Journal of Geographical Sciences

, Volume 13, Issue 4, pp 498–506 | Cite as

Temporal and spatial changes of suspended sediment concentration and resuspension in the Yangtze River estuary

Sediment-water Interaction

Abstract

A detailed analysis of suspended sediment concentration (SSC) variations over a year period is presented using the data from 8 stations in the Yangtze River estuary and its adjacent waters, together with a discussion of the hydrodynamic regimes of the estuary. Spatially, the SSC from Xuliujing downwards to Hangzhou Bay increases almost constantly, and the suspended sediment in the inner estuary shows higher concentration in summer than in winter, while in the outer estuary it shows higher concentration in winter than in summer, and the magnitude is greater in the outer estuary than in the inner estuary, greater in the Hangzhou Bay than in the Yangtze River estuary. The sediments discharged by the Yangtze River into the sea are resuspended by marine dynamics included tidal currents and wind waves. Temporally, the SSC shows a pronounced neap-spring tidal cycle and seasonal variations. Furthermore, through the analysis of dynamic mechanism, it is concluded that wave and tidal current are two predominant factors of sediment resuspension and control the distribution and changes of SSC, in which tidal currents control neap-spring tidal cycles, and wind waves control seasonal variations. The ratio between river discharge and marine dynamics controls spatial distribution of SSC.

Key words

suspended sediment concentration temporal and spatial changes sediment resuspension Yangtze River estuary 

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. Cao Peikui, Gu Guochuan, Dong Yongfaet al., 1989. Basic characteristics of sediment transport in Hangzhou Bay. In: Chen Jiyuet al., Developments and Evolution of China’s Coast. Shanghai: Shanghai Science and Technology Press, 108–119. (in Chinese)Google Scholar
  2. Chen Jiyu, Chen Shenliang, Ding Pingxinget al., 2001. Sediment transport along the Nanhui submerged spit of the Yangtze estuary.Resources and Environment in the Yangtze Basin, 10(2): 166–172. (in Chinese)Google Scholar
  3. Chen Jiyu, Zhu Huifang, Dong Yongfaet al., 1985. Development of the Changjiang Estuary and its submerged delta.Continental Shelf Research, 4(1-2): 47–56.CrossRefGoogle Scholar
  4. Chen Shenliang, 2001. Seasonal, neap-spring variations of sediment concentration in the joint area between Yangtze Estuary and Hangzhou Bay.Science in China (Series B), 44(supp.): 57–62.CrossRefGoogle Scholar
  5. Chen Shenliang, Gu Guochuan, 2000. Modeling suspended sediment concentrations in the mouth of Hangzhou Bay.Journal of Sediment Research, 5: 45–50. (in Chinese)Google Scholar
  6. Gao Jin, 1998. The evolutional rule of Changjiang river mouth and hydrodynamic effect.Acta Geographica Sinica, 53(3): 264–269. (in Chinese)Google Scholar
  7. Gu Guochuan, 1986. Characteristics of distribution of suspended sediment in the offshore water body of Yangtze estuary.Journal of East Sea, 4(1): 15–24. (in Chinese)Google Scholar
  8. He Qing, Yun Caixing, 1998. Preliminary study on transportation and distribution of sediment load in the Yangtze estuary.International Journal of Sediment Research, 13(4): 59–69.Google Scholar
  9. Huang Zhongshu, 1983. Spectrum Analysis and Its Application in Hydrometeorology. Beijing: Meteorological Press. (in Chinese)Google Scholar
  10. Li Jiufa, He Qing, Zhang Cheng, 2000. A study on sediment deposition and resuspension in the mouth bar area of the Changjiang River estuary.Oceanologica et Limnologica Sinica, 31(1): 101–109. (in Chinese)Google Scholar
  11. Shen Huanting, Pan Dingan, 2001. Turbidity Maximum in the Changjiang Estuary. Beijing: Ocean Press, 15–60. (in Chinese)Google Scholar
  12. Su Jilan, Wang Kangshan, 1986. The suspended sediment balance in Changjiang Estuary.Estuarine, Coastal and Shelf Science, 23: 81–98.CrossRefGoogle Scholar
  13. Webster T, Lemckert C, 2002. Sediment resuspension within a microtidal estuary/embayment and the implication to channel management.Journal of Coastal Research, SI36: 753–756.Google Scholar
  14. Yang Shilun, 1999. Tidal wetland sedimentation in the Yangtze Delta.Journal of Coastal Research, 15(4): 1091–1099.Google Scholar
  15. Yun Caixing, Cai Mengyi, Wang Baoquan, 1981. Application of satellite images to analyze the diffusion of suspended sediment in Yangtze estuary.Oceanologica et Limnologica Sinica, 12(5): 391–401. (in Chinese)Google Scholar
  16. Zhou Jifu, Wang Tao, Li Jiachunet al., 1999. Influence of runoff and tide on sediment transport in the Changjiang estuary.Journal of Hydrodynamics (Series A), 14(1): 90–100. (in Chinese)Google Scholar
  17. Zhang Jing, Yang Zuosheng, Shi Maochong, 1999. Suspended sediment regime in the Huanghe River estuary and south Bohai Sea. In: Zhang Jing (ed.), Land-Sea Interaction in Chinese Coastal Zones. Beijing: Ocean Press, 23–43.Google Scholar
  18. Zhang Guoan, Yu Zhiying, Yun Caixinget al., 2003. Primary analysis of sediment motion before and after 1st phase engineering of the deep waterways in Changjiang estuary.Journal of Sediment Research. (in Chinese)Google Scholar

Copyright information

© Springer 2003

Authors and Affiliations

  1. 1.State Key Laboratory of Estuarine and Coastal ResearchEast China Normal UniversityShanghaiChina

Personalised recommendations