University of Oulu

Ashraf, F. B., Haghighi, A. T., Riml, J., Alfredsen, K., Koskela, J. J., Kløve, B., & Marttila, H. (2018). Changes in short term river flow regulation and hydropeaking in Nordic rivers. Scientific Reports, 8(1).

Changes in short term river flow regulation and hydropeaking in Nordic rivers

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Author: Ashraf, Faisal Bin1; Haghighi, Ali Torabi1; Riml, Joakim2;
Organizations: 1Water Resources and Environmental Engineering Research Unit, PO Box 4300, 90014 University of Oulu, Oulu, Finland
2Royal Institute of Technology (KTH), Brinellvägen 8, 114 28, Stockholm, Sweden
3Norwegian University of Science and Technology (NTNU) Vassbygget, 442, Valgrinda, Trondheim, Norway
4Finnish Environment Institute (SYKE), Mechelininkatu 34a, 00260 Helsinki, PO Box 140, Helsinki, Finland
Format: article
Version: published version
Access: open
Online Access: PDF Full Text (PDF, 5.9 MB)
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Language: English
Published: Springer Nature, 2018
Publish Date: 2019-06-18


Quantifying short-term changes in river flow is important in understanding the environmental impacts of hydropower generation. Energy markets can change rapidly and energy demand fluctuates at sub-daily scales, which may cause corresponding changes in regulated river flow (hydropeaking). Due to increasing use of renewable energy, in future hydropower will play a greater role as a load balancing power source. This may increase current hydropeaking levels in Nordic river systems, creating challenges in maintaining a healthy ecological status. This study examined driving forces for hydropeaking in Nordic rivers using extensive datasets from 150 sites with hourly time step river discharge data. It also investigated the influence of increased wind power production on hydropeaking. The data revealed that hydropeaking is at high levels in the Nordic rivers and have seen an increase over the last decade and especially over the past few years. These results indicate that increased building for renewable energy may increase hydropeaking in Nordic rivers.

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Series: Scientific reports
ISSN: 2045-2322
ISSN-E: 2045-2322
ISSN-L: 2045-2322
Volume: 8
Issue: 1
Article number: 17232
DOI: 10.1038/s41598-018-35406-3
Type of Publication: A1 Journal article – refereed
Field of Science: 218 Environmental engineering
1172 Environmental sciences
1171 Geosciences
Funding: This study was funded by Maj- and Tor Nessling foundation (Grant No. 201800109) and Olvi-foundation (Grant No. 201720212). Writing was supported by BioWater project, Nordic Center of Excellence, funded by NordForsk (Project Number 82263).
Copyright information: © The Author(s) 2018. This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder.