Accession Number:

ADA591750

Title:

Coastal Structure Underwater Inspection Technologies

Descriptive Note:

Technical note

Corporate Author:

COASTAL ENGINEERING RESEARCH CENTER VICKSBURG MS

Personal Author(s):

Report Date:

1996-12-01

Pagination or Media Count:

9.0

Abstract:

To introduce multibeam sonar technology for use in performing high-resolution, quantitative surveys of coastal structures. Much of the damage to coastal structures, especially rubble-mound breakwaters and jetties, occurs to the underwater portion of the structure. Underwater damage such as scour, settlement, and scattering and breakage of armor units is not often exhibited on the surface, and damage can progress until a major structural collapse occurs. Detection of underwater damage and deterioration is cost-effective for coastal engineers in terms of planning for structure repairs and rehabilitation, and management of coastal structures over their lifetimes. Using divers for underwater inspection or surveys of coastal structures is often dcult and risky because of the normal occurrence of waves and currents and limited underwater visibility around the structure. Information from diver surveys is subjective and spatial detail is sparse. Side-scan sonars SSS were investigated and proved as a viable tool for structural surveys Kucharski and Clausner 1990. Although SSS surveys provide good spatial coverage, the results are semi-quantitative and often distorted because of energetic wave and current conditions around the structure.

Subject Categories:

  • Physical and Dynamic Oceanography
  • Geography
  • Test Facilities, Equipment and Methods

Distribution Statement:

APPROVED FOR PUBLIC RELEASE