Accession Number:

ADA317747

Title:

Geoacoustic Study of Delaware Main Channel.

Descriptive Note:

Final rept.,

Corporate Author:

ARMY ENGINEER WATERWAYS EXPERIMENT STATION VICKSBURG MS HYDRAULICS LAB

Personal Author(s):

Report Date:

1996-08-01

Pagination or Media Count:

395.0

Abstract:

An acoustic subbottom profiling study has been performed along the center line of the Delaware River Main Channel from the Ben Franklin Bridge in Philadelphia, PA, to the entrance of the ship channel near the east end of Delaware Bay for the purpose of identifying sediment units within areas scheduled for dredging. The work was performed by the U.S. Army Engineer Waterways Experiment Station in support of the U.S. Army Engineer District, Philadelphias Delaware River Main Channel Preconstruction and Engineering Design Study. The study is focused on deepening of the Delaware River Main Channel from 40 to 45 ft. The specific objective was to quantify the bottom and subbottom sediments in terms of in situ density and soil type to a depth of about 20 ft, where possible, below the bottom of the existing ship channel. Only a single profile line was requested to be surveyed down the center line of the channel. Data from 29 vibracores collected were correlated with 800- and 3,500-Hz acoustic reflection data using acoustic impedance to develop a geoacoustic model of the study area. Results are in the form of sediment profiles presenting the major reflection faces with descriptions of the engineering properties of the sediments and acoustically derived density versus depth plots herein referred to as Acoustic Cores.

Subject Categories:

  • Geology, Geochemistry and Mineralogy
  • Hydrology, Limnology and Potamology

Distribution Statement:

APPROVED FOR PUBLIC RELEASE