中国东南近海海底沉积物声学物理性质及其相关关系

Acoustic-physical properties of seafloor sediments from nearshore southeast China and their correlations

在获得的数据资料基础上,发现了中国东南近海海底沉积物声学物理参数的平面分布规律,通过对这些参数的回归分析以及对声速和沉积物密度的估计,建立了经验公式。结果显示,中国东南近海海底沉积物的基本声学物理特性如下:沉积物类型多样而且复杂,从黏土到砂砾有13个颗粒组分组合;沉积物物理力学参数变化范围较大;沉积物声学性质相对于附近海域的数据变化范围更大。这些都与海底沉积环境、沉积物来源、沉积条件和沉积作用过程有关。该项研究有助于建立海底地声模型及开展应用。

On the basis of historical data and literature, the planar distributions of the acoustic and physical parameters of seafloor sediments in the offshore southeast China are studied, some empirical formulas are set up by regression analysis, and the sound velocities and the densities of the seafloor sediments are evaluated. The results show that the sediments can be divided into 13 types from clay to gravel, and their physical and mechanical parameters are greatly different; compared with the surrounding sea areas, the acoustic parameters of the seafloor sediments in the offshore southeast China have even larger variance ranges, which is related to the sedimentary environment, sediment source and sedimentary process of the sea areas.