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HY-1C Coastal Zone Imager observations of the suspended sediment content distribution details in the sea area near Hong Kong-Zhuhai-Macao Bridge in China

文献类型： 外文期刊

作者： Cai, Lina 1 ; Zhou, Minrui 1 ; Yan, Xiaojun 1 ; Liu, Jianqiang 2 ; Ji, Qiyan 1 ; Chen, Yuxiang 3 ; Zuo, Juncheng 4 ;

作者机构： 1.Zhejiang Ocean Univ, Marine Sci & Technol Coll, Zhoushan 316004, Peoples R China

2.Minist Nat Resources, Key Lab Space Ocean Remote Sensing & Applicat, Beijing 100081, Peoples R China

3.Chinese Acad Fishery Sci, South China Sea Fisheries Res Inst, Guangzhou 510300, Peoples R China

4.Shanghai Ocean Univ, Coll Marine Sci, Shanghai 201306, Peoples R China

关键词： HY-1C Coastal Zone Imager (CZI); Hong Kong-Zhuhai-Macao Bridge; suspended sediment content; Zhujiang River Estuary

期刊名称：ACTA OCEANOLOGICA SINICA （ 影响因子：1.369； 五年影响因子：1.467 ）

ISSN： 0253-505X

年卷期： 2022 年 41 卷 11 期

页码：

收录情况： SCI

摘要： The impacts of the Hong Kong-Zhuhai-Macao Bridge (HKZMB) on suspended sediment content (SSC) were analysed in the Zhujiang River Estuary based on data from HY-1C, which was launched in September 2018 in China, carrying Coastal Zone Imager (CZI) and Chinese Ocean Color and Temperature Scanner on it. A new SSC inversion model was established based on the relationship between in-situ SSC and the remote sensing reflectance in red and near-infrared bands of CZI image. HY-1C satellite data obtained from October to December 2019 were applied to retrieve SSC in the Zhujiang River Estuary. The results show that SSC around the HKZMB is ranging from 20 mg/L to 95 mg/L. SSC change obviously on two sides of the bridge. During flooding and ebbing period, SSC increases obviously downstream of the bridge. SSC difference between upstream and downstream is ranging from 5 mg/L to 20 mg/L. Currents flowing across the HKZMB, the change trend of SSC in most places upstream and downstream is almost the same that SSC downstream of the bridge is higher than SSC upstream. The tidal currents interact with bridge piers, inducing vortexes downstream, leading the sediment to re-suspend downstream of the bridge piers. Other factors, including seafloor topography and wind, can also contribute to the distribution of SSC in the Zhujiang River Estuary.

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