Wyniki wyszukiwania - Biblioteka Nauki

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Multi-year investigations of organic matter in the waters of Lake Starodworskie, after phosphorus inactivation

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Tandyrak R. , Parszuto K.

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tom Vol. 32, no. 3

29-40

EN

The investigations regarded a small (6 ha) but deep (23.3 m) Lake Starodworskie, located in Olsztyn. In 1994 and 1995 the lake experienced a two-phase phosphorus inactivation with aluminium sulphate. The favorable effects of the treatment were observed for approximately three years. The examinations of 1997-2004 revealed a tendency to increase all observed indexes of organic matter. The surface water was dominated by the allochthonous matter (biochemical oxygen demand (BOD)/chcmical oxygen demand (CODMn) - 0.5) and the conditions were favorable for bluc-grccn algae blooms (low N/P ratio). The correlations between dissolved organic carbon (DOC) and CODMn, alike between particulatc organic carbon (POC) and CODMn, were significant (r = 0.696 and r = 0.637,"respectively, p < 0.01). The correlations between BOD and chlorophyll a content (r = 0.4317, p < 0.05), POC and chlorophyll a, and BOD and DOC (r = 0.4622, r = 0.5100, r = 0.5000, respectively, p < 0.01) indicate that not only the phytoplankton was a source of organic matter in the surface water layer of Lake Starodworskic but that an important role was played also by primary production and the rate as well as direction of the dead organic matter transformations. Concentrations of BOD, CODMn, and organic phosphorus increased along with the depth which was especially evident in the water below 15 m. Simultaneously, due to the anaerobic conditions, organic nitrogen was low or close to zero. The study also revealed that the ratio between POC and DOC increased, especially at 1 m and 5 m depths, and that deeper down the increase was smaller.

PL

Obserwacje prowadzono na niewielkim (6 ha), lecz głębokim (23,3 m) Jeziorze Starodworskim w Olsztynie. W latach 1994 i 1995, w dwóch etapach, przeprowadzono zabieg inaktywacji fosforu w użyciem siarczanu glinu. Po około trzyletnim okresie utrzymywania się korzystnych zmian wywołanych tym działaniem, badania przeprowadzone w latach 1997-2004 wykazały tendencję wzrostową zawartości wszystkich analizowanych wskaźników materii organicznej. W powierzchniowej warstwie wód dominowała materia allochtoniczna (BOD/CODMo ok. 0,5) i istniały sprzyjające warunki do rozwoju zakwitów sinicowych (niski stosunek N/P). Stwierdzono wysoce istotne korelacje DOC i CODMn oraz POC i CODMo (odpowiednio: r = 0,696, r = 0,637, p < 0,01). Korelacje między BOD i chlorofilem a (r = 0,4317, p < 0,0°5) oraz między POC a stężeniem chlorofilu a, BOD i DOC (odpowiednio: r = 0,4622, r = 0,5100, r = 0,5000, p < 0,01) sugerują, że źródłem materii organicznej w powierzchniowej warstwie wód jeziora Starodworskicgo był nie tylko fitoplankton, ale ważną rolę odgrywała również produkcja wtórna oraz tempo i kierunek przemian martwej materii organicznej. Stężenia BOD, CODMn i fosforu organicznego wzrastały wraz z głębokością, co było szczególnie widoczne w wodach poniżej 15 m. Jednocześnie stwierdzano niewielką, bądź zerową ilość azotu organicznego, o czym decydowały występujące tam warunki beztlenowe. W okresie badawczym zaobserwowano wzrost udziału POC w stosunku do DOC - wyraźnie zaznaczony na głębokości 1 i 5 m oraz bardziej łagodny w głębszych partiach wód jeziora.

2

Hydrochemical properties, bacterioplankton abundance and biomass in the meromictic Lake Starodworskie in 2004

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Tandyrak R. , Parszuto K. , Górniak D. , Kośnik P.

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2009

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tom Vol. 38, No.4

127-133

EN

Physicochemical and microbiological examinations were conducted on the meromictic Lake Starodworskie located in Olsztyn. The temperature profile revealed a characteristic, small increase in temperature at a depth between 13 and 14 m, and permanent anaerobic conditions in the deeper water layers. Accumulation of dissolved mineral substances enhanced the thermal stability of the lake waters; electrolytic conductivity values in the water deeper than 15 m oscillated within the range of 533 - 568 μS cm^-1.

