TY - JOUR
T1 - Experimental research on unstable movements of sandbars under wave actions
AU - Yin, Jing
AU - Zou, Zhi-li
AU - Dong, Ping
AU - Zhang, Hai-fei
AU - Wu, Guo-qiang
AU - Pan, Yi-nan
N1 - Copyright 2012 Elsevier B.V., All rights reserved.
PY - 2012
Y1 - 2012
N2 - This study is motivated by recognition of complex sandbar evolution patterns under wave actions inside the surf zone. A series of physical model experiments were conducted in a wave flume to investigate sandbar migration under various wave conditions, including wave groups, regular waves, and random waves. It was observed that under certain wave conditions sandbars move alternately shoreward and seaward rather than continuously in the same direction. The measurements show that the unstable movement of sandbars is closely related to the amplitude modulation of waves. Smaller amplitude modulation tends to produce more intense unstable bar movements. Data analysis further shows that the sandbar migration does not seem to be a passive response of the sea bed to wave forcing, but is most likely caused by the feedback interaction between waves and bed topography.
AB - This study is motivated by recognition of complex sandbar evolution patterns under wave actions inside the surf zone. A series of physical model experiments were conducted in a wave flume to investigate sandbar migration under various wave conditions, including wave groups, regular waves, and random waves. It was observed that under certain wave conditions sandbars move alternately shoreward and seaward rather than continuously in the same direction. The measurements show that the unstable movement of sandbars is closely related to the amplitude modulation of waves. Smaller amplitude modulation tends to produce more intense unstable bar movements. Data analysis further shows that the sandbar migration does not seem to be a passive response of the sea bed to wave forcing, but is most likely caused by the feedback interaction between waves and bed topography.
UR - http://www.scopus.com/inward/record.url?scp=84864572375&partnerID=8YFLogxK
U2 - 10.3882/j.issn.1674-2370.2012.02.006
DO - 10.3882/j.issn.1674-2370.2012.02.006
M3 - Article
AN - SCOPUS:84864572375
SN - 1674-2370
VL - 5
SP - 175
EP - 190
JO - Water Science and Engineering
JF - Water Science and Engineering
IS - 2
ER -