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The Successful Results of Pławniowice Reservoir (Upper Silesia Region – South of Poland) Restoration by Hypolimnetic Withdrawal

Archives of Environmental Protection | 2013 | vol. 39 | No 1 | DOI: 10.2478/aep-2013-0004

Keywords Lakes restoration hypolimnetic withdrawal

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Abstract

The inter-reservoir enrichment phenomenon was exploited to curtail the reservoir eutrophication process. The Plawnowice reservoir (South Poland - Upper Silesia Region) has an area of 225 ha, volume of 29 mln m3, and a depth of 15 meters. According to the monitoring results in the years 1993-1998 the reservoir was qualified as hypereutrophic. Beginning in December 2003 a bottom pipe for hypolimnetic withdrawal was installed. In the period 2004-2010 a negative phosphorous balance was achieved. The discharge load of total phosphorous was in the beginning twice as high as the inflowing. During the first eight years with an inflow of 75 Mg P, the removed load of total phosphorus was 103 Mg P. In effect the net balance was 28 Mg P. The load, in respect to the surface area, of 2.2 to 3.3 gP/m2 per year, was reduced to a negative load of - 0.48 to - 3.3 gP/m2. The hypolimnetic maximum concentration of orthophosphates equal to 1.254 mg P-PO4/dm3 in 2004, was reduced to 0.236 mg P-PO4/dm3 in 2011. The respective factors and rate of eutrophication curtailing, including changes of phosphorus compounds have been discussed. Also changes of pH and visibility of the Secchi disc are presented. It was concluded that the presented method of hypolimnetic withdrawal is a lasting and effective process

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Authors and Affiliations

Maciej Kostecki

Jan Suschka

Differentiation of the macrophytes structure in the basins of flow and inflow lakes

Andrzej Demetraki-Paleolog Joanna Sender Magda Garbowski Marcin Kolejko

Teka Komisji Ochrony I Kształtowania Środowiska Przyrodniczego | 2016 | Vol XIII

Keywords flow lakes inflow lakes emergent macrophytes usage of buffer zone

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Abstract

The aim of this study was to analyze the influence of water movement on both qualita-tive and quantitative occurrence of macrophytes in lakes. We studied four lakes differentiated in respect of water supply (two flow and two inflow).The investigation included: determination of the buffer zones of lakes, analysis of land use forms and layout of the buffer zone, floristic charac-teristic of lakes littoral, characteristic of phytolittoral types, analysis of physical and chemical parameters of lakes. The buffer zone of the flow lakes was dominated by farmland, but there was no land meadow. In the inflow lakes co-dominated fields and forests in the buffer zone. The in-flow lakes characterized by greater species diversity, density and biomass of emergent macro-phytes. In all investigated lakes, in the zone of water supply, analyzed features of macrophytes, and selected chemical parameters of water, reached the highest value.

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Authors and Affiliations

Andrzej Demetraki-Paleolog

Joanna Sender

Magda Garbowski

Marcin Kolejko

An application of a water assessment and simulation model in the remediation of the eutrophication capacity of a tropical water system: Case study the Lake Obili in Yaounde (Cameroon)

Gideon A. Ajeagah W. Victorien B. Abanda George E. Nkeng

Journal of Water and Land Development | 2017 | No 33

Keywords Africa lakes modelling pollution water

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Authors and Affiliations

Gideon A. Ajeagah

W. Victorien B. Abanda

George E. Nkeng

Hydrography, hydrochemistry and composition of sapropel of Shatsk Lakes

Valentyn Khilchevskyi Leonid Ilyin Mykhailo Pasichnyk Myroslava Zabokrytska Olga Ilyina

Journal of Water and Land Development | 2022 | No 54 | 184-193 | DOI: 10.24425/jwld.2022.141571