3

Rekultywacja trzech jezior w Olsztynie w kontekście rozwoju przestrzeni rekreacyjnej miasta

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Parszuto K. , Tandyrak R. , Grochowska J. , Sienska J.

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nr 4

4

From restoration to revitalization: how to recover recreational values of urban lakes. A case study of lake Domowe Duze in Szczytno

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Lopata M. , Wisniewski G. , Parszuto K. , Dunalska J.

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tom 31

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nr 3

EN

Lake Domowe Duże (surface area 54 ha, maximum depth 7.2 m) is one of the two lakes lying in the town limits of Szczytno. For years, despite its large recreational potential, the lake had beenrarely exploited by town residents or visitors due to its classless water quality. The restoration project initiated in 2010 has raised interest in spending leisure time on this lake. The natural conditions affecting the lake’s waterfront have been analyzed, as well as the impact of the lake’s morphometric properties and the land management along the shoreline on a possible use of the lake for recreation, including angling.The results suggest that owing to its large size and morphometric diversity, as well as the recently developed infrastructure for the tourism industry, Lake Domowe Duże can serve various forms of recreation. The improvement of the lake’s water quality achieved in recent years has created opportunities for water recreational activities and enhanced the angling quality of this water body

PL

Jezioro Domowe Duże (powierzchnia 54 ha, głębokość maksymalna 7,2 m) jest jednym z dwóch akwenów miejskich Szczytna. Mimo znacznego potencjału do rekreacyjnego wykorzystania, zbiornik ten, z uwagi na pozaklasową jakość wód, w niewielkim stopniu służył mieszkańcom i turystom. Zainicjowana w 2010 r. rekultywacja jeziora spowodowała wzrost zainteresowania aktywnym wypoczynkiem nad badanym akwenem.W pracy przeanalizowano istniejące uwarunkowania przyrodnicze kształtowania przestrzeni przywodnej jeziora oraz wpływ cech morfometrycznych zbiornika i sposobu zagospodarowania linii brzegowej na możliwość wykorzystania rekreacyjnego, w tym do uprawiania wędkarstwa. Uzyskane wyniki wskazują, że dzięki swej wielkości i zróżnicowaniu morfometrycznemu, a także powstaniu nowych elementów infrastrukturalnych, bazy turystycznej, Jezioro Domowe Duże może być wykorzystywane do różnorodnych form rekreacji. Uzyskana w ostatnich latach poprawa jakości wody stwarza dogodne warunki do rekreacji nawodnej, jak również pozytywnie wpływa na atrakcyjność wędkarską akwenu

5

Water quality of Lake Elk as a factor connected with tourism, leisure and recreation on an urban area

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Tandyrak R. , Parszuto K. , Grochowska J.

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nr 3

EN

Lake Ełk as an important element of the urban landscape is associated with tourism and active recreation and because of it with the economy of the town. Since 1999 the renovation method with the use of artificial aeration with simultaneous phosphorus inactivation and also as a biological filter – BIO-HYDRO structures were applied on the lake. This process was lasting 10 years and brought only a short-term improvement. At the same time, the shores of the lake were managed to develop of lake tourism: beach, swimming pool, tennis courts, a promenade, and two a water equipment rentals. The illuminated fountain, the road bridge and well – developed catering – accommodation base were made as well.

6

The influence of different recultivation techniques on primary production processes in a degraded urban lake

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Grochowska J. , Brzozowska R. , Parszuto K.

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tom Vol. 43, No. 3

211--218

EN

The study was conducted in Lake Długie located in Olsztyn, the Masurian Lake District. In the 1950s and in the 1960s, Lake Długie was used for 20 years as a collector of raw domestic and storm sewage. This has led to complete degradation of the lake. After preliminary protection measures implemented in the catchment, the lake was restored by artificial aeration and phosphorus inactivation methods. Long-term recultivation of the reservoir resulted in a significant and long-lasting improvement of the water quality. Before restoration, the average concentration of organic phosphorus in the surface water layer amounted to 0.166 mg Porg l-1 and of organic nitrogen − to 3.0 mg Norg l-1. After restoration, these values decreased to 0.058 mg Porg l-1 and 2.0 mg Norg l-1. The results obtained eight years after the recultivation of Lake Długie are extremely interesting. The amounts of chlorophyll a did not exceed 7 μg l-1, water transparency remained at a depth of 2.9 m, and BOD5 did not exceed 2 mg O2 l-1. These observations show that during implementation of recultivation treatments, only chemical parameters of the water significantly changed, while biological elements reacted to the treatments with some delay.

