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1
Content available remote Phytoplankton characterisitcs for different types of Estonian rivers
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EN
The following phytoplankton characteristics and parameters were studied for different ecological types of river reaches: biomass (PB, mg l-1); abundance (PA, ×106 cells l-1); number of taxa per quantitative sample (PT); Nygaard's phytoplankton compound quotient (PCQ); phytoplankton dominants (PD). The quantitative characteristics of phytoplankton (species richness, abundance, biomass and PCQ) revealed an increasing trend from small to large upstream catchment areas, but did not respond to different river bedrock or flow velocity. Additionally, PCQ was the highest for the class of 'good' water quality. The phytoplankton dominants were not suitable for typology in the case of small streams where species composition was heterogeneous, without a welldeveloped phytoplankton community.
EN
The purpose of the study was to determine seasonal changes of ammonia nitrogen, nitrate nitrogen, total nitrogen, phosphate and total phosphorus in the years 2003–2009 in the river Supraśl. For this purpose a monitoring network was created with selected three control points on the basis of which the assessment was made. Control points were located near Gródek, Nowodworce and Dzikie. The research results were averaged for each month. On this basis the assessment of seasonal changes of nitrogen and phosphorus forms in the river Supraśl has been carried out. Research and analysis showed that the concentration of nitrogen and phosphorus in waters of Supraśl were characterized by a clear seasonal variation, the highest concentration of nitrogen was observed in January and February and the lowest in June in each of the analyzed points, the course of changes in the concentration of nitric and total nitrogen in March were different from the general course of reigning changes in their concentrations in surface waters.
EN
The River Świnka (Polesie Region, southeastern Poland) receives salty mine waters from the “Bogdanka“ SA coal mine. In April, July and October of 2005, investigations of benthic diatoms were conducted at four stations, two of which were located downstream of the entry point for canal mine waters, with the remaining two stations free from the influence of mine waters. Studies showed differentiation of diatom community species structure and relative abundance, as well as conductivity and Cl- concentrations at particular stations. Higher salinity (Cl- concentration reached 338.8 mg cm-3) and the appearance of saltwater diatom species (e.g. Navicula halophila, N. salinarum, Nitzschia commutata, N. constricta or Thalassiosira weissflogii) were observed in the part of the river influenced by mine waters.
PL
Porównano największe przepływy i odpływy jednostkowe rzek polskich z maksymalnymi wartościami rzek świata przedstawionymi w światowym katalogu wezbrań wydanym w 2003 r. pod auspicjami Międzynarodowej Organizacji Hydrologii Naukowej IAHS [6]. Określono górną obwiednię maksymalnych przepływów zaobserwowanych w Polsce w okresie 1921-2000 w zlewniach rzek różnej wielkości i porównano z analogicznie określoną górną granicą światowych wartości przepływów maksymalnych. Wartości tych przepływów w Polsce są wielokrotnie mniejsze niż największe przepływy zaobserwowane w rzekach świata o podobnej wielkości zlewni, zwłaszcza w krajach tropikalnych. Zwraca uwagę fakt, że żadna rzeka europejska nie znalazła się w zbiorze rzek, z których przepływy stanowią górną granicę światowych wartości.
EN
There have been compared the highest flow and unitary run-off values of Polish rivers with respective maximum values of rivers of the world presented in the world catalogue of freshets (rise waves) published in 2003 under the auspices of the International Association of Hydrologie Science (IAHS) [6]. There has been also determined the upper envelope of maximum flows which had been observed in Poland in the period 1921-2000 in river basins of various size and the result has been compared with analogically determined upper limit of world maximum flow values. The values of those flows in Poland are many times smaller than the highest flows observed in rivers in the world of similar in size catchment area, particularly in tropics. It is worthy of notice that the list of rivers the flows of which create the upper limit of world values does not contain any European river. M. Sakowicz: The energetistic utilization of the stage of fall Dębe.