Keywords bottom sediments lake sapropel Shatsk Lakes

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Abstract

The purpose of the study presented in the article is to implement modern hydrographic characteristics of freshwater of the Shatsk Lakes (28 lakes in Volyn Polissya, Ukraine) by typing water bodies according to the requirements of the EU Water Framework Directive, assessment of the chemical composition of lake water and bottom sediments (sapropel), determination of the opportunity for their recreational use in the special status of the district as a national park. Despite the presence of the two large lakes (Svityaz – 26.2 km ² and Pulemetske – 15.5 km ²), very small lakes with a water surface area of less than 0.5 km ² (64%) are dominating in the Shatsk group. Mineralisation of calcium-hydrocarbonate lake waters is 115–303 mg∙dm ^–3 and calcium-sulphate aqueous extract of sapropel is – 318–1451 mg∙dm ^–3. Using a Piper diagram, it was found that there is genetic homogeneity between surface and groundwater, indicating a significant share of groundwater in the water supply of lakes. There are eight species of sapropel deposits in 19 lakes of the district. A wide range of chemical composition and physical and mechanical properties of sapropel deposits of the Shatsk Lakes allow us to consider them as an important resource for agriculture and industry. We found that sapropel from Shatsk Lakes meets the requirements for therapeutic mud and can be used for therapeutic and health purposes.

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Authors and Affiliations

Valentyn Khilchevskyi

1

e-mail:

ORCID:

Leonid Ilyin

2

e-mail:

ORCID:

Mykhailo Pasichnyk

2

e-mail:

ORCID:

Myroslava Zabokrytska

2

e-mail:

ORCID:

Olga Ilyina

2

e-mail:

ORCID:

Taras Shevchenko National University of Kyiv, Department of Hydrology and Hydroecology, Kyiv, Ukraine
Lesya Ukrainka Volyn National University, Faculty of Geography, 13 Voli Avenue, 43025, Lutsk, Ukraine

Influence of habitat conditions on the occurrence of epiphytic invertebrate fauna in oxbow lakes

Monika Tarkowska-Kukuryk Wojciech Płaska Tomasz Mieczan Jacek Rechulicz Wojciech Pęczuła

Teka Komisji Ochrony I Kształtowania Środowiska Przyrodniczego | 2016 | Vol XIII

Keywords oxbow lakes environmental conditions macrophytes epiphytic fauna

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Abstract

The relationships between epiphytic fauna and habitat conditions were studied in three oxbow lakes of Wieprz River (eastern Poland). Fauna associated with macrophytes showed low species richness (range 8–11 taxa dependently on site and season) usually observed in lakes of high water trophy. Densities of fauna were high (mean 71–5250 ind. 100 g DW-1), typical for shallow lakes with well developed submerged vegetation. In the domination structure prevailed Gastropoda (relative abundance 23–100%) and Chironomidae (relative abundance 8–87%). Re-dundancy analysis showed the significance of four environmental variables – temperature, dis-solved oxygen, Ptot and P-PO4 as determinants of abundance of epiphytic fauna.

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Authors and Affiliations

Monika Tarkowska-Kukuryk

Wojciech Płaska

Tomasz Mieczan

Jacek Rechulicz

Wojciech Pęczuła

Effects of submerged macrophytes on the concentrations of phosphorous and chlorophyll a under experimental conditions

Monika Tarkowska-Kukuryk Wojciech Pęczuła Tomasz Mieczan Wojciech Płaska Jacek Rechulicz

Teka Komisji Ochrony I Kształtowania Środowiska Przyrodniczego | 2015 | Vol XII

Keywords macrophytes shallow lakes trophic conditions eutrophication

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Abstract

The role of two submerged macrophyte species (Ceratophyllum demersum and Potamogeton pectinatus) as biological factor affecting concentrations of P and chlorophyll a concentrations was tested under laboratory conditions. In general, after four weeks exposition, the significant reduction of TP, P-PO4 and chlorophyll a was observed in all experimental variants (aquaria with P. pectinatus, C. demersum and P. pecinatus + C. demersum), but the highest decrease of phosphorous compounds (TP, P-PO4) was noted in aquarium with C. demersum, whereas the highest decline of chlorophyll a concentration (biomass of phytoplankton) was observed in aquarium with C. demersum + P. pectinatus. Together with the reduction of chemical parameters the biomass of macrophytes as well mean length of plant shoots significantly increases. The highest growth of shoots and biomass showed C. demersum.

