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Type of publication: Straipsnis konferencijos medžiagoje Clarivate Analytics Web of Science ar/ir Scopus / Article in Clarivate Analytics Web of Science or Scopus DB conference proceedings (P1a)
Field of Science: Aplinkos inžinerija / Environmental engineering (T004)
Author(s): Vaikasas, Saulius;Rimkus, Alfonsas
Title: Modelling the impact of small hydropower dam on sediment retention in the river Virvyte
Is part of: Environmental engineering : the 8th international conference, May 19-20, 2011, Vilnius, Lihtuania: selected papers. Vol. 2 : Water engineering. Energy for buildings. Vilnius : Technika, 2011
Extent: p. 698-703
Date: 2011
Keywords: Hydraulic modeling;HPP ponds;Sedimentation in grass
ISBN: 9789955288282
Abstract: The hydroelectric power plants (HPP) are a valuable source of renewable energy; however they negatively impact the environmental conditions in the river. The paper presents investigation of the ways to coordinate these problems. The mathematical-hydraulic modeling is used to investigate sedimentation process in the riverbed and in the flooded valley. The sedimentation and sediment retention in the valleys is more intensive, when the HPP dams are not high (H £ 4 m) and their ponds do not overflow into floodplains. The great sediment retention was estimated during the 1 % probability flood of 1958 (8000t/year) in the investigated interval of the river Virvyte. Having arranged 3 ponds in this reach, sediment retention decreased by about 50 %, as the height of Kap÷nai HPP dam was too big. The sedimentation during the years of various water heights in this river interval has been 500-2000 t/year, i.e. quite heavy. Grass in the flooded meadows entrap the sediments and decrease the water contamination below dam
Affiliation(s): Vilniaus Gedimino technikos universitetas
Vytauto Didžiojo universitetas
Žemės ūkio akademija
Appears in Collections:Universiteto mokslo publikacijos / University Research Publications

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