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- Title
The Effect of Down-Cascade Re-Regulation on Alleviating the Flow Regime Alteration Induced by an Up-Cascade Reservoir.
- Authors
Wang, Yongfei; Wang, Xianxun; Virguez, Edgar; Zheng, Kang; Hu, Ting; Mei, Yadong; Wang, Hao
- Abstract
An analysis of the effect on the flow regime caused by reservoir operation is crucial to balancing the exploitation and protection of water resources. The long-term effect of this on the intraday scale and small storage capacity is considerable, but rarely analyzed. This study examines the world's largest dual-cascade hydro-junction, the Three Gorges Dam and Gezhouba Dam junction, as a case study, adopting eight indices to characterize the reservoir's inflow and outflow fluctuation. In doing this, we evaluate the alteration of the flow regime induced by an up-cascade reservoir and its alleviation caused by the down-cascade re-regulation. The results show: (1) an increment of the river flow fluctuation at the Three Gorges Dam, matched with hourly scale alleviation at the Gezhouba Dam; (2) a reduction (25.09~41.35%) in the quantitative indices of the river flow regime fluctuation; (3) perturbations on the power output. These findings provide references for developing methods to assess the re-regulation mechanisms in systems with upper- and lower-cascades.
- Subjects
SAN Xia Dam (China); STREAMFLOW; WATER supply; DAMS; GORGES; RESOURCE exploitation
- Publication
Water (20734441), 2023, Vol 15, Issue 12, p2166
- ISSN
2073-4441
- Publication type
Article
- DOI
10.3390/w15122166