›› 2011, Vol. 32 ›› Issue (S1): 290-0296.

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

Discrepancy of sediment erodibility variation under waves at Yellow River delta

ZHENG Jie-wen1, 2, JIA Yong-gang1, 2, LIU Xiao-lei1, 2, SHAN Hong-xian1, 2, YANG Zhong-nian1, 2   

  1. 1. Environmental Geotechnical Engineering Institute, College of Environmental Science and Engineering, Ocean University of China, Qingdao, Shandong 266003, China; 2. Key Laboratory of Marine Environment & Ecology, Ministry of Education, Ocean University of China, Qingdao, Shandong 266003, China
  • Received:2010-12-14 Online:2011-05-15 Published:2011-05-16

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Abstract: Two typical study areas (Chezigou fishing village subjected to serious erosion process and Huanghe Haigang remaining in the balanced state between erosion and siltation) were selected to conduct a series of experiments including wave-loading simulations, flume erosion tests and geotechnical tests aiming at studying the erosional characteristic evolution of fine sediment in the process of wave loading actions and exploring the evolutional mechanism. It is demonstrated that the sediment erodibility at Chezigou fishing village study area is widely higher than that at Huanghe Haigang both in the absence of wave action and weak wave conditions; however, with a more evident downward trend under wave loading due to the more significant liquefaction characteristics of fine soils in Chezigou fishing village, which can contribute to the serious coastal erosion this study area subjects to. Additionally, basing on the analysis of the sedimentation data and particle composition of the fine sediments in the two study areas, the reworking of wave loading to transport fine particles of the bottom sediment upward accelerates the coarsening process of seabed sediment, which promotes the evolution of sediment erodibility of fine soils in coastal areas.

Key words: wave loading, critical shear stress, threshold velocity, physico-mechanical properties, soil liquefaction

CLC Number: 

  • TU 411
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