Experimental study on the impact of temperature on the dissipation process of supersaturated total dissolved gas

Shen, Xia; Liu, Shengyun; Li, Ran; Ou, Yangming

doi:10.1016/j.jes.2014.02.002

Cited by 28 publications

(17 citation statements)

References 12 publications

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“…This result demonstrates that the tolerance of Rock Carp is affected by prior exposure. Life stage and water temperature may also affect the tolerance of fish (Smiley et al 2011;Geist et al 2013;Shen et al 2014). Huang et al (2010) held smaller Rock Carp (weight 2.41-2.48 g) in higher temperature (25 • C) supersaturated water at a depth of 0.2 m. As shown in Figure 7, the result indicates that the fish examined by Huang et al had better tolerance for TDG supersaturation than did the fish in present study.…”

Section: Discussionmentioning

confidence: 43%

“…Hence, the impact of TDG supersaturation on fish species of the upper Yangtze River is receiving close attention (Huang et al 2010;Liu et al 2011;479 Chen et al 2012;Liang et al 2013). Tolerance to TDGsupersaturated water varies between species, temperature, and life stage (Beeman et al 2003;Smiley et al 2011;Geist et al 2013;Shen et al 2014). Avoidance of TDG-supersaturated water is exhibited by some species but not others (Blahm et al 1976).…”

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confidence: 99%

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Tolerance and Avoidance Behavior towards Gas Supersaturation in Rock Carp Procypris rabaudi with a History of Previous Exposure

et al. 2015

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Total dissolved gas (TDG) supersaturation on the upper Yangtze River basin is becoming increasingly serious because of the intense construction of high dams, posing a threat to resident fish. The tolerance and behavior characteristics of Rock Carp Procypris rabaudi preexposed to TDG‐supersaturated water were evaluated by placing juveniles (weight 6.4 ± 1.67 g, fork length 7.2 ± 0.7 cm; mean ± SD) in 35‐cm‐deep tanks at 130% supersaturation for 2.33 h as preexposure. Surviving fish were allowed 5 d of recovery in saturated‐equilibrium (100% TDG) water and then examined in an acute lethality experiment at TDG supersaturation values of 120, 125, 130, 135, 140, and 145%. The resulting median lethal times were 10.4, 4.6, 3.2, 2.1, 1.4, and 1.4 h, respectively. The preexposed fish showed a poorer tolerance to TDG‐supersaturated water than did a control group that were not preexposed for TDG above 120% supersaturation (P < 0.05 in cases where there was a significant difference between individual groups). Experiments on horizontal behavior and vertical behavior used the same preexposure routine, followed by 5 d of recovery in saturated‐equilibrium water. For all behavior experiments, both the preexposed and control groups showed significant avoidance responses to TDG‐supersaturated water; however, there were no significant differences between the preexposed and control groups.

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Section: Discussionmentioning

confidence: 43%

mentioning

confidence: 99%

Tolerance and Avoidance Behavior towards Gas Supersaturation in Rock Carp Procypris rabaudi with a History of Previous Exposure

et al. 2015

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“…In addition, Ma, Li, Feng, and Wang () found that the TDG supersaturation levels were 120% and 123%, respectively, 18 and 44 km downstream from the Manwan Dam, whereas the corresponding DO supersaturation levels were lower. Previous studies have shown that TDG supersaturation downstream of a dam is affected by the type of energy dissipation, the spill rate of the dam, and the water temperature (Shen, Liu, Li, & Ou, ; Feng, Li, Ma, & Wang, ). The Xiangjiaba Dam employs underflow energy dissipation, which causes the TDG supersaturation to be greater than that at the Ertan, Three Gorges and Manwan dams, which use ski‐jump energy dissipation (Politano, Arenas Amado, Bickford, Murauskas, & Hay, ).…”

Section: Discussionmentioning

confidence: 99%

In situ study on the impact of total dissolved gas supersaturation on endemic fish in the Upper Yangtze River

Xue

Liang

et al. 2019

River Research & Apps

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Total dissolved gas (TDG) supersaturation in the upper Yangtze River caused by high spill rates upstream of hydroelectric dams has become a serious environmental problem in recent years. TDG supersaturation downstream of the Xiangjiaba Dam was investigated during flood periods in 2014 and 2015. Alongside this, an in situ study was conducted to evaluate the impacts of TDG supersaturation on grass carp (Ctenopharyngodon idellus) and rock carp (Procypris rabaudi). TDG supersaturation levels ranged from 115% to 131% in 2014 and from 118% to 128% in 2015. During 2014, TDG supersaturation first decreased and then increased and finally remained relatively stable. In contrast, the TDG supersaturation level remained between 122-126% for a relatively long time in the 2015 study period. During 2014, grass carp confined to water depths of 0-1 and 1-2 m began to die after 45 hr of exposure, and most grass carp died between 90 and 130 hr when TDG supersaturation level was greater than 127%. The first observed death during 2015 occurred after 30-hr exposure. The survival of rock carp was greater than 50% when they were restricted to water depths of 0-1 m. Only three rock carp died when they were confined to water depths of 0-2 m, and no dead fish were recorded at water depths of 0-3 m. KEYWORDS acute lethality, endemic fish, high spill rates, in situ study, signs of GBD, TDG supersaturation

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“…Low-temperature outflow water in spring and summer may have an important impact on downstream farmland irrigation, fish breeding, and water quality [3][4][5][6] and can cause a series of ecological and environmental problems [7]. Regulation of the discharged water temperature and mitigation of the impact of low-temperature outflow water on the downstream ecology have become the focus of current environmental protection efforts [8].…”

Section: Introductionmentioning

confidence: 99%

Simulation and Experimental Analysis on the Load Characteristics of a Temperature-Control Curtain in a Thermally-Stratified Reservoir

et al. 2020

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Low-temperature discharged water from thermally-stratified reservoirs in spring and summer will have a negative environmental impact on fish breeding and agricultural irrigation downstream. The temperature-control curtain (TCC) is a selective withdrawal structure that can effectively change the discharged water temperature. Compared with a traditional selective withdrawal project, a TCC project has the advantages of low cost and simple construction and can even be added to operating reservoirs without impacting power generation. Analysis of the load characteristics is the key to the application of TCC engineering. This paper establishes a three-dimensional numerical model simulation and verifies it with physical model experimental results. The crucial parameters affecting the load characteristics of TCC are investigated, including the water blocking rate, area ratio, inclination ratio, inflow velocity, and water temperature stratification ratio. The results show that: (1) This numerical simulation approach can be used to predict the drag coefficient and the load of a TCC; (2) the water blocking rate has the greatest influence on the drag coefficient, and it is the most critical indicator of the TCC load; and (3) the drag coefficient exponentially increases with an increasing water blocking rate, quadratically increases with an increasing area ratio, linearly increases with an increasing inclination ratio, and linearly increases with an increasing water temperature stratification ratio.

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Experimental study on the impact of temperature on the dissipation process of supersaturated total dissolved gas

Cited by 28 publications

References 12 publications

Tolerance and Avoidance Behavior towards Gas Supersaturation in Rock Carp Procypris rabaudi with a History of Previous Exposure

Tolerance and Avoidance Behavior towards Gas Supersaturation in Rock Carp Procypris rabaudi with a History of Previous Exposure

In situ study on the impact of total dissolved gas supersaturation on endemic fish in the Upper Yangtze River

Simulation and Experimental Analysis on the Load Characteristics of a Temperature-Control Curtain in a Thermally-Stratified Reservoir

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