EN
Groundwater resources play a dominant role in water supply in Serbia, and to manage them properly, an assessment of their quantitative and qualitative status must be given. The concept of quality groundwater management is the implementation of EU Water Framework Directive (WFD-2000/6/EC). In this, groundwater monitoring has the highest role, which should provide a comprehensive insight into the quantitative and qualitative characteristics of water in a particular area (Stevanović 2011). The research area in this case is karst landscapes of Serbia. The water bodies of karst groundwater have been identified in the Carpathian-Balkan Mountains of eastern Serbia and in the Dinaric area of western Serbia. Groundwaters of alluvial aquifers along the major rivers are systematically monitored, however, karst and artesian aquifers are not covered by the monitoring network. The current state of monitoring network in the karst of Serbia is, to say the least, unsatisfactory – only the spring of Mlava is observed by the Republic hydrometeorological service of Serbia. EU Water Framework Directive proposes water resource management at the level of river basins, so therefore, prior to network organization, the grouping of existing water bodies of karst groundwater was performed. The basic rule for grouping water bodies is that all bodies must belong to the same river basin and the groups provide reliable data for assessing the status of individual water bodies. Then topographical, geomorphological, hydrographic, geological and hydrogeological characteristics of the terrain were analyzed. According to Poledica (2015) and Stevanović (2015), 25 groups of water bodies in the areas of exploration have been singled out, 13 of them in western and 12 in eastern Serbia. For each group a representative monitoring network has been determined. 104 observation facilities have been selected in the domain of quantity and 53 facilities in the quality domain. This is the total number of observation points that are further sorted by priority. Including the economic factor, it is proposed to gradually develop monitoring networks. Beginning of observation will start in a period of 5 years from now, when observation facilities of first priority (springs of water supply) will be included. The observation facilities of second priority will be included in a period of 10 years from now and those of third priority will be included by 2035. Karst springs and purpose-built piezometers within the source where there are already wells for water supply provide the largest numbers of observation points. Also, hydrological stations are located on watercourses near karst springs where flows during the dry period of the year will be monitored. The final results are presented in the form of hydrogeological maps of Eastern and Western Serbia, which contain water bodies with observation points. These maps were made using the software package ArcGIS. On all facilities, it has been determined which parameters will continuously be monitored (content of observation) and how often (frequency of observation). The level of water will be observed continuously on the places where piezometers will be drilled. Discharge of springs will be observed each other day. Discharge regime of karst springs is studied enough only after many years of research. The reconstruction of monitoring network is suggested after six years. Microbiological and bacterial composition will be observed at least six times a year and other qualitative parameters at least four times a year. Spring discharges and level of groundwater belong to quantitative parameters. Dissolved oxygen, pH value, electrical conductivity, nitrates, turbidity and microbiological composition belong to qualitative parameters. It is very important to include all institutions that are the direct users of these resources, especially water supply system, industry and institutes for public health, and ensure the good cooperation and communication between them. studied enough only after many years of research. The reconstruction of monitoring network is suggested after six years. Microbiological and bacterial composition will be observed at least six times a year and other qualitative parameters at least four times a year. Spring discharges and level of groundwater belong to quantitative parameters. Dissolved oxygen, pH value, electrical conductivity, nitrates, turbidity and microbiological composition belong to qualitative parameters. It is very important to include all institutions that are the direct users of these resources, especially water supply system, industry and institutes for public health, and ensure the good cooperation and communication between them.
PL
Porównano zasoby wodne największych rzek państw europejskich. Rzekami najbardziej zasobnymi w wodę są Wołga, Dunaj, Ren, Rodan, a z mniejszych rzek-Pad, Sawa i Moza. Małymi zasobami wód rzecznych charakteryzują się rzeki Półwyspu Iberyjskiego -Tag i Ebro - oraz Tamiza w Wielkiej Brytanii, Prypeć na Białorusi i Marica w Bułgarii oraz Wisła nasza największa rzeka. Wykazano konieczność analiz porównawczych w opracowaniach danych hydrologicznych.
