Incipient Motion Experiment of Sediment in Silty-Sand Coast

Abstract:

Sediment issues, especially the channel siltation issues in silty-sand Coast are becoming more and more prominent as the development of harbor construction in silty-sand coasts. In order to learn the incipient motion characteristics under influence of wave, current and wave-current combination of sediment in silty-sand coasts, provide necessary parameters for engineering analysis of fluvial process and mathematical model analysis, and then provide science and technology fundamentals for harbor construction, experiments are carried out with samples from the under construction Haiyanghong port area in Dandong. Under the same condition, when the initial sediment density, which is of great influence on incipient motion, is larger, the incipient motion is harder to occur; and wave is the main hydrodynamic force to devote to sediment incipient motion. Generally, sediment in silty-sand coasts shows the characteristic of silt. However, fine sediment rises obviously in the experiment and the water gets muddy very easily as the existence of a certain amount of clay.

• Periodical: Applied Mechanics and Materials (Volume 737)
• Pages: 758-761
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.737.758
• Online since: March 2015
• Authors: Rui Bo Zhang, Xin Li, Qi Xiu Pang
• Keywords: Critical Shear Stress, Incipient Motion Experiment, Incipient Wave Height, Silty-Sand Coast, Wave-Current Combination

References

[1] Xu Hongming, Zhang Qinghe, Experiment Study of Sediment Characteristics in Silty-sand Coast, Journal of Sediment Research, No. 3, (2000).

[2] Mai Miao, Pang Qixiu, Zhang Ruibo, etc. , Analysis Report for Coastal Evolution and Siltation Trend of Haiyanghong Port Area of Dandong Harbor, Technical Report of Tianjin Research Institute for Water Transport and Engineering, M.O.T., China(2010).

[3] Cao Zude, Yang Shusen, Yang Hua, Definition of silty-sandy beach and its characteristics of sediment movement, Port & Waterway Engineering, No. 1, (2009).

[4] Yang Hua, Study on definition of muddy coast and silty coast, Journal of Waterway and Harbor, Vol. 29(3), (2008).

[5] Sediment Professional Committee of Chinese Hydraulic Engineering Society, Sediment Manual, China Environmental Press, Beijing, (1992).

[6] Cao Zude, Kong Lingshuang, Jiao Guiying, Sediment Movement Under the Effect of Periodic Reciprocating Current, Journal of Waterway and Harbor, Vol. 26(1), (2005).

[7] Dou Guoren, Incipient Motion of Coarse and Fine Sediment, Journal of Sediment Research, Vol. 6, (1999).

[8] Zhao Zidan, Initiation of Sediment Movement under Wave Action, Marine Science Bulletin, Vol. 2(1), (1983).

[9] Cao Zude, Kong Lingshuang, Jiao Guiying, Initiation of Sediment Movement for a Wave-current Coexistent System, Acta Oceanologica Sinica, Vol. 25(3), (2003).

[10] He Wenshe, Cao Shuyou, Liu Xingnian, etc., Critical Shear Stress of Incipient Motion of Sediment, Vol. 35(3), (2003).

[11] Pang Qixiu, Bai Yuchuan, etc., Critical Stress Profile for incipient sediment motion on muddy shoals, Advances in Water Science, Vol. 23(2), (2012).