Sediment transport mechanism in the Zhejiang inner continental shelf in summer

Chen Bin; Gao Fei; Liu Jian

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Chen Bin, Gao Fei, Liu Jian. Sediment transport mechanism in the Zhejiang inner continental shelf in summer[J]. Haiyang Xuebao, 2017, 39(3): 96-105.

Citation:

Chen Bin, Gao Fei, Liu Jian. Sediment transport mechanism in the Zhejiang inner continental shelf in summer[J]. Haiyang Xuebao, 2017, 39(3): 96-105.

Chen Bin, Gao Fei, Liu Jian. Sediment transport mechanism in the Zhejiang inner continental shelf in summer[J]. Haiyang Xuebao, 2017, 39(3): 96-105.

Citation:

Chen Bin, Gao Fei, Liu Jian. Sediment transport mechanism in the Zhejiang inner continental shelf in summer[J]. Haiyang Xuebao, 2017, 39(3): 96-105.

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Sediment transport mechanism in the Zhejiang inner continental shelf in summer

Key Laboratory of Marine Hydrocarbon Resources and Environmental Geology, Ministry of Land and Resources, Qingdao Institute of Marine Geology, China Geological Survey, Qingdao 266071, China;Laboratory for Marine Geology, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266061, China

Received Date: 2016-05-22

Abstract

Abstract

Based on the measured data and information about tidal current, suspended sediment concentration, surface sediment samples the Zhejiang inner continental shelf in summer, 2014. Material flux decomposition method and Geo-Collins grain size trend analysis was carried out to delineate suspended sediment flux,transport direction and dynamics mechanism and net sediment transport patterns of the study area. The results indicate that the suspended sediment concentration decreases from west to east, increases from south to north, which is well related with tidal current and oscillated with the frequency of semidiurnal tide as well. The suspended sediment flux quickly decreases towards the sea. The net suspended sediment transport is mainly controlled by average current transport, and the second place is gravitational circulation transport. The suspended sediments are primarily transported towards the sea, but in deeper than 30 m water region, under the influence of the Taiwan Warm Current, transport towards northeast direction is found in the study area. The Taiwan Warm Current would also probably block the suspended sediment diffusion towards the sea. Grain size trend analysis result indicates that surface sediments are mostly transported from northeast towards southwest, under the influence of currents and morphology, a weaken trend sedimentary region is founded in the middle study area. The net suspended sediment is estimated at about 1.9×10⁶ t per day with the tide condition in summer, and transports towards northeast.
- sediment transport,
- tidal current,
- residual current,
- sediment flux,
- grain size trends analysis

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References(27)

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