EN
There have been compared in the paper the water resources of the biggest European rivers. The most abundant in water are the rivers Wolga, Danube, Rhine and Rhone and among the smaller rivers -the Pad, the Sawa, the Moza. By small water resources are characterized the rivers of the Iberian Peninsula - the Tag and the Ebro - and also the Thames in Great Britain, the Prypec in Byelorussia, the Marica in Bulgaria and the Vistula-our biggest river. There has been shown the need for comparative analyses in elaborations of hydrologie data.
PL
Artykuł przedstawia interesującą propozycję Instytutu Inżynierii i Gospodarki Wodnej Politechniki Krakowskiej co do definicji, kryteriów i sposobu określania przepływu nieszkodliwego w rzekach poniżej obiektów piętrzących.
EN
The paper presents an interesting proposal by the Research Institute for Engineering and Water Management of the Technical University in Cracow concerning the definition, criteria and way of determination of the harmless flow in rivers below the dams.
9
Content available remote Hydropower Generation on The Nysa Klodzka River
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Adopted in 2009, the Directive of the European Parliament and of the Council on the promotion of the use of energy from renewable sources sets out the rules for how Poland is to achieve the 15% target of total primary energy from renewables by 2020. However, there are fears that the goals set out in this Directive may not be met. The share of Renewable Energy Sources (RES) in national energy consumption (150 TWh) is estimated at 8.6 TWh in 2009 and 12 TWh in 2011 (5.7 and 8% respectively). The level of RES in Poland until 2005 was approx. 7.2%. The analysis of RES technologies currently in use in Poland shows that in terms of the share in the total capacity, the 750 hydro-electric power plants which are currently in operation (with the overall capacity of almost 0.95 GW) are second only to wind power stations (2 GW). The authors have studied the Nysa Klodzka River in terms of possible locations for hydro-electric facilities. Eight locations have been identified where power plants might be constructed with installed capacities ranging from 319 to 1717 kW. The expected total annual electric power generation of these locations would stand at approx. 37.5 GWh.
EN
The purpose of the work was to determine the relationship between the state of the water environment quality of selected rivers (Zn, Cr, Pb, Cd and Cu tests in bottom sediments), and the sources of pollution resulting from the close proximity to the cities, through which they flow. The following rivers were selected for the study: the Biała river flowing through the city of Białystok, the Narew river flowing through the city of Tykocin and the village of Złotoria, the Supraśl river flowing through the village of Michałowo and Gródek as well as the Biała river flowing through the city of Bielsk Podlaski. The sediments were collected four times from the same points in 2016 in the period from July to October. The sediment samples were collected from the points located on rivers before and beyond towns and villages. The contents of the following metals were tested in the bottom sediment samples: Zn, Cr, Pb, Cd and Cu. The analyses were carried out applying the flame absorption spectrometry method. The statistical multivariate CA and FA analyzes were used. The highest contents of Zn, Pb and Cr were recorded in the bottom sediments from the following rivers: Biała (Białystok) and Biała inflow of Orlanka (Bielsk Podlaski), which resulted from the anthropogenic activity. The research also showed the impact of the agricultural activity due to the slightly elevated Cd level.
