Total Dissolved Gas Monitoring in Chum Salmon Spawning Gravels Below Bonneville Dam

Arntzen, Evan; Geist, David R.; Panther, Jennifer L.; Dawley, Earl M.

doi:10.2172/951872

Cited by 4 publications

(7 citation statements)

References 9 publications

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“…Consequently, TDG was generally depth-compensated sufficiently to mitigate negative impacts to sac fry during 2006. Uncompensated TDG levels at the Ives Island hyporheic stations did exceed 103% for short periods and ranged up to 118.2% (Arntzen et al 2007a). These levels, combined with waterlevel data for other years, suggested TDG could negatively affect chum sac fry during lower-water years when compensation depths were not available.…”

Section: Introductionmentioning

confidence: 90%

“…The other site was on the left bank near Multnomah Falls at rkm 220, 14.8 km downstream from Bonneville Dam (Figure 1.1). At the Ives Island site, we utilized three pairs of piezometers that had been installed during February of 2006 (Arntzen et al 2007a). Each pair of piezometers consisted of one river and one hyporheic piezometer.…”

Section: Study Sitesmentioning

confidence: 99%

“…During 2007, the design of the river piezometers was similar to that used in 2006 (Arntzen et al 2007a). We made some slight modifications to the hyporheic piezometer design, primarily to facilitate installation ease.…”

Section: Water Quality Monitoring At Ives Island and Multnomah Falls mentioning

confidence: 99%

“…Detailed specifications, including accuracies and resolutions of the sensors, are listed in Table 1.1 for both models. Most MiniSondes were equipped with stirrers, which were shown to be necessary to remove air bubbles from the TDG sensor during 2006 laboratory testing (Arntzen et al 2007a). The stirrers consisted of a 1.27-cm-wide revolving plastic blade attached to the MiniSonde next to the TDG sensor.…”

Section: Effects Of Total Dissolved Gas On Chum Salmon Frymentioning

confidence: 99%

“…Results from 2006 (Arntzen et al 2007a) showed that groundwater-surface water interaction differed between the Ives Island and Multnomah Falls locations. Egg pocket concentrations of TDG, dissolved oxygen, and temperature remained stable at Multnomah Falls despite significant fluctuations in river depth.…”

Section: Introductionmentioning

confidence: 99%

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Effects of Total Dissolved Gas on Chum Salmon Fry Incubating in the Lower Columbia River

Arntzen¹,

Hand²,

Geist³

et al. 2008

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Section: Introductionmentioning

confidence: 90%

Section: Study Sitesmentioning

confidence: 99%

Section: Water Quality Monitoring At Ives Island and Multnomah Falls mentioning

confidence: 99%

Section: Effects Of Total Dissolved Gas On Chum Salmon Frymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Effects of Total Dissolved Gas on Chum Salmon Fry Incubating in the Lower Columbia River

Arntzen¹,

Hand²,

Geist³

et al. 2008

Self Cite

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The Effects of Total Dissolved Gas on Chum Salmon Fry Survival, Growth, Gas Bubble Disease, and Seawater Tolerance

Geist

Linley

Cullinan

et al. 2013

N American J Fish Manag

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Chum Salmon Oncorhynchus keta alevins developing in gravel downstream of Bonneville Dam on the Columbia River are exposed to elevated total dissolved gas (TDG) when water is spilled to move migrating salmon smolts to the ocean. We studied whether alevins that were exposed to six levels of dissolved gas ranging from 100% to 130% TDG at three development periods between hatch and emergence (hereafter, early, middle, and late stages) experienced differential mortality, growth, gas bubble disease, or seawater tolerance. Each life stage was exposed for 49 d (early stage), 28 d (middle stage), or 15 d (late stage) beginning at 13, 34, and 47 d posthatch, respectively, through emergence. Mortality for all stages was estimated to be 8% (95% confidence interval [CI] = 4–12%) when dissolved gas levels were less than 117% TDG. Mortality increased as dissolved gas levels rose above 117% TDG; the lethal concentration producing 50% mortality was 128.7% TDG (95% CI = 127.2–130.3% TDG) in the early and middle stages. There was no evidence that gas exposure affected growth. The proportion of fish with gas bubble disease increased with increasing gas concentrations, and bubbles occurred most commonly in the nares and gastrointestinal tract. Early stage fish exhibited higher ratios of filamental to lamellar gill chloride cells than late‐stage fish, and these ratios increased and decreased for early and late‐stage fish, respectively, as gas levels increased; however, there were no significant differences in mortality between life stages after 96 h in seawater. The study results suggest that water quality guidelines for dissolved gas (≤105% TDG) offer a conservative level of protection to Chum Salmon alevins incubating in gravel habitat downstream of Bonneville Dam.Received June 1, 2012; accepted November 13, 2012

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Evaluating natural degassing in a river to create a baseline for comparison to technical degassing methods.

Ludwig Kuhn,

Solemslie,

Hihn

et al. 2023

J. Phys.: Conf. Ser.

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In Norway, a recent project used a risk matrix to identify about 200 hydropower plants ( 11 % of the total number) of being in high risk of producing air-supersaturated water. The combined installed capacity of these hydropower plants amounts to more than 45 % of Norway’s total installed hydropower capacity. Total dissolved gas (TDG) supersaturation in water is, dependent on the actual saturation value and the duration of the occurrence, lethal to certain types of fish and aquatic invertebrates. Natural degassing is highly dependent on the morphology of the downstream water system, but tends to be insufficiently slow with regard to lethality of TDG supersaturation. The Brokke power plant in southern Norway is known to create TDG supersaturation. Since 2012, continuous monitoring of the TDG level happens at the power plant outlet and several positions in the Otra river downstream. Measurement data has been evaluated and a method has been developed to calculate the liquid-gas mass transfer coefficient kLa as an indicator for the natural degassing efficiency within certain stretches of the river using assumptions for the river’s geometry. The results are in agreement with former evaluation of the measurements. At the Waterpower Laboratory at NTNU in Trondheim, Norway, a test rig has been designed and instrumented to prove the effectiveness of degassing methods. An in-house pressure system is used to produce air-supersaturated water, which is then channeled through an open flume. At the flume’s inlet, the degassing mechanism is installed. The TDG levels are monitored both upstream and at downstream the degassing device. The kLa will be used to compare natural degassing in the river downstream Brokke power plant to the experimental degassing methods in the Waterpower Laboratory.

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Total Dissolved Gas Monitoring in Chum Salmon Spawning Gravels Below Bonneville Dam

Cited by 4 publications

References 9 publications

Effects of Total Dissolved Gas on Chum Salmon Fry Incubating in the Lower Columbia River

Effects of Total Dissolved Gas on Chum Salmon Fry Incubating in the Lower Columbia River

The Effects of Total Dissolved Gas on Chum Salmon Fry Survival, Growth, Gas Bubble Disease, and Seawater Tolerance

Evaluating natural degassing in a river to create a baseline for comparison to technical degassing methods.

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