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Authors and Affiliations

Monika Tarkowska-Kukuryk

Wojciech Pęczuła

Tomasz Mieczan

Wojciech Płaska

Jacek Rechulicz

Interactions within macrophytes in some small lakes from Polesie Lubelskie region

Andrzej Demetraki-Paleolog Joanna Sender Marcin Kolejko

Teka Komisji Ochrony I Kształtowania Środowiska Przyrodniczego | 2015 | Vol XII

Keywords macrophytes biomass shallow lakes land use phytolittoral

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Abstract

Due to the significant role of macrophytes in the functioning of lake ecosystems studies have been undertaken to examine whether mutual dependence is present within emergent, floating-leaved, and submerged aquatic macrophytes. The study included 5 small lakes from Polesie Lubelskie region. The research included: qualitative analysis of macrophytes (area occupied by macrophytes, composition, range of individual plant groups of occurrence), quantitative analysis of macrophytes (biomass of macrophytes inhabiting the lake), analysis of distribution as well as characteristics diversity of shoreline and surrounding land use. Because of differences in the environmental conditions, mostly light availability, usage of buffer zone, among the three macrophyte groups, changes in biomass were analyzed in this work suggests that complementarity not competition drive the community. This phenomenon seems to occur only in macrophyte lakes where all three groups are present and the surrounding buffer zones remain natural. In lakes where one of the three groups of macrophytes were missing, it is likely that the ecological roles are fulfilled by other plant groups, such as phytoplankton. The studied lakes represent both phytoplanton and macrophyte type of lakes.

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Authors and Affiliations

Andrzej Demetraki-Paleolog

Joanna Sender

Marcin Kolejko

Cyanobacterial blooms in kaliski region water reservoirs and water quality parameters / Zakwity sinicowe w zbiornikach okolic Kalisza a wskaźniki jakości wody

Dominik Szczukocki Radosław Dałkowski Barbara Krawczyk Renata Juszczak Luiza Kubisiak-Banaszkiewicz Barbara Olejniczak Grzegorz Andrijewski

Archives of Environmental Protection | 2015 | vol. 41 | No 1 | DOI: 10.1515/aep-2015-0002

Keywords artificial lakes eutrophication cyanobacterial blooms cyanotoxins

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Abstract

Cyanobacterial blooms occur frequently in artificial lakes, especially in water reservoirs with small retention exposition to anthropopressure. The abundant occurrence of cyanobacteria is accompanied by danger of oxygen imbalance in the aquatic environment and the secretion of toxins that are possible threat to human health and life. Cyanobacterial cell growth depends on a number of physical (temperature, light exposure), chemical (pH, concentration of compounds containing nitrogen and phosphorus) and biological (the presence of other organisms) factors. This paper presents the results of the analysis of water from reservoirs located in southern Wielkopolska region (Pokrzywnica-Szałe, Gołuchów and Piaski-Szczygliczka). Some important physico-chemical parameters of water samples taken from investigated reservoirs as well as cyanotoxins concentration were determined. Furthermore, the cyanobacterial species were identified. There was also an attempt made to correlate the water parameters with the cyanobacteria development and cyanotoxins production. On the basis of the results obtained in the analyzed season, it can be concluded that water from Pokrzywnica and Gołuchów reservoirs was rich in nutrients, hence the intense cyanobacterial blooms and cyanotoxins in water were observed

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Authors and Affiliations

Dominik Szczukocki

Radosław Dałkowski

Barbara Krawczyk

Renata Juszczak

Luiza Kubisiak-Banaszkiewicz

Barbara Olejniczak

Grzegorz Andrijewski

Microplastics in coastal sediments of Ełckie Lake (Poland)

Weronika Rogowska Elżbieta Skorbiłowicz Mirosław Skorbiłowicz Łukasz Trybułowski

Studia Quaternaria | 2021 | vol. 38 | No 2 | 109-116 | DOI: 10.24425/sq.2021.136827

Keywords microplastics lake coastal sediments

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Abstract

Plastics are materials with many properties that make them extremely popular in everyday life and various industries. Studies show that plastic debris is global pollution and widespread in virtually all ecosystems. This study aimed to assess the coastal sediments of Ełckie Lake in terms of the presence of microplastics. Samples of sediments (n = 37) from the coastal zone of Ełckie Lake were drawn from different areas, including urban, rural, and tourist locations, and beaches. After the coastal sediment samples taking, they were subjected to density separation, filtration, and visual evaluation using the Olympus BX63 fluorescent microscope. Particles were classified according to the category of visible characteristics of microplastics including size, shape and colour. The results of the study showed the presence of microplastics in 84% of the examined coastal sediment samples of Ełckie Lake. Fibres, flakes, granules, and foils (films) had found in 58%, 45%, 32%, and 13% of the samples that contained microplastic, respectively. The majority of the detected microplastic was 0.5–1 mm in size and black was the dominant colour. Spatial variability was perceived in microplastic concentrations, giving premises to the assumption of dependence between local human activity and the content of particles.

