Results 101 to 110 of about 107,957 (205)

A Continuum Saltation Model for Sand Dunes

, 2001
We derive a phenomenological continuum saltation model for aeolian sand transport that can serve as an efficient tool for geomorphological applications.
A. Mehta, B. B. Willetts, B. R. White, B. T. Werner, F. K. Wippermann, F. Rioual, G. F. S. Wiggs, G. Sauermann, Gerd Sauermann, Hans J. Herrmann, I. K. McEwan, J. E. Ungar, J. M. T. Stam, J. P. Bouchaud, J. P. Bouchaud, K. Lettau, K. Pye, Klaus Kroy, M. R. Raupach, M. Sørensen, M. Sørensen, P. M. van Dijk, P. Nalpanis, P. R. Owen, R. A. Bagnold, R. A. Bagnold, R. B. Hoyle, R. B. Hoyle, R. R. McDonald, R. S. Anderson, R. S. Anderson   +30 more
core   +1 more source

The apparent roughness of a sand surface blown by wind from an analytical model of saltation

, 2012
We present an analytical model of aeolian sand transport. The model quantifies the momentum transfer from the wind to the transported sand by providing expressions for the thickness of the saltation layer and the apparent surface roughness.
, Bagnold R A, Durán O, H J Herrmann, J F Kok, Julien P Y, Keulegan G H, Kok J F Parteli E J R Michaels T I Karam D B, Leal L G, Nikuradse J, Nikuradse J, Prandtl L, T Pähtz   +12 more
core   +1 more source

Estimating Local Bed Shear Stress from Velocity Observations

Water Resources Research, 1996
Replicate velocity observations using conventional equipment under typical field conditions are used to evaluate the precision of different methods for estimating local boundary shear stress from velocity measurements. The bed shear velocity u* can be estimated within 3% using the depth‐averaged velocity in the vertically averaged logarithmic velocity ...
openaire   +4 more sources

Bed shear stress coefficient within the surf zone

, 1977
An analytical formulation of the bed shear stress coefficient inside the surf zone is derived using the concept of radiation stress. A truncated Rayleigh p.d.f. is used to describe the wave field inside the surf zone and provides the input to calculate the variation of wave energy and longshore current as a function of wave height, water depth and ...
openaire   +4 more sources

Turbulence structure and near-wall suppression in equilibrium and nonequilibrium sediment transport: An experimental study

International Journal of Sediment Research
Sediment transport in open channels plays a significant role in shaping turbulent flow structures, influencing sediment dynamics and flow resistance. Transport regimes are classified into equilibrium, where sediment inflow and outflow are balanced, and ...
Bambang Agus Kironoto, Miskar Maini, Adam Pamudji Rahardjo, Istiarto   +3 more
doaj   +1 more source

Numerical Study on Hydrodynamic Force and Wave Induced Vortex Dynamics around Cylindrical Pile

International Journal of Coastal and Offshore Engineering, 2018
Three-dimensional numerical simulation of regular waves passing over cylindrical monopile has been conducted to investigate the hydrodynamic force and vortex dynamics. To do so, the rectangular wave flume and monopile is modeled on a solver; available in
Mohammad Mohammad Beigi Kasvaei, Mohammad Hossein Kazeminezhad, Abbas Yeganeh-Bakhtiary   +2 more
doaj  

Kelp-stone ratio and bed roughness control green gravel stability under hydrodynamic forces. [PDF]

PLoS One
Paul M, Kerpen NB, Moghimi A.
europepmc   +1 more source

Full-lifecycle catastrophic evolution mechanisms of red-bed translational landslides. [PDF]

iScience
Zhou H, Zhou H, Zhou S, Zheng D, Wu S, Li A.   +5 more
europepmc   +1 more source

Dynamic characteristics of frozen ballast beds in cold-region railways under cyclic train loading. [PDF]

Sci Rep
Liu J, Cao Y, Chen A, Qi W, Kou L, Sysyn M.   +5 more
europepmc   +1 more source

Boulder concentration effects on sediment transport and deposition. [PDF]

Sci Rep
Teng P, Nilsson DA, Andersson AG, Hellström JGI.   +3 more
europepmc   +1 more source