Wyniki wyszukiwania - Biblioteka Nauki

1

The oxygen budget of two closed, dimictic lakes in the vicinity of Bytów (West Pomeranian Lake District, northern Poland)

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Witek Z. , Jarosiewicz A.

Oceanological and Hydrobiological Studies

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2010

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tom Vol. 39, No.2

135-145

EN

The aim of this work was to identify key factors governing the oxygen fluxes in two thermally stratified lakes of different morphology. Oxygen and temperature profiles in lakes Jeleń and Mały Borek, as well as phytoplankton primary production in Mały Borek (oxygen-method) were measured in monthly intervals, except for periods of ice cover. Rates of oxygen release due to photosynthesis, consumption in the water column, loss to atmosphere, depletion in the hypolimnion, and restoration during periods of turn-over were roughly estimated. It was discovered that trophic conditions and morphometry may substantially influence not only the intensity, but also the timing, of particular events in the oxygen cycle of the lakes.

2

Issues in the protection of small river valleys: the example of the Kulawa River valley (northwest Poland)

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Prajs B. , Antkowiak W.

Oceanological and Hydrobiological Studies

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2010

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tom Vol. 39, No.3

129-136

EN

This paper presents the results of research relating to the vegetation of the Kulawa River valley and its flow lakes - Głuche Duże, Głuche Małe, and Sieczonek. Transformations observed in the flora examined were the result of two overlapping factors: 1. anthropogenic factors - among others, a high phosphorus content in the waters of the river and in nutrients accumulating in the lakes; 2. natural factors, such as a reduced level of subsoil waters. In the protection of river valleys, it is important to diagnose all threats. The diagnosis should be based not only on an evaluation of water quality, but also on the state of the whole environment of the valley.

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Development of tools for ecological quality assessment in polish marine areas according to the Water Framework Directive. Part III - Secchi depth

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Łysiak-Pastuszak E. , Krzymiński W. , Lewandowski Ł.

Oceanological and Hydrobiological Studies

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2009

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tom Vol. 38, No.3

113-124

EN

The implementation of the EU Water Framework Directive (WFD) requires ecological status quantification on the basis of biological and physico-chemical parameters, and an assessment of reference conditions and relevant environmental pressures for the construction of response curves. In this study the linking of water transparency, a proposed eutrophication indicator, to environmental pressure parameters was examined in the Polish sector of the Baltic Sea. Statistically significant linear correlations were detected between nutrient concentrations in sea water and Secchi depth, and between nutrient riverine loads and Secchi depth. The magnitude of acceptable deviation from reference conditions is also discussed.

4

Phytoplankton as eutrophication indicator in the Gulf of Gdańsk water

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Niemkiewicz E. , Wrzołek L.

Oceanological Studies

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1998

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tom Vol. 27, No. 4

77-92

EN

The present survey presents the results of phytoplankton number and biomass measurements and also chlorophyll a contents in marine water. The investigations were started in autumn1994 and continued in summer 1995 along six coastal profiles in the Gulf of Gdańsk. The paper provides the current condition of the phytoplankton - the first link in the food chain in a water body biocenosis. The research confirmed also the early 80s findings as to the changed structure of phytoplankton domination where flagellates dominated in terms of number and dinoflagellates - in terms of biomass.

5

The Effect of Treated Sewage Outflow From a Modernized Sewage Treatment Plant on Water Quality of the Breń River

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Kowalik T. , Bogdał A. , Borek Ł. , Kogut A.

Journal of Ecological Engineering

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2015

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tom Vol. 16, nr 4

96--102

EN

The paper aimed at determining the effect of treated sewage discharged from a sewage treatment plant, modernized in 2007–2008, on the quality of the receiving water – the Breń river. The mechanical-biological sewage treatment plant is situated in the northern part of Dąbrowa Tarnowska town (Malopolskie voivodship). The treated sewage is disposed of by means of a collecting pipe to the Breń river, which abiotically is a lowland sandy stream, type 17. The hydrochemical analyses were conducted monthly, from May 2014 to April 2015 in three measurement points. The first and the third were situated on the Breń river, 30 m above and 400 m below the treated sewage outlet respectively, whereas the second one was on the outflow collecting pipe from the sewage treatment plant. In the analysed water, 17 physicochemical water quality indices were determined by means of reference methods. On the basis of the data analysis it was found that pollutant concentrations in the treated sewage discharged into the Bren river did not exceed the values stated in the water permit and only sporadically did not meet the requirements stated in the Regulation of the Minister of Environment regarding ammonium nitrogen concentrations in the winter-spring period. Slight dynamics of seasonal changes of physicochemical indices values in the treated sewage evidences a high proficiency of the sewage treatment plant operation, irrespective of the air or water temperature. The treated sewage affected the increase in 12 from among 17 analysed physicochemical indices in the Breń river, of which the dependencies were statistically significant in 8 cases. BOD5 and ammonium nitrate caused a change of water quality class from I to II, and in case of phosphates a decline of ecological state from very good to below good. Despite a negative effect of the sewage treatment plant, the water quality state in the Breń river would be much worse if untreated municipal waste flowed into the receiving water.

