Joint use of the HEC-2 model and a physical model for floodline delineation upstream of a bridge

This paper reports the findings of a physical model study of backwaters generated in the vicinity of the Queen Street bridge crossing of the North Thames River in the town of St. Marys, Ontario. Flood profiles generated in the physical model are compared with those observed in the field and with "HEC-2"-generated profiles. Certain limitations of the HEC-2 model, in regards to bridge hydraulics, are identified. The physical model is also used to compare several flood protection alternatives for the town, for both the 100- and the 500-year flows. Floodline delineation was based on both physical model and HEC-2 simulations. The former were adopted for the reach simulated by the physical model, with the latter being employed for the reaches upstream of the physically modelled reach. Key words: physical model, numerical model, bridge backwater, floodline delineation.

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Canal Wave Oscillations from Expansion of I-84 Bridge in Boise, Idaho

Transportation Research Record Journal of the Transportation Research Board ◽

10.3141/2309-19 ◽

2012 ◽

Vol 2309 (1) ◽

pp. 200-205

Author(s):

William Rahmeyer ◽

J. M. Clegg ◽

S. L. Barfuss

Keyword(s):

New York ◽

Physical Model ◽

Unique Solution ◽

Wave Phenomenon ◽

Bridge Columns ◽

Bridge Abutments ◽

Wave Problem ◽

Model Study ◽

Bridge Crossing

Recent improvements and the widening of the I-84 Bridge crossing of the New York Canal in Boise, Idaho, have increased the number of bridge columns from 28 to 60. The resulting structure has two parallel rows of columns that extend across the width of the bridge longitudinally within the canal. After the widening of the bridge and addition of the bridge columns, the canal began experiencing an oscillating wave phenomenon that originated from the bridge columns and caused erosion of upstream and downstream canal banks and bridge abutments. A physical model study was conducted to investigate the wave phenomenon and determine what modifications to the columns or canal would be necessary to prevent the wave oscillations. The physical model was successful in simulating the wave phenomenon, and four different modifications for resolving the wave problem were tested in the model. A unique solution was found that used precast nose cones attached to selected columns. The nose cones have been installed in the prototype bridge crossing, and no wave oscillations have occurred since installation. This paper discusses the study to simulate the wave phenomenon and the four modifications that were evaluated to reduce or prevent wave oscillations.

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DETERMINATION OF WAVE CREST ELEVATIONS FOR SLAMMING FORCES ON JETTY WITH VERTICAL WALL END

Coastal Engineering Proceedings ◽

10.9753/icce.v35.waves.7 ◽

2017 ◽

pp. 7

Author(s):

Esin Ozkan Cevik ◽

Yalcin Yuksel ◽

Burak Aydogan ◽

Berna Ayat Aydogan ◽

Tugce Yuksel

Keyword(s):

Numerical Model ◽

Physical Model ◽

Wave Height ◽

Vertical Wall ◽

Wave Disturbance ◽

Wave Crest ◽

Shore Protection ◽

Model Study ◽

Vertical Walls

Wave disturbance study for a closed end jetty conducted both in laboratory and through a numerical model is presented in this study. Shore protection structures and the structures at the end of the piers are considered for the calculation of the wave disturbance map. The connection locations of the jetties have been designed as vertical walls. These vertical structures and armored waterfront structures would affect the wave behavior in the study area along jetty axis causing reflection of waves and therefore the wave height in front of the structures might increase. This study intends to clarify wave agitation problem by using a numerical model with the help of physical model study.

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A 3-D prognostic numerical model study of the Georges Bank ecosystem. Part I: physical model

Deep Sea Research Part II Topical Studies in Oceanography ◽

10.1016/s0967-0645(00)00124-7 ◽

2001 ◽

Vol 48 (1-3) ◽

pp. 419-456 ◽

Cited By ~ 38

Author(s):

Changsheng Chen ◽

Robert Beardsley ◽

Peter J.S. Franks

Keyword(s):

Numerical Model ◽

Physical Model ◽

Georges Bank ◽

Model Study ◽

Numerical Model Study

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A 3-D prognostic numerical model study of the Georges bank ecosystem. Part II: biological–physical model

Deep Sea Research Part II Topical Studies in Oceanography ◽

10.1016/s0967-0645(00)00125-9 ◽

2001 ◽

Vol 48 (1-3) ◽

pp. 457-482 ◽

Cited By ~ 53

Author(s):

Peter J.S. Franks ◽

Changsheng Chen

Keyword(s):

Numerical Model ◽

Physical Model ◽

Georges Bank ◽

Model Study ◽

Numerical Model Study

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On Riccia marginata and related species (Ricciaceae, Marchantiophyta)

