Hydraulics of Dams and River Structures: Proceedings of the International Conference, Tehran, Iran, 26-28 April 2004

by Yazdandoost; Farhad

• ISBN13: 9789058096326
• ISBN10: 9058096327
• Edition: 1st
• Format: Hardcover
• Copyright: 2004-04-15
• Publisher: CRC Press

Summary

This book contains papers of the International Conference onHydraulics of Dams and Rivers Structures, held in Tehran, Iran.Topics covered are: air-water flows; intakes and outlets; hydrodynamic forces; energy dissipators; stepped spillways; scouring and sedimentation around structures; numerical approaches in river hydrodynamics; river response to hydraulic structures hydroinformatic applications. The papers presented serve the research and professional communities dealing with development issues within the water sector. Encounter of research ideas and achievements and exchange of experiences, gained in the conference, should lead to more sustainable and cost-effective solutions.

Table of Contents

Preface	p. IX
Hydraulic Structures
Air-water flows
Air-water flows in water engineering and hydraulic structures. Basic processes and metrology	p. 3
De-aeration of a diversion tunnel of a large-scale hydroelectric scheme	p. 17
Free-surface aeration in dam break waves: an experimental study	p. 25
New model investigations on two-phase chute flow	p. 33
Evaluation of incipient-aeration point on spillways	p. 43
Intakes and outlets
Air entrainment at Guri Dam intake operating at low heads	p. 53
3-D CFD modeling-investigation of potential vortex formation at the intakes of Caruachi Powerhouse	p. 61
Numerical unsteady flow model simulation during the sluice closure of Caruachi Dam	p. 69
Yacyreta Dam: spillways modification to reduce total dissolved gases concentrations downstream of the dam	p. 77
Hydromatrix: a new way to generate hydropower	p. 85
Hydrodynamic forces
Impulse waves from laboratory scale to mega-tsunamis	p. 93
Extreme wave transients in reservoirs, their characteristics and interaction with dams	p. 109
Dynamic pressure fluctuations at real-life plunge pool bottoms	p. 117
A new procedure to evaluate dynamic uplift of concrete linings or rock blocks in plunge pools	p. 125
Instantaneous pressure field on a submerged jump stilling basin	p. 133
Aspects of vibrations and fatigue of materials related to coherent structures of macroturbulent flows	p. 139
Scale effect on pressure fluctuations over sills in stilling basins	p. 147
Analysis of the air rubber dam using "ANSYS"	p. 157
Energy dissipators
Plunge pool scour in prototype and laboratory	p. 165
Experimental investigations on high-velocity jet characteristics and its influence on plunge pool rock scour	p. 173
Effect of sill arrangement on maximum scour depth DS of abruptly enlarged stilling basins	p. 181
Energy dissipation and hydrodynamic forces of aerated flow over macro-roughness linings for overtopped embankment dams	p. 189
Experimental study of energy loss at drops	p. 197
Dam safety: the use of guidance documents for the training of Inspecting Engineers	p. 205
Reservoir sedimentation
Impacts of Sanmenxia Dam and management strategies	p. 213
New approach in determining useful life of reservoirs	p. 229
The use of labyrinth weir in a reservoir flushing system	p. 237
Numerical and physical modelling concerning the removal of sediment deposits from reservoirs	p. 245
Application of fine sediment behavior to sedimentation management in Miwa Dam, Japan	p. 255
Management of reservoir sedimentation due to turbidity currents by technical measures	p. 263
Stepped spillways
Energy dissipation along stepped spillways	p. 273
Velocity and pressure field in skimming flow in stepped spillways	p. 279
Stepped spillways for embankment dams. Review, progress and development in overflow hydraulics	p. 287
River Structures
Scouring and sedimentation around structures
Recent views on the origin of river meandering and braiding	p. 297
Time-dependent local scour at piled bridge foundations	p. 305
Time evolution of scour at comparatively long abutments	p. 311
Local scour downstream of grade control structures	p. 319
Scouring profile at channel junction	p. 327
Numerical approaches in hydrodynamics of river flow
An improved implicit solution for the two dimensional shallow water equations using unstructured grids	p. 335
A fully mesh-less Lagrangian numerical method for prediction of free water surface	p. 345
Numerical study of flood routing in compound channels	p. 353
A finite volume method for solving SWE in rivers on complex topographies	p. 361
Application of a Boussinesq-type equation to flow over trapezoidal profile weirs	p. 369
Hydrodynamics of three-dimensional density currents	p. 377
River response to hydraulic structures
Experimental analysis on the hydraulic efficiency of mudflow breakers	p. 385
Sub-critical flow in open channel junction	p. 393
Boundary shear stress distribution in a V-shaped channel	p. 401
Hydroinformatic applications
Cardiff Bay barrage and managing the impounded water quality	p. 413
River flow forecasting using artificial neural networks	p. 425
Evaluation of the application of neural networks on real-time river flood prediction	p. 431
Prediction of salinity intrusion in Arvand River	p. 441
Author index	p. 449
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