6

Trophic State of Small Retention Reservoirs In Podlasie Voivodeship

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Szczykowska J. , Siemieniuk A. , Wiater J.

Journal of Ecological Engineering

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2017

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tom Vol. 18, nr 5

160--167

EN

The study was carried out using water samples from two small retention reservoirs located in the communes: Czarna Białostocka and Turośń Kościelna in Podlaskie Voivodeship. The main tasks of both reservoirs are to improve the water balance by means of regulating the levels and water outflow. Three characteristic measurement and control points were selected on both reservoirs in accordance to the water flow in the longitudinal section. The first and third points were located near the inflow and outflow of water, while the second in the middle of the reservoirs. Samples of water for the study were collected from the surface layer of the shore zone of the reservoirs once a month from March 2015 to February 2017 (water from two hydrological years was analyzed). Water samples were subject to determination of total phosphorus, total nitrogen, and chlorophyll “a” concentrations, as well as turbidity. Contamination of the water reservoirs with biogenic compounds is a common problem and at the same time difficult to eliminate due to the scattered nature of external sources of pollution, especially in the case of agricultural catchments, as well as the inflow of untreated sewage from areas directly adjacent to the reservoirs. Based on achieved results, high values of TSI (TN), TSI (TP), TSI (Chl), and overall TSI, clearly indicate the progressive degradation of water quality in analyzed reservoirs. Appearing water blooms due to the mass development of phytoplankton adversely affect the quality of water in the reservoirs and biochemical processes occurring both in water and bottom sediments, are conditioned by progressive eutrophication.

7

Charophytes in the estuarine Curonian Lagoon: Have the changes in diversity, abundance and distribution occurred since the late 1940s?

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Sinkevičienė Z. , Bučas M. , Ilginė R. , Vaičiūtė D. , Kataržytė M. , Petkuvienė J.

Oceanological and Hydrobiological Studies

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2017

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tom Vol. 46, No. 2

186--198

EN

The results of the recent (2014-2015) inventory and three historical datasets (1949-1959, 1960-1980 and 1997-2007) were analyzed in order to track the long-term changes of charophytes in the largest estuarine lagoon of the Baltic Sea. The present species composition of charophytes in the estuarine part of the Curonian Lagoon consisted of 7 species, including tolerant to salinity (Chara aspera, C. contraria, C. globularis and Nitellopsis obtusa) and typical brackish-water species (Chara baltica, C. canescens and Tolypella nidifica). The highest congruence of species was between the 1997-2007 and 2014-2015 datasets, which covered respectively eutrophication and post-eutrophication periods. The 1949-1959 dataset (closest to the reference conditions) differed by the absence of typical brackish-water species. The 1960-1980 dataset (the major period of eutrophication) was relatively poor in study sites and species. During the last 6 decades, only tolerant to salinity freshwater species were constant and abundant; only Nitella mucronata can be considered as extinct. Recently, C. contraria became dominant and widespread. The changes in the charophyte species composition, abundance and distribution can be explained by different intensity of surveys and/or density of study sites, but also by the increased exposure to brackish waters since 1980s and/or recently reduced effect of eutrophication.

8

Chironomidae (Diptera) community response to improved oxygen conditions in a naturally recovering lake (Łękuk Wielki, northeast Poland)

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Koszałka J.

Oceanological and Hydrobiological Studies

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2009

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tom Vol. 38, No.2

83-89

EN

A study of the chironomid community was undertaken in Lake Łękuk Wielki during the 1997-1999 period. Twenty six taxon belonging to the subfamilies Tanypodinae and Chironomini were identified. Taxonomic diversity decreased with increasing depth in the lake, but the occurrence of Chironomidae larvae was noted even in the deepest part of the lake. Chironomidae clearly indicated that Lake Łękuk Wielki is recovering.