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Authors and Affiliations

Weronika Rogowska

1

Elżbieta Skorbiłowicz

1

Mirosław Skorbiłowicz

1

Łukasz Trybułowski

1

Bialystok University of Technology, Faculty of Civil Engineering and Environmental Sciences, Department of Technology in Environmental Engineering, Wiejska 45E, 15-351 Białystok, Poland

Invertebrate communities of the High Arctic ponds in Hornsund

Tomi P. Luoto Mimmi Oksman Antti E.K. Ojala

Polish Polar Research | 2016 | vol. 37 | No 1 | 105-119 | DOI: 10.1515/popore−2016−0003

Keywords aquatic invertebrates Arctic bird impact climate change polar lakes

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Abstract

How environmental conditions influence current distributions of organisms at the local scale in sensitive High Arctic freshwaters is essential to understand in order to better comprehend the cascading consequences of the ongoing climate change. This knowledge is also important background data for paleolimnological assessments of long-Term limnoecological changes and in describing the range of environmental variability. We sampled five limnologically different freshwater sites from the Fuglebergsletta marine terrace in Hornsund, southern Svalbard, for aquatic invertebrates. Invertebrate communities were tested against non-climatic environmental drivers as limnological and catchment variables. A clear separation in the communities between the sites was observed. The largest and deepest lake was characterized by a diverse Chironomidae community but Cladocera were absent. In a pond with marine influence, crustaceans, such as Ostracoda, Amphipoda, and calanoid Copepoda were the most abundant invertebrates. Two nutrient-rich ponds were dominated by a chironomid, Orthocladius consobrinus, whereas themost eutrophic pond was dominated by the cladoceran Daphnia pulex, suggesting decreasing diversity along with the trophic status. Overall, nutrient related variables appeared to have an important influence on the invertebrate community composition and diversity, the trophic state of the sites being linked with their exposure to geese guano. Other segregating variables included water color, presence/absence of fish, abundance of aquatic vegetation and lake depth. These results suggest that since most of these variables are climate-driven at a larger scale, the impacts of the ongoing climate change will have cumulative effects on aquatic ecosystems.

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Authors and Affiliations

Tomi P. Luoto

Mimmi Oksman

Antti E.K. Ojala

INITIAL TIME OF TWO HIGH ALTITUDE CRATER LAKES (NEVADO DE TOLUCA, CENTRAL MEXICO) RECORDED IN SUBFOSSIL CLADOCERA

Krystyna Szeroczyńska Edyta Zawisza Marta Wojewódka

Studia Quaternaria | 2015 | Vol. 32 | Iss. 2

Keywords crater lakes Sol and Luna Lakes palaeolimnological studies Cladocera and chemical components Nevado de Toluca Central Mexico

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Authors and Affiliations

Krystyna Szeroczyńska

Edyta Zawisza

Marta Wojewódka

Theoretical efficiency of the pulverising aerator – A case study based on Lake Swarzędzkie

Andrzej Osuch Ewa Osuch Piotr Rybacki Marcin Herkowiak Emilia Osuch

Journal of Water and Land Development | 2023 | No 57 | 204-209 | DOI: 10.24425/jwld.2023.145351

Keywords lake aeration Lake Swarzędzkie pulverising aerators wind energy

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Abstract

Lakes can be restored by the aeration method with the use of wind driven pulverising aerators. The method allows for moderate oxygenation of hypolimnion waters and it may be part of an integrated surface waters restoration system. The paper attempts to use the author’s method of maximum wind speeds to assess the volumetric flow of water through the aerator pulverisation mechanism. The study was conducted in 2018 in windy conditions of Lake Swarzędzkie. The introduction to the paper includes the characteristic of the lake and discusses the construction and operation of the wind driven pulverising aerator. Based on the maximum wind speed model, the theoretical capacity of the machine was calculated, which in the conditions of Lake Swarzędzkie was less than 111,500 m3 per year. Based on maximum wind speeds, the method of assessing the efficiency of the wind driven pulverising aerator is suitable for determining the volumetric flow rate of the pulverisation unit. This can significantly facilitate the planning of water reservoir restoration.