7

Hydrochemical properties, bacterioplankton abundance and biomass in the meromictic Lake Starodworskie in 2004

80%

Tandyrak R. , Parszuto K. , Gorniak D. , Kosnik P.

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nr 4

127-133

8

Development of Drweckie Lake in Ostroda for tourist and recreational purposes, and its impact on the burden to the natural environment in the shoreline zone

61%

Parszuto K. , Tandyrak R. , Lopata M. , Mikulewicz S. , Grochowska J. , Dunalska J.

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nr 1

EN

Our analysis deals with the land development and management for tourist and recreational purposes around Drwęckie Lake, a water body lying in the limits of the town Ostróda. A lot of tourists and residents in summer season can be attributed to the spatial management, a wide range of hospitality facilities and many opportunities to practice water sports and to hold mass events. Another aspect we analyzed was the influence that these various forms of development for tourism and recreation could have on the natural environment of Drwęckie Lake. To this aim, the shoreline burden indicator (K) values and the lake’s burden class were calculated. It has been concluded that both land and water shore zones are considerably loaded due to the densely developed space and increasingly intensive tourist and recreational activities. Current situation can lead to excessive degradation of the lake’s water and depreciation of the tourist value of the entire area.

PL

Przeanalizowano zagospodarowanie turystyczno-rekreacyjne Jeziora Drwęckiego w Ostródzie. Sposób zagospodarowania, bogata oferta gastronomiczna i noclegowa oraz atrakcje związane z możliwością uprawiania sportów wodnych i organizowania imprez masowych przyciągają w sezonie letnim wielu turystów i mieszkańców miasta. Zbadano także wpływ form użytkowania turystyczno-rekreacyjnego na środowisko przyrodnicze Jeziora Drwęckiego, wyznaczając wskaźniki stopnia obciążenia strefy brzegowej (K) oraz klasy obciążenia jeziora. Stwierdzono, że obydwie strefy – lądowa oraz wodna – są w znacznym stopniu obciążone z powodu intensywnego zagospodarowania przestrzeni oraz intensyfikację różnorodnych form użytkowania turystycznego i rekreacyjnego. Może to być przyczyną nadmiernej presji antropogenicznej i wpływać negatywnie na przeobrażanie obszarów zlokalizowanych wokół Jeziora Drwęckiego. Obecna sytuacja może doprowadzić do nadmiernej degradacji wód jeziora i w efekcie obniżyć walory turystyczne tego obszaru.

9

Bottom Deposits of Stratified, Seepage, Urban Lake (On the Example of Tyrsko Lake, Poland) as a Factor Potentially Shaping Lake Water Quality

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Augustyniak R. , Neugebauer M. , Kowalska J. , Szymański D. , Wiśniewski G. , Filipkowska Z. , Grochowska J. , Łopata M. , Parszuto K. , Tandyrak R.

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tom Vol. 18, nr 5

55--62

EN

The object of the study was Tyrsko Lake (area 18.6 ha, max. depth 30.4 m), located in the western part of Olsztyn (Olsztyn Lakeland). This lake is one of the clear water lakes in Olsztyn, but the progressive deterioration of water quality has been observed during recent years. The phosphorus concentration in the water-sediment interface, phosphorus fractions quantity and the amount of components which can bind this element was investigated in the upper (0–5 cm) layer of deposits. The aim of study was to analyze the potential influence of bottom sediment on the lake water quality. The obtained results revealed that the bottom sediment of Tyrsko Lake can be classified as mixed, silica-organic type, with a relatively high content of iron (over 4% Fe in d.w.). The total phosphorus content was ca. 3.5 mg P g,-1 d.w. on average. Phosphorus in the bottom sediment was bound mainly with organic matter (NaOH-nrP fraction), which had over 50% share in TP. Highly mobile fractions (NH4-Cl-P and BD-P) together only included ca. 5% to 7% TP. The obtained results show that the bottom sediment of Tyrsko Lake can bind phosphorus quite effectively. The calculated internal mineral phosphorus loading during summer stagnation period was 10.9 kg and it was lower that the assessed annual external phosphorus load (22.6 kg). The assessed annual phosphorus loading from both sources was still lower than the critical load according to Vollenweider criteria. However, due to the fact that the internal loading phenomenon is occurring in the lake, it should be taken into consideration that the lake water quality can deteriorate gradually during the longer time perspective. These findings should be accounted for in the future if the potential protection and restoration procedures will be developed.