Fish bubble illness may be more common if there is a lot of total dissolved gas (TDG) downstream of a spillway. Supersaturated TDG is transported and dispersed more slowly in reservoirs than in natural rivers due to the increased water depth and reduced turbulence, putting fish in danger. This study presents the operating restrictions for reducing the impact of TDG supersaturation on fish in the Bala Reservoir on the Zumuzu River. The paper discusses how upstream and downstream power plants work together. A laterally averaged two-dimensional model is used to simulate TDG transportation and dissipation, hydrodynamics, and water temperature in the Bala Reservoir. Based on a comparison of simulation results from various operational scenarios, this study proposes a regulatory scheme. It is recommended that the upstream power plant use an interval-discharge pattern rather than a continuous-discharge strategy to reduce the harmful effects of supersaturated TDG on the reservoir. It is suggested that the downstream power station's discharge structure be a surface tunnel rather than a bottom tunnel. This publication serves as a guidance for ecologically sustainable reservoir operations in large and deep reservoirs.
Jingjie Feng,
State Key Laboratory of Hydraulics and Mountain River Engineering, Sichuan University, No.24 of South Section One, Yihuang Road, Chengdu, 610065, China.
Ran Li,
State Key Laboratory of Hydraulics and Mountain River Engineering, Sichuan University, No.24 of South Section One, Yihuang Road, Chengdu, 610065, China.
Ruifeng Liang,
State Key Laboratory of Hydraulics and Mountain River Engineering, Sichuan University, No.24 of South Section One, Yihuang Road, Chengdu, 610065, China.
Xia Shen,
State Key Laboratory of Hydraulics and Mountain River Engineering, Sichuan University, No.24 of South Section One, Yihuang Road, Chengdu, 610065, China.
Please see the link here: https://stm.bookpi.org/CAGEES-4/article/view/7119
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