Application of Multi-channel Ultra-high Resolution Seismic in Hong Kong: a Brief Introduction

Synopsis:

It is always crucial to understand the geological condition of seabed for sites selections, optimizing foundation designs, and mitigating potential geological hazards in offshore projects. In addition to geotechnical investigations, geophysical surveys including seismic reflection are widely adopted to understand the shallow geology in Hong Kong waters. Traditional seismic reflection survey consists of a seismic source and single-channel receivers. As the seismic waves penetrate through the subsurface, they are partially reflected at major geological interfaces due to the contrasts in acoustic impedance. The reflected waves are then picked up by the receiver. Geological profiles are subsequently produced by calculating the depths of each stratum based on the recorded travel time of seismic waves and their velocities. With a demand for increasing survey penetration depth and resolution in Hong Kong, the multichannel ultra-high resolution seismic (MUHRS) method could be used. This method offers more reliable and precise results to the…