Next Article in Journal
Towards the Development of Perennial Barley for Cold Temperate Climates—Evaluation of Wild Barley Relatives as Genetic Resources
Next Article in Special Issue
Floating Away: The Impact of Hydroelectric Power Stations on Tourists’ Experience in Iceland
Previous Article in Journal
Daily Emotional Labor, Negative Affect State, and Emotional Exhaustion: Cross-Level Moderators of Affective Commitment
Article Menu
Issue 6 (June) cover image

Export Article

Open AccessArticle
Sustainability 2018, 10(6), 1968; https://doi.org/10.3390/su10061968

Effects of Lake–Reservoir Pumped-Storage Operations on Temperature and Water Quality

1
Eawag, Swiss Federal Institute of Aquatic Science and Technology, Surface Waters—Research and Management, CH-6047 Kastanienbaum, Switzerland
2
EPFL, Physics of Aquatic Systems Laboratory—Margaretha Kamprad Chair, ENAC-IEE-APHYS, CH-1015 Lausanne, Switzerland
*
Author to whom correspondence should be addressed.
Received: 14 May 2018 / Revised: 8 June 2018 / Accepted: 8 June 2018 / Published: 12 June 2018
(This article belongs to the Special Issue Hydropower Production)
View Full-Text   |   Download PDF [1906 KB, uploaded 12 June 2018]   |  

Abstract

Pumped-storage (PS) hydropower plants are expected to make an important contribution to energy storage in the next decades with growing market shares of new renewable electricity. PS operations affect the water quality of the connected water bodies by exchanging water between them but also by deep water withdrawal from the upper water body. Here, we assess the importance of these two processes in the context of recommissioning a PS hydropower plant by simulating different scenarios with the numerical hydrodynamic and water quality model CE-QUAL-W2. For extended PS operations, the results show significant impacts of the water exchange between the two water bodies on the seasonal dynamics of temperatures, stratification, nutrients, and ice cover, especially in the smaller upper reservoir. Deep water withdrawal was shown to strongly decrease the strength of summer stratification in the upper reservoir, shortening its duration by ~1.5 months, consequently improving oxygen availability, and reducing the accumulation of nutrients in the hypolimnion. These findings highlight the importance of assessing the effects of different options for water withdrawal depths in the design of PS hydropower plants, as well as the relevance of defining a reference state when a PS facility is to be recommissioned. View Full-Text
Keywords: hydropower; stratification; reservoir modeling; recommissioning hydropower; stratification; reservoir modeling; recommissioning
Figures

Figure 1

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

Supplementary material

SciFeed

Share & Cite This Article

MDPI and ACS Style

Kobler, U.G.; Wüest, A.; Schmid, M. Effects of Lake–Reservoir Pumped-Storage Operations on Temperature and Water Quality. Sustainability 2018, 10, 1968.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Related Articles

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Sustainability EISSN 2071-1050 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top