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Petr Doležal, Jana Konečná, Petr Karásek, Jana Podhrázská and Michal Pochop

charakteristiky teoretických návrhových povodňových vln. In Sborník prací Českého hydrometeorologického ústavu, 54. [20] Williamson, C. E., Saros, J. E., Vincent, W. F. & Smop, J. P. (2009). Lakes and reservoirs as sentinels, integrators and regulators of climate change. Limnology and Oceanography 54(6), 2273–222. DOI: 10.4319/lo.2009.54.6_part_2.2273. [21] Zhao, G. et al. (2013). Soil erosion, conservation and ecoenvironment changes in the loess plateau of China. Land Degradation and Development , 24(5), 499–510. DOI: 10.1002/ldr.2246. [22] Zubala, T

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Mirosław Wiatkowski, Czesława Rosik-Dulewska, Daria Nikel and Urszula Karwaczyńska

REFERENCES BEDLA D., MISZTAL A. 2014: Changeability of Chemistry of Small Water Reservoirs with Diversified Use Structure of the Adjoining Areas. Rocz. Ochr. Środ. 16: 421–439. Retrieved from http://towarzystwo.ros.edu.pl/images/roczniki/2014/pp_2014_01_27.pdf . BIELECKA J. 2006: Oczka wodne. [in:] W. Mioduszewski (Ed.). Woda w krajobrazie rolniczym. Wydawnictwo Instytutu Melioracji i Użytków Zielonych, Falenty, 89–107. CIEPIELOWSKI A. 2001: Kształtowanie retencji wodnej w lasach. Wydawnictwo Instytutu Melioracji i Użytków Zielonych, Falenty

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Waldemar Mioduszewski

. John Wiley. ISBN 978-0471107200 pp. 288. CZAMARA W., WIATKOWSKI M. 2002. Ochrona małych zbiorników przed zanieczyszczeniami antropogenicznymi [Protection of constructed wetlands against anthropogenic pollution]. Prace Instytutu Geografii Akademii Świętokrzyskiej. Nr 7 p. 67-72. DOLL B. 1996. Engineered stormwater controls. Water quality and management [online]. [Access 08.08.2012]. Available at: www.bae.ncsu.edu/ programs. GUZIUR J., WOŹNIAK M. 2006. Produkcja ryb w małych zbiornikach [Fish farming in small reservoirs

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Wojciech Wiesner and Bogusław Kowalewski

Abstract

Within the administrative boundaries of Olsztyn, there are 16 lakes and several artificial swimming facilities. They provide attractive conditions for water recreation and water sports. But are these conditions completely safe?

The aim of the study is to get familiar with the safety conditions of water reservoirs in Olsztyn in terms of opportunities for water recreation. In order to solve the addressed problem, the analysis of source materials has been performed, the field research has been conducted and the survey has been applied.

The outcome of the research includes the description of the recreational value of these water reservoirs, the identification of potential threats (internal and external) and the evaluation of logistic and emergency protection.

Open access

Marian Mokwa and Beata Malczewska

The silting influence on the capacity of the Krzywaniec reservoir

The Krzywaniec reservoir is a part of Dychów complex hydraulic engineering, and it was created as a damming up water of the Bóbr river in 42+700 km to wave elevation 73.30 NN. The river valley was divided by three span gate weir and tide gate to derivation channel to ESP Dychów. The Krzywaniec reservoir is currently silted up so that the probable water surface Q1% is going to reach reservoir site embankment which means it poses the flood risk on surrounding area. The authors present restoring the initial situation on Krzywaniec reservoir, and estimated the reduction of flood depending on method of declogging the reservoir using computer simulation performed in HEC-RAS.

