The paper present the detailed assessment of water retention possibility in the lakes situated in the Struga Dormowska River. These activities were important to increase satisfy water needs warranty of fish ponds. Struga Dormowska is the third rank river, the left tributary of the Warta River. The area of the catchment amounts 57.2 km2. The catchment has an agricul-ture-forest character and high lake density. Struga Dormowska flow through twelve lakes, which have an area of 240 ha. The area of each lake range from 2 to 79.6 ha. The catchment has a very small water resources. Specific runoff of the catchment equals about 2 dm3.s-1.km-2, and runoff coefficient about 0.1. The researches reveal that increase of lakes water retention allows to obtain high amount of disposal water, that allows to increase water needs of the fish ponds warranty satisfy located in the middle and lower part of the river. The estimation was based on amplitudes of water level in the lakes, elevation-storage curves and inventory of hydraulic structures along the river. Damming of the water in the seven lakes from 0.2 to 0.3 m in natural water level oscillations allows to gain about 0.4 mln m3 water in the usable ...
Witkowo commune is located in the eastern part of Wielkopolska region at Gniezno county. This is typical agricultural commune with some tourism infrastructure. The aim of the work was to evaluate of an existing tourism potential of Witkowo commune based on comparison analysis of indexes describing its tourism potential and other communes located in administration boundaries of the same county. For this purpose the multidimensional comparison analysis of synthetic measures was performed. Afterwards the concept of tourism potential enrichment was proposed based on aforementioned analysis. The obtained results revealed, that the highest synthetic measure was noted for Witkowo commune, where the highest tourism potential was observed. The lowest level was recorded for Niechanowo commune, which revealed the lowest values almost in every analysed group of indexes. The proposed tourist trail contributes to tourism enrichment potential of Witkowo commune. The trail goes through Powidzko-Bieniszewski Landscape Protected Area. This is in agreement to the goal of tourism management for the development of the tourism at a protected area with considering the protection rules and local features. Simultaneously the tourist trail designation does not disturb ecological balance and create consistent tourist infrastructure. ...
The aim of this research was an assessment of impact of relocated Mała Wełna river channel on water conditions in the adjacent areas. In this paper also a fasibility to increase river flow capacity with the purpose of maintaining river channel dynamic equilibrium was presented. Field observations and measurements were carried out in hydrological years of 2000–2008 in Mała Wełna river catchment down to Kiszkowo crosssection. The main cause of valley flooding on the reach from Zakrzewo to Kiszkowo were hydraulic conditions at the relocated Mała Wełna river channel. The river cross-section geometry and its channel slope caused that at the high-water discharge SWQ the channel capacity of the river is too low. A lack of the river banks and bottom maintenance has had strong negative impact on the river capacity. To improve the river flow capacity and the drain ditches “A” and “B” it is necessary to make modernization of hydraulic structures and the whole water system in the catchment of the Mała Wełna river. Before this it is necessary to make a detail geodetic measurement of these areas. ...