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Authors and Affiliations

Andrzej Osuch

1

e-mail:

ORCID:

Ewa Osuch

1

e-mail:

ORCID:

Piotr Rybacki

2

e-mail:

ORCID:

Marcin Herkowiak

3

e-mail:

ORCID:

Emilia Osuch

4

Poznań University of Life Sciences, Department of Biosystems Engineering, 50 Wojska Polskiego St., 60-637 Poznań, Poland
Poznań University of Life Sciences, Department of Agronomy, Poznań, Poland
Institute of Technology and Life Sciences – National Research Institute, Falenty, Poland
Vocational School Complex No 6, names Joachim Lelewel in Poznań, Poland

Subfossil Chydorid taxa and assemblages from lake sediments in Poland and Finland with special reference to climate

Kaarina Sarmaja-Korjonen Krystyna Szeroczyńska Michał Gąsiorowski

Studia Quaternaria | 2003 | Vol.20 | 25-34

Keywords subfossil Cladocera chydorids Finnish lakes Polish lakes climate redundancy analysis

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Abstract

In this study we compared chydorid cladoceran (Chydoridae) taxa and assemblages from sediments of 6 Polish and 6 Finnish lakes and investigated if the difference in climate of these two countries can be detected in the cladoceran data. The data were analysed in terms of I) average relative proportions of chydorid taxa during the history of each lake and by 2) redundancy analysis (RDA) to explain the present effect of environmental variables (altitude, area, maximum depth, mean annual temperature, mean summer temperature and length of the growing season) on species abundances. The redundancy analysis (RDA) enabled us to distinguish groups of taxa I) with a high thermal preference 2) associated with small, cold-water lakes and 3) associated with shallow lakes. There are clear differences in the dominant chydorid taxa and in the relative proportions of many other chydorid taxa between the two countries since the end of the last glaciation. Although these differences first of all appear to reflect the climatic difference, the influence of many other environmental factors, controlling the living conditions of particular chydorids have been raised and considered. Further studies with larger data are needed before the role of climate can be reliably separated from other elements of environment.

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Authors and Affiliations

Kaarina Sarmaja-Korjonen

Krystyna Szeroczyńska

Michał Gąsiorowski

Does One Straw Really Matter?

Wojciech Pol Karolina Mierzyńska

ACADEMIA. The magazine of the Polish Academy of Sciences | 2023 | No 2 (78) Pollution | 46-48 | DOI: 10.24425/academiaPAS.2023.147026

Keywords microplastics water ecology lake pollution

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Abstract

Plastic is present everywhere. What happens to it and what impact does it have on the world around us?

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Wojciech Pol

1

Karolina Mierzyńska

1

Faculty of Biology, University of Białystok

Thermal and Oxygenic Characteristic of Rzuno Lake (Kaszuby Lakeland)

Jan Trojanowski Janusz Bruski

Archives of Environmental Protection | 2002 | vol. 28 | No 1 | 81-95

Keywords oxygen temperature reaction chlorophyll a lake

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Abstract

The oxygen and chlorophyll a contents. pH, temperature and transparency were studied in Lake Rzuno in the period from June 1998 - September I 999. This lake has a very strong thermal stratification and weaker oxygenic stratification. The degree of surface water saturation with oxygen was rather small (max. 136%) but the oxygen conditions in the whole Lake Rzuno were good because the total lack of oxygen is noted only in summer and only below 20 m depth. Whereas during autumn and spring circulation the oxygen concentration reaches 5 mg O, drn' al the bottom. The correlation between visibility of Secchi disc and chlorophyll a concentration featured high correlation indicator (r = -0.87). The awerage water transparency, low oxygen deficit and small changes in water reaction show that this lake has moderate eutrophic character.

