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Source apportionment of suspended sediment using grain-size end-member analysis
Cunyong Zhang1, Zhaoyang Wang1, Ailing Jiang1
1School of Marine Technology and Geomatics, Jiangsu Ocean University, Lianyungang, 222005, China.
Marine Environmental Research
|March 17, 2023
Summary
End-members mixing analysis (EMMA) reveals three main sources for Haizhou Bay
Area of Science:
- Marine Geology
- Sedimentology
- Oceanography
Background:
- Understanding suspended sediment sources is crucial for coastal management.
- Haizhou Bay faces complex sediment dynamics influenced by multiple inputs.
Purpose of the Study:
- To determine the provenance and relative contributions of suspended sediment sources in Haizhou Bay.
- To apply end-members mixing analysis (EMMA) to grain-size distribution (GSD) data for source apportionment.
Main Methods:
- In situ suspended sediment grain-size distribution (GSD) data were collected from Haizhou Bay.
- End-members mixing analysis (EMMA) was employed to model the GSD data.
Main Results:
- Suspended sediment in Haizhou Bay is a mixture of three end-members: advection (41.92%), resuspension (37.83%), and riverine input (20.25%).
- End-member 1 is linked to the old Huanghe River delta, representing long-distance transported fine sediment.
- End-member 2 represents local sediment resuspension, and EM3 represents riverine suspended sediment.
Conclusions:
- EMMA is a feasible and effective method for identifying suspended sediment sources and mixing processes.
- Advection and resuspension are the dominant processes influencing suspended sediment composition in Haizhou Bay.
- Temporal variations in advection and resuspension significantly impact sediment source contributions.
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