scholarly journals The characteristic of the plunging flow and the streaming flow in the pool-weir-fishway and the swimming behavior of leuciscus hakonensis.

2000 ◽  
Vol 28 ◽  
pp. 333-338 ◽  
Author(s):  
Kazufumi HAYASHIDA ◽  
Takahide HONDA ◽  
Yuichi KAYABA ◽  
Yukihiro SHIMATANI
Keyword(s):  
Swimming Behavior ◽  
Streaming Flow ◽  
Plunging Flow

scholarly journals Analysis of Vortex Pool-and-Chute Fishway

2016 ◽  
Vol 13 (4) ◽  
Author(s):  
Mathew Nyberg ◽  
Brian Draeger ◽  
Brian Weekly ◽  
Eileen Cashman ◽  
Michael Love
Keyword(s):  
Dimensional Analysis ◽  
Calculation Method ◽  
Fish Passage ◽  
Scale Model ◽  
Flow Conditions ◽  
Flow Rates ◽  
Flow Calculation ◽  
Flow Method ◽  
Streaming Flow ◽  
Plunging Flow

Fishways are constructed in riverine habitats where structures such as culverts, dams, and flood channels have negatively impacted flow conditions suitable for the movement of native and migratory fish species. These auxiliary channels are engineered to resist gravitational force with frictional force, resulting in sustained depth and reduced velocity over a range of design flow rates. The Chézy hydraulic resistance coefficient accounts for such forces and provides a metric useful for determining the effectiveness of a fishway to alter flow conditions prohibitive to the passage of fish. The objective of this analysis was to use a scale model of an innovative vortex pool-and-chute fishway, that operates with both plunging and streaming flow simultaneously, designed by Michael Love and Associates, to determine the Chézy resistance coefficients over a range of flow rates under controlled hydraulic conditions. Using dimensional analysis to ensure proper scaling allowed laboratory measurements of the model to be translated into a real-world prototype design. The conceptual prototype fishway is a 144-foot-long by 30-foot-wide channel with an 8% slope. A 1:15 scale model was constructed to evaluate the design at prototype equivalent flow rates between 58 and 283 cubic feet per second (cfs). Chézy coefficients were estimated by two different calculation methods; the streaming flow method and the streaming and plunging flow method. Coefficients ranging between 22.3 and 39.2 ft1/2/s were determined by the streaming flow calculation method, whereas the streaming and plunging flow calculation method yielded estimates from 18.9 to 25.0 ft1/2/s at corresponding flow rates. For flows that were exclusively plunging, values of 32.2 to 41.9 ft1/2/s were found. In general, Chézy coefficient estimates were observed to decrease with increasing discharge and values were found to be comparable to those calculated for fishways implemented at similar slopes. The preliminary model fishway results indicated that implementation of a prototype fishway could effectively alter flows for adequate fish passage under the given conditions. KEYWORDS: Hydraulics; Fish Passage; Fishway; Chézy Coefficient; Geometric Scaling; Froude Scaling; Streaming Flow; Plunging Flow; Dimensional Analysis; Similitude

A study on the visualization of the swimming behavior of sandfish (Arctoscopus japonicus)

2016 ◽  
Vol 9 (1) ◽  
pp. 60
Author(s):  
Yongbeom PYEON ◽  
Eunseok YANG ◽  
Shinku KANG ◽  
Kyunghoon LEE
Keyword(s):  
Swimming Behavior

scholarly journals Large-Scale Flows in the Local Universe

1996 ◽  
Vol 168 ◽  
pp. 175-182 ◽  
Author(s):  
D.S. Mathewson ◽  
V.L. Ford
Keyword(s):  
Large Scale ◽  
Velocity Measurements ◽  
Local Universe ◽  
Peculiar Velocities ◽  
Redshift Surveys ◽  
Density Maps ◽  
The Universe ◽  
Great Wall ◽  
Great Attractor ◽  
Streaming Flow

