Washover and Dune Interaction on a Barrier Island

Pulsing Flow in Steep Alluvial Streams
Channel bores observed in laboratory simulated floods in alluvial-bed channels resemble roll waves, but are apparently related to the existence and quasiperiodic breaking of trains of...

Beach and Dune Response to Hurricane Eloise of September 1975

Stability of Dunedin and Hurricane Passes, Florida

Sediment Inertia as Cause of River Antidunes
The formation of antidunes on riverbeds is explained in terms of sediment inertial effects. Due to inertia, bed sediment in transport cannot respond immediately to flow changes. To quantify...

Time Growth of Tidal Dunes in a Physical Model

Stochastic Analysis of Dune Bed Profiles
Application of stochastic models of bed-load transport and dispersion requires a knowledge of the probability distributions of the step lengths and the rest periods of the particles. The...

Temperature Effects in Flows over Nonplanar Beds
Laboratory results show that in flows over ripple and dune beds a 15-20°C increase in water temperature can affect significant changes in bed-load discharge, bed form and roughness. These...

Bagnold Approach and Bed-Form Development
The results of a laboratory investigation of the flow over a narrowly graded 0.49 mm sand are examined within the framework of Bagnold's Theory for the Flow of Cohesionless...

Determination of Kennedy's Parameter j for Dunes
The purpose of this note is to suggest a method for the evaluation of j when the sand waves are dunes and the flow is sufficiently tranquil....

Composite Beams in Torsion
Observations of flow resistance and bed-form dimensions were made for flow, over a narrowly graded sand, having a median diameter of 0.49 mm; the purpose of the narrow grading was to accentuate...

Statistical Properties of Missouri River Bed Forms
A logarithmic resistance relationship for flow near rough boundaries was formulated which relates bed form dimensions to flow resistance in large alluvial channels with dune beds. Bed...

Flow over Triangular Elements Simulating Dunes
A series of rigid triangular elements, placed on the bed of a laboratory flume, were used to simulate alluvial channel bed features which are large relative to the depth of flow. The study...

Tracer Studies of Sediment Transport Processes
Particles of various diameters and specific gravities were coated with fluorescent dyes and used as tracers to study the transport and dispersion of sand-size particles for the flat-bed...

Height of Sand Dunes in Open Channel Flows
Starting from the hydraulic model first proposed by Exner, equations have been deduced for maximum height of sand dunes in open channel flows using kinematic and dynamic approaches. The...

Formation of Dunes and Antidunes in Open Channels
The formation of dunes and antidunes on the erodible bed of an open channel is studied analytically as a problem of stability of the erodible bed. The phase lag existing between the local...

Filtration of Chlorella through Dune-Sand
In order to study processes when effluents from stabilization ponds are used for artificial recharge using suspensions of algae (Chlorella) and a long column filled with dune sand. For...

Instability of Flat Bed in Alluvial Channels
The occurrence of different bed forms has been considered as an instability in the flat bed flow. A general functional relationship has been developed for the instability of flat bed when...

Alluvial Channel Resistance Related to Bed Form
Existing data from flume tests over ripple or dune beds are used to investigate the variation of resistance to flow with shear velocity. Lines plotted to represent points at constant depth...

Analysis of Resistance in Fluvial Channel
The variation of friction factor in fluvial channels in terms of the governing principles is examined and related to the bed forms. Laboratory measurements show that local surface drag...

 

 

 

 

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