Novosti sistematiki nizshikh rastenii ◽

10.31111/nsnr/2012.46.298 ◽

2012 ◽

Vol 46 ◽

pp. 298-305 ◽

Cited By ~ 1

Author(s):

A. D. Potemkin ◽

T. Ahti

Keyword(s):

Related Species ◽

Lake Ladoga ◽

Leningrad Region ◽

Sem Images ◽

North Shore ◽

The North ◽

Molecular Studies ◽

The Future ◽

The Town

Riccia marginata Lindb. was described by S. O. Lindberg (1877) from the outskirts of the town of Sortavala near the north shore of Lake Ladoga, Republic of Karelia, Russia. The species has been forgotten in most recent liverwort accounts of Europe, including Russia. Lectotypification of R. marginata is provided. R. marginata shares most characters with R. beyrichiana Hampe ex Lehm. It differs from “typical” plants of R. beyrichiana in having smaller spores, with ± distinctly finely areolate to roughly papillose proximal surfaces and a narrower and shorter thallus, as well as in scarcity or absence of marginal hairs. It may represent continental populations of the suboceanic-submediterranean R. beyrichiana, known in Russia from the Leningrad Region and Karelia only. The variability of spore surfaces in R. beyrichiana is discussed and illustrated by SEM images. A comparison with the spores of R. bifurca Hoffm. is provided. The question how distinct R. marginata is from R. beyrichiana needs to be clarified by molecular studies in the future, when adequate material is available. R. marginata is for the time being, provisionally, included in R. beyrichiana.

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ANTHROPOGENIC AND ECONOMIC FACTORS OF THE СRIMEAN ECOLOGY

Construction economic and environmental management ◽

10.37279/2519-4453-2020-2-5-14 ◽

2020 ◽

pp. 5-14

Author(s):

N.P. Demchenko ◽

N.Yu. Polyakova

Keyword(s):

Business Owners ◽

Crimean Peninsula ◽

The North ◽

Chemical Release ◽

The Crimea ◽

Russian Plant ◽

The Republic ◽

The Town ◽

Integrated Indicators ◽

The Crimean Peninsula

The situation in the ecology of the Crimean Peninsula in recent years was discussed in the article. The analysis of absolute and integrated indicators of the anthropogenic impact showed that the ecological situation remains difficult, and according to some indicators even continues to deteriorate. In summer 2018, the situation had worsened because of the large chemical release of titanium dioxide on the north of the Crimea from the holding pond of a large Russian plant that is situated near the town of Armyansk. This, in turn, led to the contamination of the large territory on the north of the peninsula. This fact indicates insufficient control by officials of the Republic of Crimea over the implementation of the RF laws for environmental protection by business owners of various forms of ownership, especially private ownership, the level of responsibility for the environment of which is very low.

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Physical Model Study of Flowerpot Discharge Outlet, Western Closure Complex, New Orleans, Louisiana

10.21236/ada583046 ◽

2013 ◽

Author(s):

Stephen T. Maynord

Keyword(s):

New Orleans ◽

Physical Model ◽

Model Study

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Two-Dimensional Numerical Modeling of Flow in Physical Models of Rock Vane and Bendway Weir Configurations

Water ◽

10.3390/w13040458 ◽

2021 ◽

Vol 13 (4) ◽

pp. 458

Author(s):

Drew C. Baird ◽

Benjamin Abban ◽

S. Michael Scurlock ◽

Steven B. Abt ◽

Christopher I. Thornton

Keyword(s):

Numerical Modeling ◽

Physical Model ◽

Numerical Models ◽

Hydraulic Performance ◽

Physical Models ◽

Protection Measures ◽

Design Engineers ◽

Model Study ◽

Study Results ◽

Wide Range

While there are a wide range of design recommendations for using rock vanes and bendway weirs as streambank protection measures, no comprehensive, standard approach is currently available for design engineers to evaluate their hydraulic performance before construction. This study investigates using 2D numerical modeling as an option for predicting the hydraulic performance of rock vane and bendway weir structure designs for streambank protection. We used the Sedimentation and River Hydraulics (SRH)-2D depth-averaged numerical model to simulate flows around rock vane and bendway weir installations that were previously examined as part of a physical model study and that had water surface elevation and velocity observations. Overall, SRH-2D predicted the same general flow patterns as the physical model, but over- and underpredicted the flow velocity in some areas. These over- and underpredictions could be primarily attributed to the assumption of negligible vertical velocities. Nonetheless, the point differences between the predicted and observed velocities generally ranged from 15 to 25%, with some exceptions. The results showed that 2D numerical models could provide adequate insight into the hydraulic performance of rock vanes and bendway weirs. Accordingly, design guidance and implications of the study results are presented for design engineers.

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