Autor: Tandyrak, J - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Rekultywacja trzech jezior w Olsztynie w kontekście rozwoju przestrzeni rekreacyjnej miasta
Restoration of the three lakes in Olsztyn, in the context of the development of recreational area city
Autorzy:: Parszuto, K.
Tandyrak, R.
Grochowska, J.
Sienska, J.
Powiązania:: https://bibliotekanauki.pl/articles/2077907.pdf
Data publikacji:: 2018
Wydawca:: Uniwersytet Warszawski. Wydział Geografii i Studiów Regionalnych
Źródło:: Prace i Studia Geograficzne; 2018, 63, 4; 129-144
0208-4589
Pojawia się w:: Prace i Studia Geograficzne
Dostawca treści:: Biblioteka Nauki

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Tytuł:: Modifications in the trophic state of an urban lake, restored by different methods
Autorzy:: Grochowska, J.
Brzozowska, R.
Parszuto, K.
Tandyrak, R.
Powiązania:: https://bibliotekanauki.pl/articles/960185.pdf
Data publikacji:: 2017
Wydawca:: Uniwersytet Warmińsko-Mazurski w Olsztynie / Polskie Towarzystwo Magnezologiczne im. Prof. Juliana Aleksandrowicza
Opis:: The rapid acceleration of eutrophication calls for effective methods to reverse or at least decelerate this process and its consequences, such as phytoplankton blooms, deterioration of water transparency, loss of oxygen balance as well as nitrogen and phosphorus internal loading from bottom sediments. Many different restoration methods have already implemented in order to improve the quality of lake water in Poland and around the world. Science reports on lake restoration mostly present short-term results achieved with one method, sometimes with a combination of few technologies, methods. Noteworthy is the scarcity of longitudinal observations and descriptions of persisting changes in environmental conditions and trophic status after a lake restoration process. The aim of the study was to present long-term changes in the trophic status of an urban lake which were been achieved through artificial aeration with thermal destratification and phosphorus inactivation, based on water quality parameters and an analysis of biotic and abiotic conditions prevailing in this lake. The study was conducted on Długie Lake, situated in the town of Olsztyn. This lake had acted as a sink of raw domestic sewage (400 m3 day-1) for 20 years. After preliminary conservation operations, the lake was restored by the artificial circulation and phosphorus inactivation methods. Prior to the restoration effort, the lake had been classified as hypertrophic, with an average TSI index value of 79. The average chlorophyll a concentration was 63 μg l-1 and water transparency did not exceed 0.3 m. The implementation of two restoration methods improved the trophic level and the lake became mesotrophic. The improvement seems permanent, as the mean TSI index is 50 ten years since the termination of the restoration procedures.
Źródło:: Journal of Elementology; 2017, 22, 1
1644-2296
Pojawia się w:: Journal of Elementology
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Bottom Deposits of Stratified, Seepage, Urban Lake (On the Example of Tyrsko Lake, Poland) as a Factor Potentially Shaping Lake Water Quality
Autorzy:: Augustyniak, R.
Neugebauer, M.
Kowalska, J.
Szymański, D.
Wiśniewski, G.
Filipkowska, Z.
Grochowska, J.
Łopata, M.
Parszuto, K.
Tandyrak, R.
Powiązania:: https://bibliotekanauki.pl/articles/125198.pdf
Data publikacji:: 2017
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: urban lake
phosphorus
bottom sediment
internal loading
Opis:: 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.
Źródło:: Journal of Ecological Engineering; 2017, 18, 5; 55-62
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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