Peculiar velocity measurements of 2500 southern spiral galaxies show large-scale flows in the direction of the Hydra-Centaurus clusters which fully participate in the flow themselves. The flow is not uniform over this region and seems to be associated with the denser regions which participate in the flow of amplitude about 400km/s. In the less dense regions the flow is small or non-existent. This makes the flow quite asymmetric and inconsistent with that expected from large-scale, parallel streaming flow that includes all galaxies out to 6000km/s as previously thought. The flow cannot be modelled by a Great Attractor at 4300km/s or the Centaurus clusters at 3500km/s. Indeed, from the density maps derived from the redshift surveys of “optical” and IRAS galaxies, it is difficult to see how the mass concentrations can be responsible particularly as they themselves participate in the flow. These results bring into question the generally accepted reason for the peculiar velocities of galaxies that they arise solely as a consequence of infall into the dense regions of the universe. To the N. of the Great Attractor region, the flow increases and shows no sign of diminishing out to the redshift limit of 8000km/s in this direction. We may have detected flow in the nearest section of the Great Wall.

Ketoprofen affects swimming behavior and impairs physiological endpoints of Daphnia magna

2020 ◽  
Vol 725 ◽  
pp. 138312 ◽  
Author(s):  
Adam Bownik ◽  
Magdalena Jasieczek ◽  
Ewelina Kosztowny
Keyword(s):  
Daphnia Magna ◽  
Swimming Behavior

G-Protein Modulators Alter the Swimming Behavior and Calcium Influx of Paramecium tetraurelia

2003 ◽  
Vol 50 (5) ◽  
pp. 349-355 ◽  
Author(s):  
JOSE ONDARZA ◽  
STEVEN B. SYMINGTON ◽  
JUDITH L. HOUTEN ◽  
J. MARSHALL CLARK
Keyword(s):  
G Protein ◽  
Calcium Influx ◽  
Swimming Behavior ◽  
Paramecium Tetraurelia

Interactions of 2-PPM Lead in the Water Supply with Food Deprivation upon Maze-Swimming Behavior of Mice

1982 ◽  
Vol 55 (2) ◽  
pp. 515-519 ◽  
Author(s):  
S. Kowalski ◽  
G. H. Parker ◽  
M. A. Persinger
Keyword(s):  
Drinking Water ◽  
Water Supply ◽  
Food Deprivation ◽  
Tap Water ◽  
Swimming Behavior ◽  
Statistical Techniques ◽  
Multivariate Statistical Techniques ◽  
Multivariate Statistical ◽  
Food Condition ◽  
Ad Libitum

Mice that had been given either tap water or 2 ppm lead in their drinking water and either severely food deprived (3 days before testing) or allowed food ad libitum demonstrated significant interactions of lead treatment by day by food condition and lead by block. Although not statistically significant, the food deprived-lead treated mice displayed more errors and longer latencies than the ad libitum-water controls. The food deprived-water controls and ad libitum-lead-treated mice displayed intermediate values. The importance of using multivariate statistical techniques that can evaluate dynamic repeated behavioral measurements is emphasized.

Swimming behavior of the spoon worm Urechis unicinctus (Annelida, Echiura)

Zoology ◽  
2014 ◽  
Vol 117 (3) ◽  
pp. 216-223 ◽  
Author(s):  
Hirokazu Abe ◽  
Waka Sato-Okoshi ◽  
Masaatsu Tanaka ◽  
Kenji Okoshi ◽  
Wataru Teramoto ◽  
...  
Keyword(s):  
Swimming Behavior ◽  
Urechis Unicinctus

Steady streaming within a periodically rotating sphere

2008 ◽  
Vol 608 ◽  
pp. 71-80 ◽  
Author(s):  
RODOLFO REPETTO ◽  
JENNIFER H. SIGGERS ◽  
ALESSANDRO STOCCHINO
Keyword(s):  
Series Expansion ◽  
Oscillation Frequency ◽  
Small Amplitude ◽  
Quantitative Agreement ◽  
Torsional Oscillations ◽  
Rotating Sphere ◽  
Good Quantitative Agreement ◽  
Steady Streaming ◽  
Theory And Experiments ◽  
Streaming Flow

We consider the flow in a spherical chamber undergoing periodic torsional oscillations about an axis through its centre, and analyse it both theoretically and experimentally. We calculate the flow in the limit of small-amplitude oscillations in the form of a series expansion in powers of the amplitude, finding that at second order, a steady streaming flow develops consisting of two toroidal cells. This streaming behaviour is also observed in our experiments. We find good quantitative agreement between theory and experiments, and we discuss the dependence of the steady streaming behaviour as both the oscillation frequency and amplitude are varied.

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