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Michalczyk Z.,Zaklad Hydrologii UMCS | Bartoszewski S.,Zaklad Hydrologii UMCS | Glowacki S.,Zaklad Hydrologii UMCS | Sposob J.,Zaklad Hydrologii UMCS
Annales Universitatis Mariae Curie-Sklodowska. Sectio B | Year: 2011

This paper is focused on an analysis of conditions of groundwaters occurrence in the Czerniejówka river basin. The paper also presents the outflow rate from the upper and middle course of the river, where the natural environment is only slightly influenced by human activity. The lower part of the catchment is under city impact, intensified since 1954, when the water intake Dziesia̧ta has started exploitation of groundwater resources. The middle part of the catchment is influenced by exploitation of water resources in the water intake Wilczopole, since 1988. Ten-year (1979-1988) water gauge observations and discharge measurement and water levels in the upper and middle part of the catchment, in the period of documentation of water resources of the water intake Wilczopole, are the basis of analysis.The Czerniejówka river basin is under strong and diversified human impact. Two water intakes constructed in the catchment of the river assure the water for 40% of the city demand. Hydrogeological conditions, fissured rocks and low elevation of the water division, determine the possibilities of underground water flow from the left part of the catchment to the Bystrzyca river basin, which significantly influences the reduced water resources of the Czerniejówka river. Good permeability of rocks is favourable for retention of water that steadily inflows to the river channel. Surface runoff occurs sporadically, usually in the frozen ground period rather than in the summer, which determines the high share of the ground feeding in total runoff. Average specific runoff for the upper and middle part of the basin was estimated as 4.2 dm3·s -1·km-2 in the ten-year period. At present conditions of catchment land use and exploitation of Dziesia̧ta and Wilczopole water intakes, the Czerniejówka river discharge will decrease with the only feeding from the upper part of the catchment. In dry periods, in the middle and lower course of the Czerniejówka river infiltration of river water to underground resources, as well as in the Skrzyniczanka river, will take place.

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