9

Changes in the phytoplankton community of a lake restored with phosphorus inactivation (Lake Głęboczek, northern Poland)

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Jaworska B. , Gawrońska H. , Łopata M.

Oceanological and Hydrobiological Studies

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2009

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tom Vol. 38, No.1

93-101

EN

The study applied qualitative and quantitative phytoplankton analysis as a tool for determining algal community characteristics and identifying the directions and general trends of changes caused by the restoration of Lake Głęboczek through phosphorous inactivation before and during its application. The method applied in the studied lake aimed at reducing phosphorous availability through the chemical precipitation of its excess mineral forms in the water body and limiting their mobility in the bottom sediments. Restoration efforts led to shifts in the phytoplankton domination structure followed by the inhibition of blue-green algae development. In consequence, a significant decrease was recorded in the growth rate of the phytoplankton community.

10

Seasonal Variability of Physicochemical Parameters of Water Quality on Length of Uszwica River

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Bogdał A. , Kowalik T. , Ostrowski K. , Skowron P.

Journal of Ecological Engineering

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2016

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tom Vol. 17, nr 1

161--170

EN

The Uszwica river catchment is located in the central part of Lesser Poland province, within Brzeski and Bocheński districts. The river is 61.2 km long, and its catchment area is 322.5 km2. It is characterized by forest-agricultural land use and high share of residential areas of both compact (the city of Brzesko) and dispersed nature. In the abiotic terms, the Uszwica in its upper course may be classified as a flysch stream (type 12). From the moment of joining the Niedźwiedź, stream until its discharge into the Vistula at km 151+700 it is a sand and clay lowland river (type 19). Hydrochemical research were conducted in the years 2011 and 2012 at two measurement-control points – one located near the mouth of the river (point 1) and one located about 7.5 km downstream from the city of Brzesko (point 2). Each month 18 water quality parameters were determined and they underwent comparative and statistical analyses. Basic descriptive statistics were calculated for both measurement-control points. Then, they were used to determine the ecological potential of the river and to evaluate water quality parameters with respect to its suitability as fish habitat and eutrophication risk. Significance of differences between the values of individual parameters recorded at different measurement-control points was estimated using non-parametric Mann-Whitney U test for α = 0.05. The same test was used to determine the significance of differences between individual parameters for the winter and summer season at each point. Analysis of the results revealed that water flowing via developed areas (point 2) was significantly less saturated with oxygen and contained higher amounts of suspended solids, organic matter and nutrients, as compared to the section of the river flowing mainly through extensively used agricultural areas. Therefore, the ecological potential of the river was considered good in its lower course and poor upstream from point 2. Disturbances in seasonal concentrations of some biogenic factors indicated high degree of water pollution in the middle course of the Uszwica. However, due to intense self-purification, water quality in the lower course was similar to that in natural conditions. On the entire investigated section of the Uszwica does not meet water quality requirements for salmonids and cyprinids, but the habitats are more favorable near the mouth of the river. Waterassessed at point 2 may be classified as eutrophic due to high concentration of total phosphorus.

11

Phytoplankton blooms - a "fever" of the Baltic ecosystem [commun.]

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Kowalewska G.

Oceanologia

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1999

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tom No. 41 (2)

265-275

EN

This paper examines the phenomenon of Baltic phytoplankton blooms in a new light. They are investigated from the standpoint of the author's own studies of chlorophyll and its derivatives in deep Baltic sediments, and of the influence of inorganic and organic pollutants on unicellular algae. Algal blooms in the Baltic should be perceived as perfectly normal phenomena that are neither time- nor space-specific. At the same time, they are signals given by the basin that something - not necessarily the level of nutrients - has changed in the environment and are a response of the ecosystem to that change.

12

Rekultywacja zbiorników wodnych metodą inaktywacji fosforu

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Dziaman R.

Technologia Wody

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2011

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tom Nr 3 (11)

50-51

13

Ekonomiczne i ekologiczne aspekty budowy i funkcjonowania małej retencji wodnej na Podlasiu

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Siemieniuk A. , Szczykowska J. , Miłaszewski R.