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Authors and Affiliations

Jan Trojanowski

Janusz Bruski

Nitrogen and Phosphorus Compounds in Lake Pluszne

Jolanta Katarzyna Grochowska Renata Tandyrak

Archives of Environmental Protection | 2007 | vol. 33 | No 1 | 59-66

Keywords lake eutrophication nutrients nitrogen phosphorus

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Authors and Affiliations

Jolanta Katarzyna Grochowska

e-mail: jgroch@uwm.edu.pl

ORCID:

Renata Tandyrak

Copper, Zinc, Manganese, Lead and Cadmium in Plants of Gardno Lake

Piotr Trojanowski Jan Trojanowski Agnieszka Parzych

Archives of Environmental Protection | 2005 | vol. 31 | No 4 | 45-58

Keywords lake plants heavy metals phytosorption

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Authors and Affiliations

Piotr Trojanowski

Jan Trojanowski

Agnieszka Parzych

Geochemical characteristics of Hoglandvatnet and Alandvatnet, central Spitsbergen

Anna Stankowska

Polish Polar Research | 1989 | vol. 10 | No 3 | 429-442

Keywords Arctic Spitsbergen lake water chemistry

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Abstract

The Hoglandvatnet and Ålandvatnet are genetically associated with the action of a large ice stream issuing from Mittag-Lefflerbreen towards Lomonosovfonna as far nortwards as Austfjorden. The accomplished investigations permit water properties to be described for Hoglandvatnet and Ålandvatnet, as well as the chemical composition of the basin waters to be correlated with lithologic diversity of the surrounding massifs and the composition of glacier water feeding them. Water of Hoglandvatnet has a rather uniform ion composition. It is sulphate-calcium water. Low mineral contents of glacier water and that flowing through crystalline rocks of Framstaken and feeding the basin result in its less marked effect on the Hoglandvatnet water, compared with highly mineralized water of streams issuing from Trikolorfjellet and Tarantellen. Water of Ålandvatnet has a somewhat different quantitative ion composition than that of Hoglandvatnet. It is calcium-sulphate-bicarbonate water which is richer in the bicarbonate ion than the Hoglandvatnet waters. This is most likely due to the influence of bicarbonate water of Ålandelva and glacier water feeding the basin. It can also be the result of a smaller contribution from highly mineralized calcium-sulphate water issuing from Trikolorfjellet.

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Authors and Affiliations

Anna Stankowska

Identification of processes controlling chemical composition of pit lakes waters located in the eastern part of Muskau Arch (Polish-German borderland) / Identyfikacja procesów kształtujących skład chemiczny wód zbiorników zlokalizowanych na obszarach pogórniczych we wschodniej części Łuku Mużakowa (pogranicze polsko-niemieckie)

Sylwia Lutyńska Krzysztof Labus

Archives of Environmental Protection | 2015 | vol. 41 | No 3 | DOI: 10.1515/aep-2015-0031

Keywords Muskau Arch acid mine drainage pit lakes statistical and speciation analysis

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Abstract

Exploitation of lignite within the area of Muskau Arch, carried out from the mid-nineteenth century, contributed to the transformation of the natural environment and changes in water regime. In the post-mining subsidences pit lakes were formed. The chemical composition of waters is a consequence of the intensive weathering of pyrite (FeS2), which is present in Miocene lignite-bearing rock forming the embankments of the lakes. This process leads to the formation of Acid Mine Drainage (AMD) and finally acidification of lake waters.

This paper presents results of the identification of hydrogeochemical processes affecting the chemistry of waters from these reservoirs carried out using the speciation and statistical (cluster and factor) analyses. Cluster analysis allowed to separate from the analyzed group of anthropogenic reservoirs 7 subgroups characterized by a similar chemical composition of waters. The major processes affecting the chemistry of waters were identified and interpreted with help of factor and speciation analysis of two major parameters (iron and sulfur).