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Jana Urminská, Peter Ondrišík and Renáta Prokeinová

between river and lake sediments. In: Water, Air & Soil Pollution, vol. 161, 2005, no. 1-4, pp. 209-225. HILLER, E. - JURKOVIČ, Ľ. - ŠUTRIEPKA, M. 2010. Metals in the surface sediments of selected water reservoirs, Slovakia. In: Bulletin of Enironmental Contamination and Toxicology, 84, 2010, pp. 635-640. ISSN 0007-4861. KISHE, M. A. - MACHIWA, J. F. 2003. Distribution of heavy metals in sediments of Mwanza Gulf of Lake Victoria, Tanzania. In: Environment International, vol. 28, 2003, no. 7, p. 619. KRÁLOVEC, J. - SLAVÍK

Open access

M. K. Patsyuk

-170. Patsyuk, M. K. 2010. Naked Lobose Amoeba (Lobosea, Gymnamoebia) of Some Reservoirs of Fence Surrounding Villages of Radomishl’. Scientifi c Notes of Ternopyl’ National Pedagogical University. Ser. Biology, 2 (43), 390−395 [In Ukrainian]. Patsyuk, M. K. 2011 a. Biotopic Allocation of Naked Amoebas in the Waters of Ukrainian Polessje. IV International Symposium «Ecology of Free-Living Protists in Terrestrial and Aquatic Ecosystems: Book of Abstracts » (October 17−21, 2011, Togliatty, Russia), 53 [In Russian]. Patsyuk, M. K. 2011 b. The

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Barbara Wojtasik and Justyna Cieszyńska

Meiobenthic assemblages, particularly Copepoda-Cyclopoida in the Czorsztyński and Sromowiecki reservoirs (the Pieniny Mountains, Poland)

There are located two reservoir dams: Czorsztyński and Sromowiecki between Dąbki and Sromowce Niżne. They were created in the 90's of the 20th century as a result of construction of a water power station in Niedzica. The purpose of this research was to determine the scale of the diversification of meiobenthos inhabiting littoral. It was based on the analysis of the higher rank taxons as well as on the analysis of the group of Copepoda-Cyclopoida. The research was carried out on the samples collected in July 2007. In the analysed material, there were observed 11 systematic groups characteristic of meiobenthos. The lowest density of meiobenthos was on the stations placed in the Czorsztyński reservoir, near the dam, where the base was formed from limestones and lots of sedimentary mud. In the analysis 12 species of Cyclopoida were recorded, the 11 species that were found are new for the fauna of the Pieniny Mts.

Open access

Marta Bedryj, Grzegorz Dumieński and Andrzej Tiukało

Abstract

There is a potential threat to lakes and water reservoirs from contamination released due to the flooding of objects that can pose an environmental risk (cemeteries, sewage treatment plants, sewage pumping stations, landfills and industrial plants) located in areas prone to inundation. The analysis covered large lakes and reservoirs (those with the area of over 50 ha), identified as bodies of surface water located in areas potentially affected by flooding of high (10%), medium (1%) and low (0.2%) probability of occurrence. These areas are presented on flood hazard maps and flood risk maps. The results of analyses revealed that the scale of potential threat to Polish lakes, defined as bodies of surface water, with contamination from objects of environmental flood risk is marginal, however, in the case of reservoirs – significant.

Open access

Edyta Sierka, Tadeusz Molenda and Damian Chmura

Environmental repercussion of subsidence reservoirs reclamation

Subsidence basins filled with water are being formed above exploitation fields also in woodland areas leading to changes in water relations simultaneously affecting creation of environmental islands characterized by higher biodiversity in comparison with adjacent areas.

Unfortunately, these types of water reservoirs from the legal point of view are considered mining damage and should thus be reclaimed. Reclamation usually consists in gravitational drainage and filling up with barren rock, appropriate relief forming and afforestation. So performed reclamation practices lead to negative effects both within the subsidence and in adjacent areas. The objective of this work was to determine the impact of reclamation based on filling subsidence with barren rock on changes in hydrology and biodiversity of nearby forest communities. For the purpose of the study two objects were selected: the existing water body and former water reservoir - at present filled with barren rock. Both are situated in Ślαskie voivodship (the territory of Mysłowice and Katowice). Within the two objects, hydrological studies at two sampling points in each of the objects and vegetation sampling were performed. The DCA of 12 transects (6 in each object) and statistical analyses of vegetation showed differences between two objects in species composition, especially due to higher abundance and coverage of invasive and expansive species in reclaimed areas. Chemical analyses showed high contamination of surface waters (by e.g. SO4 2-, Cl-, Na+) caused by waste deposition in barren rock and the negative effect of coal mine waters supplying the area of reclaimed reservoir.