Ekonomia i Środowisko

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2015

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tom nr 2

103--111

EN

It should be taken into account, while creating programs for small water retention, that positive results may be obtained only in the case of clear water retention. During construction of small water reservoirs, cost effectiveness of maintenance as well as quality of stream water inlet should be taken into account. The atricle presents conditions of water retention in small reservoirs in the Podlaskie Voivodeship, forms of financing andd their dependance of the type of investment. Soil quality and the use of land for agricultural purposes have an effect on the quality of water in the reservoir basin. This generates a cost increase brought by a need to reclaim the existing reservoirs.

14

Problemy z uzdatnianiem wód zeutrofizowanych

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Domańska M. , Wiercik P. , Idzikowski R.

Przegląd Naukowy Inżynieria i Kształtowanie Środowiska

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2009

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tom Vol. 18, No. 3

56--64

PL

Artykuł porusza problem związany z uzdatnianiem wód zeutrofizowanych. W pracy omówiono przyczyny i zagrożenia dla organizmów zamieszkujących i korzystających z wody pochodzącej ze zbiorników o nadmiernej ilości fitoplanktonu. Jednym z najważniejszych zagrożeń są produkowane przez sinice toksyny, których usunięcie z wody stanowi znaczne utrudnienie w uzdatnianiu. Sama obecność glonów jest źródłem dodatkowej ilości węgla organicznego i przyczynia się do powstawania ubocznych produktów dezynfekcji wody. W pracy przedstawiono przykłady usprawnienia technologii uzdatniania dla wód zawierających nadmierne ilości fitoplanktonu.

EN

This article concerns problems with the eutrophicated water treatment process. The main thread of the article is dedicated to some causes and risks which are associated especially with many organisms living in polluted reservoirs. The main threat in particular comes from the toxic substances produced by Cyanophyta that is directly connected with its living processes which complicates the whole water treatment process. The presence of Cyanophyta in water is a source of organic carbon and contributes to disinfection by-products. This work provides the examples of improving water treatment technology for water with excessive number of phytoplankton.

15

New approach to trophic state assessment of running waters in Poland

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Neverova-Dziopak E. , Kowalewski Z.

Meteorology Hydrology and Water Management. Research and Operational Applications

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2013

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tom Vol. 1, Iss. 1

15--21

EN

The problem of eutrophication has, since the 1970s, reached a global scale and become a problem of principal importance due to its negative consequences, which could result in the total loss of biospheric functions of aquatic ecosystems, and also their economic role. The increasing intensity of eutrophication processes and their specificity in various types of waters requires the development of special methods of control and protection of aquatic ecosystems. As a result of the high dynamism of eutrophication and its dependence on different factors (hydrological, hydrodynamic, hydrobiological, morphological, edaphic and climatic conditions), the assessment of trophic status in order to control and manage this process is very complicated. The evaluation of the consequences of anthropogenic eutrophication and the scale of its development can be provided only on the basis of systematic observation during a multi-annual period. Careful analysis of the state of knowledge on the issues related to eutrophication, especially the methods of trophic status assessment, have allowed us to conclude that at present there is no universal methodology for the assessment of the surface water trophic level, while the existing methods have various shortcomings, which reduce the reliability of the results and complicate the development of appropriate technical, organizational and legal protection measures. A critical analysis of trophic status assessment approaches for different categories of waters has also allowed us to state that there is no an appropriate method for the assessment of the trophic status of running waters, since almost all existing assessment methods are developed for lakes and coastal areas. This paper presents an original approach elaborated for the assessment of the trophic state of running waters based on the statistical analysis of long-term monitoring data and numerical criterion ITS, which allows for a simple and low-cost monitoring of eutrophication suitable for the solving of different application tasks in the field of surface water protection.

16

In situ measurements and satellite remote sensing of case 2 waters: first results from the Curonian Lagoon

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Giardino C. , Bresciani M. , Pilkaityte R. , Bartoli M. , Razinkovas A.

Oceanologia

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2010

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tom No. 52 (2)

197-210

EN

In this study we present calibration/validation activities associated with satellite MERIS image processing and aimed at estimating chl a and CDOM in the Curonian Lagoon. Field data were used to validate the performances of two atmospheric correction algorithms, to build a band-ratio algorithm for chl a and to validate MERIS-derived maps. The neural network-based Case 2 Regional processor was found suitable for mapping CDOM; for chl a the band-ratio algorithm applied to image data corrected with the 6S code was found more appropriate. Maps were in agreement with in situ measurements. This study confirmed the importance of atmospheric correction to estimate water quality and demonstrated the usefulness of MERIS in investigating eutrophic aquatic ecosystems.

