Harbor subbottom evaluation using high resolution seismic techniques

The use of geophysics, in particular reflection seismThe use of geophysics, in particular reflection seismology, in harbor subbottom evaluation is not new. What is relatively new is the precision and high resolution that can be obtained with state-of-the-art transducers and data recording systems. When coupled with calibration borings at selected locations and precision positioning and bathymetry, an accurate 3-dimensional picture of the subbottom can often be obtained that is far more complete than can be obtained from borings alone, and at a lower cost. The purpose of this paper is to review the tools and procedures used by one group, BBN Geomarine, in performing harbor and other nearshore engineering geophysical surveys.ology, in harbor subbottom evaluation is not new. What is relatively new is the precision and high resolution that can be obtained with state-of-the-art transducers and data recording systems. When coupled with calibration borings at selected locations and precision positioning and bathymetry, an accurate 3-dimensional picture of the subbottom can often be obtained that is far more complete than can be obtained from borings alone, and at a lower cost. The purpose of this paper is to review the tools and procedures used by one group, BBN Geomarine, in performing harbor and other nearshore engineering geophysical surveys.