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The article concerns the self-purification of running waters in areas where they flow into water bodies. At such places, delta forms (alluvial fans, deltas) are created that are built up of the material accumulated by the watercourse. The study was conducted in the Upper Silesia region in southern Poland and concerned delta forms created in seven water bodies (Dzierżno Duże, Dzierżno Małe, Pogoria I, Pogoria III, Przeczyce, Kozłowa Góra, Pławniowice). The choice of the Upper Silesia region as the study area was dictated by the specific process whereby delta forms are created. In this region, which is among the most urbanised and industrialised in Poland, which results in most polluted surface waters. Running waters are heavily burdened with wastewater, by-products from processing minerals (particularly coal dust), technological water, sewage sludge, fertilisers, etc. The deposition of pollutants in river mouths leads to the rapid creation of delta forms with areas ranging from several hundred square metres to around 1 sq. km. The largest delta form has been created at the place where the Kłodnica River enters the Dzierżno Duże reservoir. During low water its area exceeds 1 sq. km and its thickness exceeds ten metres in some places. The overall volume of the Kłodnica River delta is estimated to be slightly over 2 million cu. m. Owing to the deposition that is taking place, running waters are subject to self-purification, particularly with respect to the solid particles they carry. This is a mechanical purification process. Apart from mineral substances, a significant amount of organic matter transported by the river is also deposited. The composition of delta sediments only partly reflects the characteristics of the substrate present in the catchments of the rivers that form the deltas in question, and the deposits often exhibit anthropogenic features. Delta sediments are a material that includes a large amount of organic matter, nutritional substances (mainly phosphorus compounds) and trace elements, including heavy metals. Concentrations of many elements exceed the levels characteristic of the natural geochemical background of sedimentary rocks. Therefore pollutants are immobilised, at least temporarily, during the process of creating the delta form, which protects the quality of the water in the water bodies. This purification effect is amplified by the vegetation overgrowing the deltas, which is dominated by common reed. This vegetation serves as a biological filter for waters that filter through it or remain stagnant, removing many pollutants by way of biological assimilation. Apart from their significance for water self-purification, deltas are important from the point of view of reducing the silting up of water bodies. Delta forms perform many functions in the natural environment as well. These include increasing the retention capacity of the surrounding area, shaping new habitats and increasing local biodiversity.
EN
Submersed plants appeared in the impounded section of the Warta River as a consequence of low discharge in summer and were colonized by epiphytic fauna dominated by Hydra sp., Simuliidae, and Chironomidae. The three-spined stickleback consumed it voraciously, and their diet composition closely reflected the available food resources. In May their alimentary tracts were filled with Cladocera drifting from the reservoir, and then by the dominant taxa associated with macrophytes, especially chironomid periphyton scrapers. A comparison of dipteran head capsule width in the food resources and in the alimentary tract proved the three-spined stickleback preference for the largest larvae (optimal foraging strategy).
EN
Creating the buffer zones is a function intended to designate an area in particular, of a constant distance around the spatial objects. The aim of the study was to create maps as thematic layers, which served to identify areas of existing and potential contamination of surface water and other environmental elements. Among others, it made possible to localize the areas potentially affected by the surface water pollution due to transport; localize the areas potentially affected by the surface water pollution due to the discharge of sewage from human settlements; localize the zones with mitigated impact of communication emissions due to the natural protection of forests taking the form of so-called geochemical barriers. The spatial analyzes allowed to generate model-zones of the existing and potential threat of water pollution in the Narew river catchment. Designated danger zones can be verified by studies as well as they can be very helpful in determining the monitoring network and for water quality modeling process.
PL
Przedstawiono część wyników doświadczenia łąkowego, prowadzonego w dolinie rzeki Supraśli. Omówiono zmiany poziomu wody gruntowej i uzyskane plony siana na tym terenie w nawiązaniu do suszy panującej w 2000 r.
EN
A part of results of the meadow experiment being carried on in the valley of the river Suprasl has been presented. With reference to the drought in the year 2000 there have been discussed changes in the level of the underground water and yield of hay obtained from that area.
