期刊名称：IOP Conference Series: Earth and Environmental Science
印刷版ISSN：1755-1307
电子版ISSN：1755-1315
出版年度：2019
卷号：310
期号：4
页码：1-6
DOI：10.1088/1755-1315/310/4/042045
出版社：IOP Publishing
摘要：To have an insight of the effects of salt wedge on suspended sediment concentration (SSC), we carried out experiments of intruding salt wedge in flume with fresh turbid water of non-cohesive particles and salt water free of sediment. Two sets of Acoustic Doppler Velocity Profiler (ADVP) were used to record instantaneous velocity profiles in the saline affected zone near the bed. The acoustic back scattered signal amplitudes (AMP) in the measurements were used to estimate SSC at the same point and the same time. The results show that around the interface shear of exchange flow is remarkable and SSC increases noticeably. Flow analysis indicates that large scale turbulence from interfacial instability is the main power source to enhance sediment carrying capacity of the flow. It weakens and retards the particles in the upper turbid layer sinking to the lower saline zone. However, the energy dissipation doesn't show much change.
