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Climatic Change

, Volume 152, Issue 3–4, pp 413–429 | Cite as

Combined effects of pumped-storage operation and climate change on thermal structure and water quality

  • Ulrike Gabriele KoblerEmail author
  • Alfred Wüest
  • Martin Schmid
Article

Abstract

The assessment of ecological impacts of pumped-storage (PS) hydropower plants on the two connected water bodies is usually based on present climatic conditions. However, significant changes in climate must be expected during their long concession periods. We, therefore, investigate the combined effects of climate change and PS operations on water temperature and quality, as well as extent and duration of stratification and ice cover, using a site in Switzerland. For this purpose, a coupled two-dimensional hydrodynamic and water quality model for the two connected water bodies is run with 150 years long synthetic stochastic meteorological forcing for both current and future climate conditions under two PS and two reference scenarios. The results show relevant synergistic and antagonistic effects of PS operations and climate change. For example, hypolimnion temperatures in September are projected to increase by < 0.6 °C in a near-natural reference scenario and by ~ 2.5 °C in an extended PS scenario. Ice cover, which occurs every year under near-natural conditions in the current climate, would almost completely vanish with extended PS operation in the future climate. Conversely, the expected negative impacts of climate change on hypolimnetic dissolved oxygen concentrations are partially counteracted by extended PS operations. We, therefore, recommend considering future climate conditions for the environmental impact assessment in the planning of new or the recommissioning of existing PS hydropower plants.

Notes

Acknowledgements

We want to thank Dirk Schlabing for his insights on the weather generator. Moreover, we acknowledge P. Meier, who tackled Python library issues during the weather generator set up. We would also like to thank two anonymous reviewers and K. Rinke for valuable suggestions to improve this manuscript.

Funding

This study was funded by the Swiss Federal Railways (SBB AG).

Compliance with ethical standards

Conflict of interest

The authors declare that they have no conflict of interest.

Supplementary material

10584_2018_2340_MOESM1_ESM.pdf (4 mb)
ESM 1 (PDF 4.03 mb)

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Copyright information

© Springer Nature B.V. 2018

Authors and Affiliations

  1. 1.Surface Waters—Research and ManagementEawag, Swiss Federal Institute of Aquatic Science and TechnologyKastanienbaumSwitzerland
  2. 2.Physics of Aquatic Systems Laboratory—Margaretha Kamprad Chair, ENAC-IEE-APHYSEPFLLausanneSwitzerland

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