Accession Number:

ADA523809

Title:

High-Resolution Mapping and Backscatter Studies in Support of the Ripples DRI

Descriptive Note:

Research rept.

Corporate Author:

NEW HAMPSHIRE UNIV DURHAM CENTER FOR COASTAL AND OCEAN MAPPING (CCOM)

Report Date:

2006-01-01

Pagination or Media Count:

10.0

Abstract:

The long-term goal of the RIPPLES DRI is to develop the ability to predict the geometry and evolution of seafloor morphology and in particular the presence or absence of ripples which have been shown to affect the sub-seafloor penetration of acoustic energy. Specific goals are to 1 Measure and model ripple morphology and gradients on scales ranging up to kilometers 2 Understand the response of ripples to changes in wave and wave-current forcing 3 Measure and model rates of biological degradation or production of seafloor morphology 4 Measure and model effects of a distribution of grain-scale properties e.g. size, density, cohesion on ripple morphology and 5 Understand the role of ripples in generating surface and subsurface sedimentary structures. In support of these long-term goals, the UNH-CCOM team has conducted ultra high-resolution, multifrequency, multibeam mapping program in order to 1 Establish the overall morphological context in the area of the RIPPLES DRISAX04 experiment bathymetry and acoustic backscatter 2 Establish the detailed distribution of ripples and other small-scale features throughout the experimental area, before the start of the experiment, immediately after deployment of the sensors, and at intervals during the experiment 3 Explore techniques for using the backscatter recorded by the multibeam sonar as a means to remotely identify seafloor properties including acoustic parameters, grain-size and biological components.

Subject Categories:

  • Physical and Dynamic Oceanography
  • Acoustic Detection and Detectors
  • Acoustics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE