TIDAL FLAT SEDIMENT CHARACTERISTICS AND TRANSPORT TRENDS ALONG THE NORTHERN BANK OF HANGZHOU BAY

WANG Hua-qiang; GAO Shu

Marine Geology & Quaternary Geology > 2007 > 27(6): 25-30.

WANG Hua-qiang, GAO Shu. TIDAL FLAT SEDIMENT CHARACTERISTICS AND TRANSPORT TRENDS ALONG THE NORTHERN BANK OF HANGZHOU BAY[J]. Marine Geology & Quaternary Geology, 2007, 27(6): 25-30.

Citation:

WANG Hua-qiang, GAO Shu. TIDAL FLAT SEDIMENT CHARACTERISTICS AND TRANSPORT TRENDS ALONG THE NORTHERN BANK OF HANGZHOU BAY[J]. Marine Geology & Quaternary Geology, 2007, 27(6): 25-30.

Citation:

WANG Hua-qiang, GAO Shu. TIDAL FLAT SEDIMENT CHARACTERISTICS AND TRANSPORT TRENDS ALONG THE NORTHERN BANK OF HANGZHOU BAY[J]. Marine Geology & Quaternary Geology, 2007, 27(6): 25-30.

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TIDAL FLAT SEDIMENT CHARACTERISTICS AND TRANSPORT TRENDS ALONG THE NORTHERN BANK OF HANGZHOU BAY

Ministry of Education Key Laboratory for Coast and Island Development, Nanjing University, Nanjing 210093, China

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Received Date: September 20, 2007
Revised Date: November 19, 2007

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Abstract

Abstract

During November 2004, surficial sediment samples were collected from the upper part of the tidal flat on the northern bank of Hangzhou Bay. Grain size analysis of the samples, using a Mastersize2000 layer particle sizer, shows that the major constituent of the sediment is silt, with the mean grain size mainly between 5 and 6.5 Φ. The other grain size parameters, i.e. sorting coefficient, skewness and kurtosis, are indicative of the deposit formed in a high energy tidal environment. The sediment is poorly sorted and positively skewed, with a broad kurtosis.Results from the Gao-Collins model for grain size trend analysis show that the sediment transport is directed to west near Haiyan and Luchao Port, but to east between Zhapu and Tuolin. Compared with the residual current patterns in the adjacent waters, the transport trend along the northern bank has the same direction as the residual current. This agreement is related to the inherent relationship between suspended sediment transport and residual currents in this estuarine system, which provides suspended sedimentary materials to the tidal flat.
- fine-grained sediment,
- tidal flats,
- grain size trend analysis,
- residual currents,
- Hangzhou Bay

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References

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TIDAL FLAT SEDIMENT CHARACTERISTICS AND TRANSPORT TRENDS ALONG THE NORTHERN BANK OF HANGZHOU BAY