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vol. 5, nr. 1 (2005)
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Possibility of surface run-off retention on an example of selected loess micro-basin
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Tomasz Zubala
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Department for Land Reclamation and Agricultural Structures, University of Agriculture ul. Leszczyńskiego 7, 20-069 Lublin |
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vol. 5 (2005), nr. 1,
pp. 219-228
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abstract:
The aim of the paper is to assess the possibility and needs of water retention in a periodical reservoir localized in the Nałęczów Płaskowyż area about 10 km from Lublin. The reservoir was formed as a result of partitioning a small dry slope valley with a road embankment with culvert. Its basin (about 150 ha) is totally covered with agricultural areas. The studies were carried out in 2000-2003. Apart from analysis of the land management structure and the basic basin parameters of the reservoir, also its capacity was determined and systematic measurements of water surface level and ground water level near the reservoir were performed. Measurements of atmospheric precipitation were also made during the study. The studies revealed that water surface levels in the reservoir depended on surface supplies (mainly during thaw and rainfall), and on ground water supply over a longer period. The capacity of retained water was 2600 m3, on average during study (with maximum of 4400 m3). A complete lack of water in the reservoir was observed in the second half of 2003 (a year extremely poor in rainfalls). The phenomenon was preceded by a significant decrease of ground water level in its neighbourhood – even by 170 cm in relation to the highest one. Besides positive influence on water balance in the micro-basin, the studied reservoir plays also managing functions (irrigation, drinking water for animals). However, due to its small capacity and astaticity, it should not be considered as one of the major water sources.
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keywords:
water reservoir, retention, agricultural catchment
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original in:
Polish
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