TY - JOUR
T1 - Cyclical variability of suspended sediment concentration over a low-energy tidal flat in Jiaozhou Bay, China
T2 - Effect of shoaling on wave impact
AU - Yang, S. L.
AU - Li, P.
AU - Gao, A.
AU - Zhang, J.
AU - Zhang, W. X.
AU - Li, M.
PY - 2007/10
Y1 - 2007/10
N2 - During the spring-neap period of 17-24 August 2004, turbidity, horizontal and vertical current velocities and echo intensity were measured using OBS-3A and ADP-XR instruments over an intertidal flat within the semi-enclosed Jiaozhou Bay, China, to examine patterns in suspended sediment concentration (SSC) and possible control factors. SSC was found to be lower than 30 mg l-1 in most of the water column and for most of the tidal cycle. This is attributed mainly to the low hydrodynamic energy, in particular weak currents (near-bottom maximum 1- and 8-min-interval velocities were only 26.1 and 14.2 cm s-1, respectively), and limited fine-grained sediment supply by rivers. However, high SSC values ranging from 100 to >1,000 mg l-1 occurred over short periods at the beginning and the end of inundation. This phenomenon is attributed to the shoaling effect of frequent wind-generated waves, as a result of which near-bottom SSC fluctuations display a U-shaped trend during each tidal cycle.
AB - During the spring-neap period of 17-24 August 2004, turbidity, horizontal and vertical current velocities and echo intensity were measured using OBS-3A and ADP-XR instruments over an intertidal flat within the semi-enclosed Jiaozhou Bay, China, to examine patterns in suspended sediment concentration (SSC) and possible control factors. SSC was found to be lower than 30 mg l-1 in most of the water column and for most of the tidal cycle. This is attributed mainly to the low hydrodynamic energy, in particular weak currents (near-bottom maximum 1- and 8-min-interval velocities were only 26.1 and 14.2 cm s-1, respectively), and limited fine-grained sediment supply by rivers. However, high SSC values ranging from 100 to >1,000 mg l-1 occurred over short periods at the beginning and the end of inundation. This phenomenon is attributed to the shoaling effect of frequent wind-generated waves, as a result of which near-bottom SSC fluctuations display a U-shaped trend during each tidal cycle.
UR - https://www.scopus.com/pages/publications/34548764328
U2 - 10.1007/s00367-007-0058-2
DO - 10.1007/s00367-007-0058-2
M3 - 文章
AN - SCOPUS:34548764328
SN - 0276-0460
VL - 27
SP - 345
EP - 353
JO - Geo-Marine Letters
JF - Geo-Marine Letters
IS - 5
ER -