TY - JOUR
T1 - Processes of initiation of motion leading to bedload transport in gravel-bed rivers
AU - Garcia, Celso
AU - Cohen, Hai
AU - Reid, Ian
AU - Rovira, Albert
AU - Úbeda, Xavier
AU - Laronne, Jonathan B.
PY - 2007/3/28
Y1 - 2007/3/28
N2 - Transport processes that lead to the initiation of bedload motion in gravel-bed rivers have not yet been clarified. We report patch- and grain-scale processes involved in the initiation of bedload motion in a natural gravel-bed stream as observed through a series of video experiments. With increasing flow strength, the phases of initiation of motion that have been identified are (1) within-patch grain instability (grain vibration, pivoting, and grain-scale rolling), (2) within-patch gyratory step-and-rest motion, and (3) general sediment motion involving downstream transport from an individual patch and the throughput of grains inherited from upstream.
AB - Transport processes that lead to the initiation of bedload motion in gravel-bed rivers have not yet been clarified. We report patch- and grain-scale processes involved in the initiation of bedload motion in a natural gravel-bed stream as observed through a series of video experiments. With increasing flow strength, the phases of initiation of motion that have been identified are (1) within-patch grain instability (grain vibration, pivoting, and grain-scale rolling), (2) within-patch gyratory step-and-rest motion, and (3) general sediment motion involving downstream transport from an individual patch and the throughput of grains inherited from upstream.
UR - http://www.scopus.com/inward/record.url?scp=34249873297&partnerID=8YFLogxK
U2 - 10.1029/2006GL028865
DO - 10.1029/2006GL028865
M3 - Article
AN - SCOPUS:34249873297
SN - 0094-8276
VL - 34
JO - Geophysical Research Letters
JF - Geophysical Research Letters
IS - 6
M1 - L06403
ER -