Accession Number:

ADA610157

Title:

Sediment Acoustics

Descriptive Note:

Annual rept

Corporate Author:

COLUMBIA UNIV PALISADES NY LAMONT-DOHERTY EARTH OBSERVATORY

Personal Author(s):

Report Date:

2000-09-30

Pagination or Media Count:

5.0

Abstract:

The long-term goal of my work in sediment acoustics is to develop a physically meaningful model to describe geoacoustic wave propagation in marine sediments on the basis of a set of primitive physical variables. The principal scientific objective of my work has been to develop a mathematical model that is able to predict wave velocity and attenuation in the sediments found near the seafloor. Specifically, the model has been designed to accept as input parameters certain fundamental primitive variables, such as grain size, porosity, grain density and gas content that are directly related to the geological processes producing the wide range of sediments that are encountered in the worlds oceans. A number of auxiliary technological objectives have also arisen in the course of our work related to remote sensing and in-situ measurement of sediment geoacoustic properties. One of these objectives has been to develop a set of tools that allow the measurement of velocity and attenuation as well as certain related geotechnical variables such as shear strength in the sediment column. These measurements provide the ground truth for assessing the validity and usefulness of the basic geoacoustic model.

Subject Categories:

  • Physical and Dynamic Oceanography
  • Geology, Geochemistry and Mineralogy
  • Numerical Mathematics
  • Acoustics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE