The significance of seabed reflection coefficient derived from high frequency seismic data to marine sedimentary environment

3rd International Conference on Energy Engineering and Environmental Protection

能源学;生态环境科学

Zheng, Jianglong^1^2^3 ; Xu, Jiang^2^3 ; Tong, Siyou^1 ; Li, Haidong^2^3 ; Hu, Yi^2^3

Ocean University of China, Qingdao

266100, China^1

Third Institute of Oceanography, State Oceanic Administration, Xiamen

361005, China^2

Xiamen Ocean Engineering Exploration and Design Institute, Xiamen

361005, China^3

关键词: Coarse particles;    Convolution model;    Geological sampling;    High frequency HF;    High frequency signals;    Reflection intensity;    Sedimentary environment;    Sound pressure level;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/227/6/062016/pdf
DOI  :  10.1088/1755-1315/227/6/062016

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

In this paper, the physical and practical significance of seabed reflection coefficient are studied based on the seismic convolution model, which reveals that high frequency signal is sensitive to the acoustic impedance changing. Then based on the seismic data acquired in the west coast of Taiwan Strait used for case study, the seabed reflection coefficient is calculated in the light of sound pressure level and seabed reflected wave. In comparison with the results of geological sampling and analysis, the overall trend of fine particles correspond to lower reflection coefficient and coarse particles correspond to greater reflection coefficient. In addition, the abnormal values of the calculated reflection coefficient could indicate some abnormal phenomena at or near the seabed, which could also be identified from the seismic profile. In brief, the seabed reflection coefficient derived from high frequency seismic data could be used for studying the modern marine sedimentary environment. The reflection intensity might be a good indicator of hydrodynamics of sedimentation.