Accession Number:

AD0724674

Title:

Ocean Engineering Significance of Marine Seismic Reflection Profiling Technology.

Descriptive Note:

Final rept. Jul 69-May 70,

Corporate Author:

NAVAL CIVIL ENGINEERING LAB PORT HUENEME CALIF

Personal Author(s):

Report Date:

1971-05-01

Pagination or Media Count:

51.0

Abstract:

Seismic Reflection Profiling SRP data of value to the seafloor engineer include 1 sediment soil thickness, 2 sediment structure, 3 the slope of the bedrock beneath the sediment layer, 4 bedrock topography, if sufficient tracklines are run to permit contouring, 5 bedrock structure, if penetration permits, and 6 acoustical data from which certain physical, engineering, and load bearing properties of an area can be approximated. Qualitative interpretations of acoustical data are made as a matter of course by the experienced analyzer of SRP records and include such parameters as 1 echo intensity from the seafloor and subbottom interfaces, indicating hard high reflectivity and soft low reflectivity layers, 2 penetrability of the seafloor in unconsolidated sediments is generally inversely proportional to grain size, 3 point return, or discrete hyperbolic echo returns, indicative of large irregularities compared to the sound frequency recorded, such as boulder beds, or a weathered bedrock surface. Author

Subject Categories:

  • Physical and Dynamic Oceanography

Distribution Statement:

APPROVED FOR PUBLIC RELEASE