PL
Badania prowadzono w trzech eutroficznych jeziorach położonych w północno-zachodniej Polsce: jeziorze Adamowo, Grażyna i Klasztorne. Z każdego stanowiska pobierano próbę zooplanktonu oraz próbę wody do określenia wybranych parametrów fizyko-chemicznych. W odniesieniu do uzyskanych wyników można uznać, że pomimo takiego samego statusu troficznego badane jeziora różniły się pod względem struktur jakościowych i ilościowych zooplanktonu, na co miały wpływ różne warunki środowiskowe badanych jezior. Podobieństwo jakościowe zooplanktonu pomiędzy jeziorami nie było zbyt wysokie. W najmniejszym jeziorze obserwowano największe liczebności zooplanktonu, szczególnie małych plankterów. Pozwala to wnioskować, że im mniejsza powierzchnia jeziora tym większa jest liczebność zasiedlającego je zooplanktonu. Biomasa zooplanktonu osiągała największe wartości w największym jeziorze Adamowo, co było spowodowane licznym występowaniem dojrzałych skorupiaków planktonowych. Biorąc pod uwagę zależność pomiędzy warunkami środowiskowymi jezior a zagęszczeniem zooplanktonu, stwierdzić można że największy wpływ na kształtowanie struktur zooplanktonu mają nieorganiczne związki biogenne.
EN
The aim of the study was to analyze the content of Ni in fractions of 1.0–0.2 mm, 0.2–0.1 mm, 0.1–0.063 mm, 0.063–0.02 mm, and <0.02 mm of river bottom sediments and plants (root, stem, leaf) of broadleaf cattail (Typha latifolia), yellow water lilies (Nuphar lutea), and cowbane (Cicuta virosa). Nickel content in bottom sediment was slightly higher than the geochemical background. The largest amounts of Ni were associated with the finest fraction, while the smallest with the thickest fraction. The highest content of this element was recorded at the point Ełk Barany, which was connected with developing industry in the city of Ełk. All of the tested plants showed greater Ni contents than the amount naturally occurring in plants. In most cases, most of Ni was associated with plant roots, and the least with leaves. It has been proven that aquatic plants can be good indicators of the aquatic environment status.
18
Content available remote An analysis of the mechanism of flow in ice-covered rivers
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EN
The paper presents a mechanism of flow of water in an ice-covered river in the case of movable bottom. The analysis is based upon the principal hydrodynamics equations of turbulent flow in the case of steady uniform motion. It leads to the conclusion of linear distribution of the turbulent shear stress with depth. It allows to obtain the vertical distribution of velocity of flowing water under the assumption that at the boundaries (movable bottom and ice) the viscosity of water is greater than the kinematics viscosity. The relations describing the vertical distribution of velocity of flowing water, as well as the eddy viscosity coefficient under these conditions, are given.
PL
Przedstawiono najważniejsze problemy związane z zagospodarowaniem, utrzymaniem i ochroną rzek istotnych dla rolnictwa. Wskazano kierunki działań wynikające z Ramowej Dyrektywy Wodnej.
EN
The most important problems connected with building, maintenance and protection of rivers vital to agriculture have been presented in the paper. There have been also pointed out directions for activities resulting from the Water Frame Directive.
EN
Pollution with heavy metals and waters in Mitrovica with surroundings, both in the past and in present days, is a preoccupation for the citizens of Mirtovica, as well as for the other inhabitants living around it. Such a problem has been a concern which still continues for a number of researchers who have been dealing with this issue, and who still continue to be preoccupied with the issue of heavy metal (habitat) pollution in this part of Kosovo. Heavy metal's contamination of the environment's main components, dates back to the 1970s/90s to this date. This pollution, especially of the rivers, is due to the industrial activity taking place in the Trepça Combine and the presence of industrial landfill sites of this Combine near the flow of two main rivers: the Sitnica and Ibër River waters, in the city of Mitrovica. The focus of our study, this time consists solely in the research and illumination of pollution with these heavy metals and waterworks of the Ibër River, as a result of the pollution caused by the industrial waste landfill located in Kelmend village. In the paper, we have attempted to show the concentration of heavy metals in sediment and water, by pointing at four sample sites of the Ibër river: in the Bosniak U1 neighborhood, then in the flow in front the U2 landfill, discharge flows from landfill U3 and a certain distance from the U4 landfill.
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