Development of an inflow-controlled environmental flow regime for a Norwegian river

Hydropower produces 99% of the electricity in Norway, and a large number of rivers are regulated. Currently, static minimum flow regimes are used as a mitigation measure for most of these developments, usually having fixed values for winter and summer flow. Improved knowledge on the importance of va...

Full description

Bibliographic Details
Published in:River Research and Applications
Main Authors: Alfredsen, Knut, Harby, Atle, Linnansaari, Tommi, Ugedal, O
Format: Article in Journal/Newspaper
Language:English
Published: Wiley 2012
Subjects:
Online Access:http://hdl.handle.net/11250/2479981
https://doi.org/10.1002/rra.1550
Description
Summary:Hydropower produces 99% of the electricity in Norway, and a large number of rivers are regulated. Currently, static minimum flow regimes are used as a mitigation measure for most of these developments, usually having fixed values for winter and summer flow. Improved knowledge on the importance of variability in flow regimes has led to research on alternative solutions to the static minimum flow regimes. This paper describes the development of an environmental flow regime that is designed to follow the variation in natural inflow. The flow regime is designed using an adaptation of the building block methodology and linked to high, normal and low natural flow conditions. The work is focused on the river Daleelva in western Norway where Atlantic salmon is the key species. The paper also describes how the variable environmental flow regime can be implemented in practice as it pertains to current Norwegian legislation. submittedVersion This is the pre-peer reviewed version of the following article: [DEVELOPMENT OF AN INFLOW-CONTROLLED ENVIRONMENTAL FLOW REGIME FOR A NORWEGIAN RIVER], which has been published in final form at [http://onlinelibrary.wiley.com/doi/10.1002/rra.1550/abstract]. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Self-Archiving.