Please use this identifier to cite or link to this item:https://hdl.handle.net/20.500.12259/88560
Type of publication: Straipsnis Clarivate Analytics Web of Science ar/ir Scopus / Article in Clarivate Analytics Web of Science or / and Scopus (S1)
Field of Science: Statybos inžinerija / Civil engineering (T002);Aplinkos inžinerija / Environmental engineering (T004)
Author(s): Punys, Petras;Dumbrauskas, Antanas;Kasiulis, Egidijus;Vyčienė, Gitana;Šilinis, Linas
Title: Flow regime Changes: From Impounding a Temperate Lowland River to Small Hydropower Operations
Is part of: Energies. Basel: Molecular Diversity Preservation International (MDPI)., 2015, Vol. 8, Iss. 7
Extent: p. 7478-7501
Date: 2015
Keywords: Small hydropower;Small reservoirs;Natural and altered flow regime;Hydrograph ramping;Hydro turbines
Abstract: This article discusses the environmental issues facing small hydropower plants (SHPs) operating in temperate lowland rivers of Lithuania. The research subjects are two medium head reservoir type hydro schemes considered within a context of the global fleet of SHPs in the country. This research considers general abiotic indicators (flow, level, water retention time in the reservoirs) of the stream that may affect the aquatic systems. The main idea was to test whether the hydrologic regime has been altered by small hydropower dams. The analysis of changes in abiotic indicators is a complex process, including both pre- and post-reservoir construction and post commissioning of the SHPs under operation. Downstream hydrograph (flow and stage) ramping is also an issue for operating SHPs that can result in temporary rapid changes in flow and consequently negatively impact aquatic resources. This ramping has been quantitatively evaluated. To avoid the risk of excessive flow ramping, the types of turbines available were evaluated and the most suitable types for the natural river flow regime were identified. The results of this study are to allow for new hydro schemes or upgrades to use water resources in a more sustainable way
Internet: http://www.mdpi.com/1996-1073/8/7/7478/htm
http://www.mdpi.com/1996-1073/8/7/7478/htm
Affiliation(s): Vytauto Didžiojo universitetas
Žemės ūkio akademija
Appears in Collections:Universiteto mokslo publikacijos / University Research Publications

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