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Tidal and seasonal asymmetry of suspended sediment concentration in branched channels of the Changjiang River Estuary
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Lixin Qiao1, Guoan Zhang1, *, Qing He1, Weiguo Zhang1, Maotian Li1
Haiyang Xuebao | 2020, 42(3) : 107 - 117
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Haiyang Xuebao | 2020, 42(3): 107-117
• Marine Geology •
Tidal and seasonal asymmetry of suspended sediment concentration in branched channels of the Changjiang River Estuary
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Lixin Qiao1, Guoan Zhang1, *, Qing He1, Weiguo Zhang1, Maotian Li1
Affiliations
  • 1 State Key Laboratory of Estuarine and Coastal Research, East China Normal University, Shanghai 200241, China
Published: 2020-03-25 doi: 10.3969/j.issn.0253-4193.2020.03.010
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Due to the influence of runoff and estuarine morphology, asymmetrical phenomena of hydrodynamics, suspended sediment concentration (SSC) and salinity occurs between the flooding and ebbing stage in the estuary. Such a phenomena also shows significant regional and seasonal differences. Based on hydrological survey in July 2013 and January 2014 in the Changjiang River Estuary, it is found that suspended sediment concentration in the branched channels of the Changjiang River Estuary has asymmetric characteristics, which varies with flood and dry season as well as spring and neap tide. In terms of spatial variability, there exists along channel difference, inter-channel difference as well as water colume difference. The evolution of the estuary controlls the overall SSC difference between the North Branch and South Branch. The flood and dry seasons affect the redistribution process of SSC in the estuary. Spring tides has a stronger impact on SSC asymmetry than that of neap tides. Theseasonal wave condition affect the SSC asymmetric distribution in the turbidity maximum zone of the estuary along the north-south direction. The high sediment concentration near the bottom contributes significantly to the SSC asymmetry between flooding and ebbing stages at the river mouth.

branched estuary  /  channel  /  suspended sediment concentration  /  flood-ebb asymmetry  /  seasonal difference
Lixin Qiao, Guoan Zhang, Qing He, Weiguo Zhang, Maotian Li. Tidal and seasonal asymmetry of suspended sediment concentration in branched channels of the Changjiang River Estuary[J]. Haiyang Xuebao, 2020 , 42 (3) : 107 -117 . DOI: 10.3969/j.issn.0253-4193.2020.03.010
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doi: 10.3969/j.issn.0253-4193.2020.03.010
  • Receive Date：2019-02-13
  • Online Date：2026-03-26
  • Published：2020-03-25
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  • Received：2019-02-13
  • Revised：2019-03-13
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    1 State Key Laboratory of Estuarine and Coastal Research, East China Normal University, Shanghai 200241, China
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https://castjournals.cast.org.cn/joweb/hyxb/EN/10.3969/j.issn.0253-4193.2020.03.010
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表12种不同金属材料的力学参数
科
Family		 属数
Number of
genus		 种数
Number of
species		 占总种数比例
Percentage of
total species (%)		 属
Genus		 种数
Number of
species		 占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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