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Authors and Affiliations

Sylwia Lutyńska

Krzysztof Labus

Speciation Analysis for Determinations of Arsenic, Antimony and Selenium in Water Samples from the Lednickie Lake

Przemysław Niedzielski Jerzy Siepak Zenon Kowalczuk

Archives of Environmental Protection | 2000 | vol. 26 | No 1 | 73-82

Keywords speciation arsenic antimony selenium atomic absorption lakes

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Authors and Affiliations

Przemysław Niedzielski

Jerzy Siepak

Zenon Kowalczuk

Periphyton Inhabiting Reed, Phragmites Australis and Artificial Substrate in the Eutrophicated Lubowidzkie Lake

Krystian Obolewski

Archives of Environmental Protection | 2006 | No 3 | 67-82

Keywords periphytou biotic substrates fouling Polish Pomeranian Lake

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Authors and Affiliations

Krystian Obolewski

Influence of a Multi-Year Artificial Aeration of a Lake Using Destratification Method on the Sediment-Water Phosphorus Exchange

Renata Brzozowska Helena Gawrońska

Archives of Environmental Protection | 2005 | vol. 31 | No 3

Keywords lake restoration artificial mixing internal loading phosphorus

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Abstract

The research was conducted in a relatively small (26.8 ha) but quite deep (17.3 m) Lake Długie in Olsztyn, Poland. For over 20 years the lake was collecting sewage which eventually caused its complete degradation. In 1987-2000 the lake was restored using the artificial aeration method with destratification of water. The results showed that the artificial aeration effectively limited the internal loading. Application of this restoration method resulted in reduction of phosphorus compounds concentrations in the analyzed water strata. The decrease of TP in bottom sediments (to the level of 3-4 mg P g·' DW) was probably associated with the fact that a new layer of sediments was created, reflecting a change in the aquatic conditions caused by the restoration. The investigations conducted in the reference years showed that the changes were not permanent. A high concentration of phosphorus compounds in bottom sediments, low sorptivc capacity and a tendency to oxygen deficiency, indicate that further possibility to decrease the amount of phosphorus compounds in the lake by this restoration method is limited.

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Authors and Affiliations

Renata Brzozowska

Helena Gawrońska

Observations of Selected Chemical Components of Meromictic Lake Zapadłe Waters in 1990-1993, 2000-2001 and 2005-2006

Renata Tandyrak Mariusz Teodorowicz Joanna Gorchowska

Archives of Environmental Protection | 2010 | vol. 36 | No 3 | 75-82

Keywords lake meromixis conductivity organic matter nitrogen phosphorus

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Abstract

Studied was a small (4.6 ha) meromictic lake situated in a deep land hollow surrounded by a highinclination slope. The lake was made shallower two times (from 20 to 18 m) by collapsed shores. It is fed by underground waters and has relatively constant outflow. Limited water dynamics reduced the epilimnion thickness (from 4 to 2 m) and influenced the monimolimnion setting below 13 m depth with a characteristic small (0.2°C) temperature increase in the vertical profile and a permanent deoxygenation of the water below 7-11 m depth. The relationship between the organic matter parameters BOD; and COD-Mn before the shore collapse revealed the dominance of matter produced in the reservoir. In the final period the situation was opposite. In the monimolimnion allochthonous matter accumulated which due to anaerobic decomposition generated large amounts of ammonium. Observed in the same water layer was also a decrease of the conductivity.

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Authors and Affiliations

Renata Tandyrak

Mariusz Teodorowicz

Joanna Gorchowska

Balance and Circulation of Nutrients in a Shallow Coastal Lake Gardno (North Poland)

Jan Trojanowksi Czesława Trojanowska

Archives of Environmental Protection | 2007 | vol. 33 | No 1 | 45-57

Keywords nutrients sedimentation resuspension denitrification shallow lake

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Abstract

In 2002 the circulation of nutrients and their balance was studied in a large, shallow, eutrophic Lake Gardno. It was determined that throughout a year 1516 Mg of total nitrogen and 155 Mg of total phosphorus reach the lake. Approximately 67% of nitrogen and 87% of phosphorus reaching the lake flows out of it, the rest remains in the lake. About 45% of the total loss of nitrogen results from denitrification, and about 53% from sedimentation. The greatest effect on the circulation of nutrients in Lake Gardno is exerted by the mixing of water caused by strong winds resulting in the upward movement of the surface layers of bottom sediments. This causes increased resuspension and sedimentation, which mask similar processes resulting from the outer load of nutrients and from autochtonie processes and products, which are one or two orders ofa magnitude smaller.

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Authors and Affiliations

Jan Trojanowksi

Czesława Trojanowska

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