Sediment carrying capacity and sediment flux of nearshore water-sediment interface

Zheng Jun; Li Ruijie; Yu Yonghai

doi:10.3969/j.issn.0253-4193.2014.05.015

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Zheng Jun, Li Ruijie, Yu Yonghai. Sediment carrying capacity and sediment flux of nearshore water-sediment interface[J]. Haiyang Xuebao, 2014, 36(5): 136-141. doi: 10.3969/j.issn.0253-4193.2014.05.015

Citation:

Zheng Jun, Li Ruijie, Yu Yonghai. Sediment carrying capacity and sediment flux of nearshore water-sediment interface[J]. Haiyang Xuebao, 2014, 36(5): 136-141. doi: 10.3969/j.issn.0253-4193.2014.05.015

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Sediment carrying capacity and sediment flux of nearshore water-sediment interface

doi: 10.3969/j.issn.0253-4193.2014.05.015

1.
Key Laboratory of Sea-field Management Techniques, State Oceanic Administration, National Marine Environmental Monitoring Center, Dalian 116023, China;National Marine Environment Monitoring Center, Dalian 116023, China
2.
Key Laboratory of Coastal Disaster and Defence, Ministry of Education, Hohai University, Nanjing 210098, China

Received Date: 2013-03-07
Rev Recd Date: 2013-07-06

Abstract

Abstract

In nearshore waters,the spatial and temporal scales of waves,tides current and circulation have great difference. It is difficult to combine these factors' effects to predict the transport of sediment. This paper proposed a concept of ocean waves significant velocity,which combine the effects of wave,tide and ocean current by the horizontal kinetic energy superposition principle. Through comparing the relation between shear stress at the water-sediment interface and sediment carrying capacity,with the condition of equilibrium of sediment flux,a new formula of sediment carrying capacity which connected to the ocean waves significant velocity is derived. The sediment carrying capacity is related to the critical velocity that is increased with the water depth and reduced with the relative roughness. Finally,the field data of 30 observation stations and 590 simulation data have been used to verify this paper's formula. The results show that the new formula is good agreement with the field and simulation data. The formula of sediment carrying capacity could be used to simulate the nearshore sediment transport.
- sediment carrying capacity,
- sediment flux,
- water-sediment interface,
- coastal area,
- ocean waves significant velocity

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