Next Article in Journal
Erythromycin Abatement from Water by Electro-Fenton and Peroxyelectrocoagulation Treatments
Previous Article in Journal
Groundwater Quality Evaluation of the Dawu Water Source Area Based on Water Quality Index (WQI): Comparison between Delphi Method and Multivariate Statistical Analysis Method
Article

Mediating the Effects of Climate on the Temperature and Thermal Structure of a Monomictic Reservoir through Use of Hydraulic Facilities

1
Department of Civil and Environmental Engineering, Tokyo Metropolitan University, 1-1, Minami-Osawa, Hachioji, Tokyo 192-0397, Japan
2
Land and Water Resources Engineering Division, IABE, CEAT, University of the Philippines Los Baños, Laguna 4031, Philippines
*
Author to whom correspondence should be addressed.
Academic Editor: Athanasios Loukas
Water 2021, 13(8), 1128; https://doi.org/10.3390/w13081128
Received: 10 March 2021 / Revised: 13 April 2021 / Accepted: 15 April 2021 / Published: 20 April 2021
(This article belongs to the Section Water Resources Management, Policy and Governance)
Climate warming can alter the thermal conditions of reservoirs. However, some hydraulic interventions can be explored to mitigate this impact. This study investigates the long-term effects of climate on the temperature and thermal structure of a monomictic reservoir that has had varying operations from 1959 to 2016. Reservoir progressively operated through three distinct periods, namely, (A) deep penstock withdrawal (DPW; 1959–1991), (B) purely selective withdrawal (SW; 1992–2001), and (C) combination of SW and vertical curtain (VC; 2002–2016). Although annual air temperatures are increasing (+0.15 °C decade−1) in the long term, the reservoir’s surface water temperatures have been found to be decreasing (−0.06 °C decade−1). Periods B and C produced colder profiles and exhibited lower heat content and higher potential energy anomaly than Period A. Furthermore, stronger thermoclines, as indicated by Brunt–Vaisala frequency, were observed in the two latter periods. The results of this study show that varying operations bear a stronger influence on the reservoir’s temperature and thermal structure than climate change itself. Mitigating the thermal impacts of climate warming in reservoirs appears promising with the use of SW and VC. View Full-Text
Keywords: surface water cooling; reservoir cooling; climate warming; selective withdrawal; vertical curtain; deep penstock withdrawal surface water cooling; reservoir cooling; climate warming; selective withdrawal; vertical curtain; deep penstock withdrawal
Show Figures

Graphical abstract

MDPI and ACS Style

Duka, M.A.; Shintani, T.; Yokoyama, K. Mediating the Effects of Climate on the Temperature and Thermal Structure of a Monomictic Reservoir through Use of Hydraulic Facilities. Water 2021, 13, 1128. https://doi.org/10.3390/w13081128

AMA Style

Duka MA, Shintani T, Yokoyama K. Mediating the Effects of Climate on the Temperature and Thermal Structure of a Monomictic Reservoir through Use of Hydraulic Facilities. Water. 2021; 13(8):1128. https://doi.org/10.3390/w13081128

Chicago/Turabian Style

Duka, Maurice A.; Shintani, Tetsuya; Yokoyama, Katsuhide. 2021. "Mediating the Effects of Climate on the Temperature and Thermal Structure of a Monomictic Reservoir through Use of Hydraulic Facilities" Water 13, no. 8: 1128. https://doi.org/10.3390/w13081128

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

Article Access Map by Country/Region

1
Search more from Scilit
 
Search
Back to TopTop