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1

The hydrodynamical model of sedimentation process of suspended load in storage reservoir

100%
Nachlik E., Kowalska W., Prystaj A.
Zeszyty Naukowe Akademii Rolniczej we Wrocławiu. Melioracja
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1988
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nr 31
2
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The role of storage reservoirs in reducing calcium migration from agricultural catchments

86%
Koc J., Duda M.
Journal of Elementology
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2009
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tom 14
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nr 3
467-476
This study was conducted on a storage reservoir situated in a valley, in the lower course of the Sząbruk stream in north-eastern Poland, the Olsztyn Lakeland mesoregion. The catchment area of the Sząbruk stream consists of an agricultural and an afforested part. A storage reservoir is found in the lower part of the Sząbruk stream valley. The reservoir was built 25 years ago. It is enclosed by a dike and equipped with an outlet box. Outflows from the reservoir pass through the terminal segment of the Sząbruk stream to Lake Wulpińskie. The results of the experiment indicate that the calcium content of water evacuated from the catchment was determined by the type and intensity of catchment use, ranging from 22.3 mg Ca⋅dm-3 to 178 mg Ca⋅dm-3. The highest calcium concentrations, 113 mg Ca⋅dm-3 on average, were noted in the agricultural catchment connected to a drainage network; lower levels, 78.7 mg Ca⋅dm-3, were found in farming areas drained via ditches, while the lowest Ca content in water, 38.7 mg Ca⋅dm-3 on average, was determined in outflows from afforested catchments. Calcium concentrations were lower during the growing season in all studied catchment types. The calcium load discharged from the catchment dependnded on the catchment management. The highest calcium loss per area unit was observed in the drained agricultural catchment (76.6 kg Ca⋅ha-1⋅year-1), followed by the catchment drained via ditches (56.3 Ca⋅ha-1⋅year-1) and the afforested catchment (31.8 Ca⋅ha-1⋅year-1). Despite the inflow of calcium-rich drainage water, calcium concentrations decreased by 11%, from 56.8 mg Ca⋅dm-3 to 50.3 mg Ca⋅dm-3, after the stream’s waters passed through the storage reservoir. An increase in Ca levels was noted in the girdling ditch. The flow of water through the ditch minimizes sedimentation, and higher quantities of Ca were supplied with drainage water. The reservoir accumulated 242.4 kg Ca per ha in the course of one year, mostly in the growing season (83%). The above indicates high involvement of biological processes. The reservoir fulfilled the role of a barrier inhibiting calcium loss from the catchment.
3
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Application of geodetic methods for monitoring of stresses of penstock on Tereblya-Rikska hydropower station

72%
Tretyak K., Grytsyuk T., Dvulit P., Babiy L.
Infrastruktura i Ekologia Terenów Wiejskich
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2010
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nr 11
The long-term dependences for the changes of deformations and stresses in penstock based on the results of many-year investigations are established. Such investigations were held on the spatial geodetic network on the Tereblya-Rikska hydropower station (HPS). The investigations of the short-term stresses and deformations of the penstock with the use of electronic tachеometer Leica TPS 1201 has been undertaken. Direct correlations between the changes of the length of all baulks and the changes of water level in the storage reservoir are determined
4
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Sklad granulometryczny osadow dennych zbiornika wod zrzutowych Zakladow Azotowych Pulawy

58%
Ligeza S., Smal H.
Acta Agrophysica
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2003
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tom 01
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nr 2[87]
271-277
5
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The silting influence on the capacity of the Krzywaniec reservoir

58%
Mokwa M., Malczewska B.
Annals of Warsaw University of Life Sciences - SGGW. Land Reclamation
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2008
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tom 39
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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