Wielkopolska region has precipitation below country average and water shortage is especially visible during spring and summer, thus regeneration of water bodies play important role in saving of water reserves in rural areas. The newly built water reservoir is located in Nienawiszcz, Rogoźno commune, Poland. The aim of study was to compare experimental sites according to parameters describing water trophy like chlorophyll a, dry mass of seston, total organic carbon, biochemical oxygen demand and according to concentrations of nitrogen and phosphorus compounds. Sites were compared using location in reservoir and year season. In the year 2014 (after connection of both parts of lake) part A and B of reservoir had similar trophic conditions, thus confirming stabilisation of the reservoir as an initial freshwater ecosystem. Water table level was also stable, thus low average water depth was not affected water quality Based on canonical variates analysis it was showed, that changes of nitrates and total nitrogen concentrations strongly affected the variability of experimental objects in comparison to concentrations of nitrites and total phosphorus. In the year 2014, after connection of both parts A and B the reservoir start to stabilise in case of similarity of water quality parameters in surveyed sites.

Studies on landscape management and the role of waters in landscape is becoming a more appreciated and interesting direction of study around the world [1-3 and others]. It is also due to its meaning for issues related to protection of water reserves in rural areas and recognition of dynamics of biological processes in mature and initial water bodies [4, 5]. Small aquatic ecosystems are an important element protecting water resources and differentiating the structure of agricultural landscape. They were underestimated and often liquidated in the past, although they constitute a significant part of aquatic ecosystems in agricultural areas and perform various functions in nature [6-13]. The use of ponds located in agricultural landscapes for the retention of drainage water may lead to an increase in the amount of water resources [14]. Small water reservoirs, variable by nature, stimulate ecological richness and are very rich in terms of diversity of flora and fauna [7, 11, 12, 15-17]. Water reservoirs together with their perimeter are important environmental islands and elements of ecological connections in the agricultural landscape

According to regulations in some European countries, peat is treated as a fossil fuel or soil for mushroom horticulture and its management is subject to the law for mining activities. As a result of the exploitation of peat bogs, the cutaway or pit lakes remain, which when properly prepared can be local water resources. Such post-peat water bodies can be used for recreation and they can be particularly important in areas struggling with water deficiency in the rural landscape. Maintaining good water quality in such reservoirs requires a number of preparatory works, including the removal of the remaining organic matter that would rest at the bottom of the new pit lake, affecting the water quality. Studies of water quality and aquatic plant communities in the studied post-peat lake were carried out during the period 2012–2014 in order to determine the changes in water quality and the usefulness of water for cyprinids. Aquatic plant communities identified in the reservoir showed a simplified species composition, characteristic of initial communities, and they occupied small areas in the water and on the banks. It has been shown that water quality parameters of the studied water body were stable and corresponded to thresholds established for cyprinids.

According to historical sources, a watermill existed in the valley of the Trojanka River on the north-western shore of Raduszyn Lake from the 15th century. Its dams lasted for centuries causing the water flow through the Raduszyn reservoir to slow down and deposit various mineral fractions in it. The aim of paper was to develop a scientific background for the sustainable management of organic matter extracted from the peat top and from deeper layers that are unsuitable for direct use, that is, decomposed peat. A SWOT (strengths, weaknesses, opportunities, threats) analysis was used to describe ways of restoration of the water reservoir alongside the characterization of organic matter and the financial condition of the studied enterprise. For the use of the studied material as a homogeneous substrate for plant cultivation, the contents of nitrogen, phosphorus, potassium, and copper were insufficient, whilst calcium was excessive. Microbiological analyses of the organic materials intended as an additive for horticultural substrates confirmed the presence of plant growth-promoting bacteria. The occurrence of such microorganisms in the substrate can limit the use of mineral fertilizers and chemical plant protection products. The results of the research can be an example for enterprises restoring or creating water reservoirs by extraction of organic matter, which is often considered as waste that generates costs and does not bring financial benefits. Such a measure can be used to improve the efficiency of water reservoir restoration enterprises and at the same time contribute to sustainable land development.

powierzchniowe należą do komponentów środowiska, które w znacznym stopniu zwiększają atrakcyjność krajobrazu. Z tego powodu uwzględnia się je w większości metod jego oceny. W wyniku procesów naturalnych oraz długotrwałej intensyfikacji rolnictwa i zagospodarowania terenu wiele zbiorników uległo degradacji albo nawet zanikło. Z uwagi na wzrost znaczenia ochrony walorów przyrodniczych w krajobrazie rolniczym wskazana jest ich rewitalizacja przez odtwarzanie lub budowę małych zbiorników wodnych. Materiał i metody. W pracy przedstawiono ocenę wpływu odtworzonych zbiorników wodnych oraz wprowadzonych zadrzewień na walory wizualne krajobrazu rolniczego. Obiektem badań był obszar nieruchomości położonej w okolicy wsi Nienawiszcz (gmina Rogoźno w Wielkopolsce), na którym w latach 1999-2012 inwestor wybudował trzy zbiorniki wodne oraz zrealizował działania wzbogacające krajobraz. Ocenę wizualną krajobrazu wykonano w 2014 roku metodą krzywej wrażeń Wejcherta, zaadaptowaną do krajobrazu niezurbanizowanego. Wyniki. Przeprowadzone badania wykazały, że na analizowanym obszarze krajobraz jest zróżnicowany i atrakcyjny wizualnie. Odtworzenie zbiorników wodnych w Nienawiszczu dodatkowo wpłynęło na urozmaicenie krajobrazu rolniczego oraz podwyższenie jego oceny wizualnej zarówno w porze letniej, jak i zimowej. Wnioski. Odbudowa zbiorników wodnych oraz szerokie działania krajobrazowe wpłynęły na zwiększenie atrakcyjności krajobrazu rolniczego, zwłaszcza pod kątem rekreacji i turystyki.