17

Utilizing the Eutrophication in Bioresources Recovery and Biogas Production – A Case Study in Egypt

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Khalil M. M. , Ficara E. , Colaninno N. , EL-Baz A.

Journal of Ecological Engineering

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2022

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tom Vol. 23, nr 12

299--313

EN

In this work, the nutrients and eutrophication problem are integrated into a nature-based solution by incorporating microalgae-based nutrient removal from wastewater and collecting the residue in an anaerobic digestion plant to produce biogas that is directly exported to an existing gas-fired power plant and closes the bioresource loop. El Burullus lake in Egypt was selected as a case study because it is rich in nutrients and suitable for the integrated system. The theoretical results were promising as for one-hectare, nutrient pollution could be reduced with a total nitrogen removal rate of 4 kg•d-1, a total phosphorus removal rate of 1.1 kg•d-1, and a total COD removal rate of 9.3 kg•d-1. The digester volume corresponding to the biomass produced was 120 m3 per hectare of algae pond and the methane yield () from anaerobic digestion was 73 m3•d-1.

18

Eutrophication as a Priority Issue of Water Quality in Small Retention Reservoirs

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Siemieniuk A. , Szczykowska J. , Wiater J.

Journal of Ecological Engineering

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2016

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tom Vol. 17, nr 3

143--147

EN

The study aimed at comparing changes in the trophic status of waters in two small retention reservoirs “Otapy-Kiersnówek” and “Jasionówka”, located in the Podlasie region, which have a similar way of management and the similarity of catchments, using the TSI trophy indicators. The obtained results show that total phosphorus is the limiting factor in both reservoirs. Analyzing the average annual value of TSI in the tested waters, it was found that both reservoirs can be classified as hypertrophic. Trophic state of the tested waters is strictly dependent on the processes taking place in their vicinity. The reservoirs revealed a clear effect of a surface runoff on water quality. Factors that favor the poor quality of water in both reservoirs are unfavorable morphometric conditions of reservoirs due to their small depth, which allows continuous mixing and strong heating of water in spring and summer. Additional causes can include an open space around the reservoirs and the lack of high vegetation that would shield the edges against the wind, which facilitates often mixing of waters to the bottom and resuspension of bottom sediments, which in turn increases the concentration of phosphorus in water.

19

Trophic State Indexes and Phytoplankton in the Trophic Status Assessment of Waters of a Small Retention Reservoir at an Early Stage of Operation

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Suchora M. , Szczurowska A. , Niedźwiecki M.

Journal of Ecological Engineering

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2017

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tom Vol. 18, nr 5

209--215

EN

This paper will focus on determining the trophic status of the two basins of the Niwa Reservoir – Niwa I and Niwa II (Sawin commune, Lubelskie Province, SE Poland) at the sixth year of operation, by using partial TSI indexes – TSI(SD), TSI(TP), TSI(chl-a), as well as qualitative and quantitative structures of phytoplankton. As a supplementary, index TSI(TOC) was employed. We show that the phytoplankton abundance, as well as TSI(chl-a) and TSI(TP) were relatively low and typical for mesotrophic waters (with the exception of July TSI(TP) values for the Niwa II basin), although the evaluation of trophy based on other partial TSI indexes – TSI(SD), TSI(TOC) pointed to a eutrophic or even a hypertrophic water characteristic. The obtained results were discussed in detail and referenced to other, non-nutrient related trophy factors: morphometric features and geology of the basins, as well as the physicochemical properties of its water.

20

Recirculating Airlift for Aeration of Shallow Water Bodies

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Tavrel M. , Kostenko V. , Bohomaz O. , Kostenko T. , Zemlianskyi O. , Pidhornyy M.

Ecological Engineering & Environmental Technology

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2022

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tom Vol. 23, iss. 5

177-187

EN

The article is devoted to solving the issue of ensuring the efficient operation of aeration equipment in the conditions of shallow water bodies with an average depth of only a few meters. The article offers a technical solution for reducing the size of airlift aerators and increasing their performance by creating a recirculation movement of water inside the unit. With the help of a laboratory model, it was established that the dynamics of oxygenation of water in the pool with the help of a recirculating airlift is subject to a logarithmic dependence on the size of the flow regulator. It was possible to increase the oxygen concentration in the pool by 2.6 times within three hours as part of the simulation. The rate of water oxygenation was much higher than for a conventional airlift of the same size. The offered cost-efficient aeration unit, which uses wind flow as an energy source, can be used for fish farms and other applications.