastal/marine imagery. The r...

Hydrogeologists are interested in borders that separate the groundwater recharge, transit, discharge (RTD) areas. Unfortunately, no good method exists for finding them. In the course of using the hydrogeological model (HM) of Latvia (LAMO) scientists of Riga Technical University have developed the new method that generalizes the RTD concept and gives locations of the borders. LAMO is run by the commercial program Groundwater Vistas (GV). The GV program provides the velocities vz for the vertical and vx, vy for the...

Water can be found everywhere and plays an important role in human life and equilibrium of the environment. The agriculture, industry and urbanization have had and have a special impact on the biodiversity and water necessity. To establish the line at which a pressure is considered significant, meaning if due to this pressure the surface water do not reach ?good status? it will be made an analysis of pressure and impact on the recommendation of the Water Framework Directive and national methodologies, but taking i...

The mouth areas of the seas are the most interesting and complex objects for studying the distribution of pollutant flows and the factors of their formation. Different approaches can be used to identify pollutant flows and the role of the geochemical barriers, in particular the analysis of the distribution of marker compounds that most clearly reflect the pollution levels themselves and possible sources of their entry into the components of the aquatic systems. Polycyclic aromatic hydrocarbons (PAHs) are considere...

The research object was the D?ugie Lake in Olsztyn (north-eastern Poland) (area 26.8 ha, maximum depth 17.3 m). It is a stratified, bradimictic urban lake - a depth index of 0.3 indicates a deep recess of the lake's bowl in the ground. In the past, the lake was almost completely degraded as a result of the discharge of raw domestic sewage. After applying two methods of restoration (artificial aeration with destratification and the phosphorus inactivation), the quality of lake water was improved. The data of multia...

The article analyzes the thermal and humidity conditions of the ?arnowska Peatland, which is part of a larger complex of raised bogs located in the coastal zone of the Baltic Sea in Poland. The research was carried out on the basis of long-term changes in air temperature, atmospheric precipitation and field evaporation (1951-2015) from the synoptic station in ?eba. The mentioned indicators were used to determine their impact on the formation of seasonal variability of groundwater level on the peat bog. The climati...

Health and working efficiency of river and marine craft crews depend largely on the quality of drinking water. In this respect, autonomous water treatment systems for ships are of extreme importance, which should be efficient, reliable, and safe providing required quality of drinking water by all chemical and microbiological indicators. The article analyzes existing methods of cleaning, disinfecting and conditioning drinking water for ships. Methods of maintaining drinking water quality during prolonged storage in...

Contribution of water use, other types of economic activities and natural features to the water pollution is still unclear. Previous researches outlines also that anthropogenic factors affecting water quality in urban areas differ from those in rural areas. The purpose of this study is to identify effects on freshwater resources from urban water use in the Yamal-Nenets Autonomous District as a part of Russian Arctic. The study is based on regional and federal reports on the sanitary-epidemiological situation and e...

The fast development and densification of urban areas, combined with climate change conditions, have a consistent impact on urban water management services such as rainwater handling. The current pattern of urban development focuses on the creation and expansion of grey infrastructure, resulting in the deterioration of the natural environment and the loss of ecosystem functionality. This research aimed to identify and mix technical (hydraulic) solutions with green- infrastructure and with town-planning measures in...

In the hydrological area of Banat from Romania, 20 bodies of underground water were identified and delimited, out of which 5 are cross-border underground water bodies. The present paper characterizes the underground water bodies in the B?rzava catchment area, which has an area of 1202 km2, with an average altitude of 289 m. The B?rzava catchment area occupies the central part of the Banat catchment area, bordering the north and east with the Timi? catchment area, to the south with the Nera catchment area and to th...

The possibilities to develop health resorts and balneological or spa and thalassotherapy centres in the Baltic Sea region countries have not yet been fully analysed. The water resources in Latvia have been used historically and still in nowadays could be used for different types of treatments more effective. The core questions for a medical tourism development are products, demand and service quality. It is marked in the Baltic Sea country (Lithuania, Latvia, Estonia) development strategy that environmental manage...

Through this study and researches carried out in this paper, it was attempted to highlight the need for the re-equipment of the treatment station in a town with 6000 inhabitants due to the high exploitation costs, the lack of a constant discharge that satisfies the local water requirements and the quality of the drinking water currently distributed fully meet the applicable drinking law. This article presents also the exploitation optimization (from the energy point of view) of a drinking water treatment plant, ba...

Hydrobiological monitoring of selected pools (alluvial oxbow) was carried in the K?ran?-Hrb??kovy t?n? Nature Reserve (Czech Republic) between 2015 and 2017. The pools represent a residual aquatic ecosystems of original inundation floodplain of the Elbe River, before river stream regulation. The regular samplings were performed every four weeks and more than one-year cycle was covered. Water quality parameters (temperature, conductivity, pH, dissolved oxygen and transparency were measured in the field. The level o...