contact with the ground surface, under conditions where the forces exerted by the
fluid do not allow a lift of particles. Creeping particles along the ground through
small jumps might eventually splash and eject much smaller particles.
There have been few studies of creep and little is known about this type of
motion, due to the extreme difficulty of direct observation of particle movements
close to the ground (e.g., Cheng et al. 2012).
Fig. 6.14 Saltation cycles showing lift-up and trajectories of particles (from Mitha et al. 1986)
Fig. 6.15 Modalities of suspension, saltation, and creep of sand particle wind transport (from
https://en.wikipedia.org/wiki/Saltation_(geology))
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219
fluid do not allow a lift of particles. Creeping particles along the ground through
small jumps might eventually splash and eject much smaller particles.
There have been few studies of creep and little is known about this type of
motion, due to the extreme difficulty of direct observation of particle movements
close to the ground (e.g., Cheng et al. 2012).
Fig. 6.14 Saltation cycles showing lift-up and trajectories of particles (from Mitha et al. 1986)
Fig. 6.15 Modalities of suspension, saltation, and creep of sand particle wind transport (from
https://en.wikipedia.org/wiki/Saltation_(geology))
6.5 Mass Transfer
219