NDLI: Assessing the sediment volume contribution to scattering: bulk density fluctuations

Content Provider	IEEE Xplore Digital Library
Author	Briggs, K.B. Tang, D.
Copyright Year	2002
Description	Author affiliation: Naval Res. Lab., Stennis Space Center, MS, USA (Briggs, K.B.)
Abstract	The accuracy and resolution of sediment bulk density measurements are examined. Bulk density from cores is traditionally measured by weight loss of extruded and sectioned 2-cm-thick sediment disks. The actual bulk density is thus an average value for the volume of a 2-cm-long-x-cross-sectional-area sediment core disk. Thus, the values of the measurements as well as the estimates of the correlation lengths may be a function of the disk thickness (sampling interval) and estimation of correlation lengths may be distorted. From a bulk density power spectrum and correlation length estimated from existing data, Monte Carlo realizations of the density were obtained for the sediment volume. From such realizations, we re-applied the same procedures used in the actual core analysis on the simulated cores to obtain a "virtual" bulk density profile and then re-estimated the power spectrum. Because actual density is known from the original data in the simulation, the difference between the parameters used to generate the simulation and the "virtual" parameters is a measure of the distortion. As a result of numerous simulations run to achieve a robust estimate of "virtual" bulk density, we show that laboratory procedures bias (lower) the actual variance of the parameters by averaging or smoothing. In related work, however, the first-order autoregressive approach for estimating correlation length from contiguous disks indicates a bias toward a higher value of the parameter than is appropriate.
Starting Page	2093
Ending Page	2097
File Size	303501
Page Count	5
File Format	PDF
ISBN	0780375343
DOI	10.1109/OCEANS.2002.1191954
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2002-10-29
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Sediments Scattering Fluctuations Density measurement Distortion measurement Loss measurement Weight measurement Length measurement Thickness measurement Sampling methods
Content Type	Text
Resource Type	Article

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

Acoustic return from density fluctuations in turbulent jets

An accurate pipe length measurement using an acoustic sensor

Comparative Sensitivity Of Bioassays For Assessing Sediment Toxicity In Puget Sound

A modified light weight piston corer for sampling soft lake sediment

Sampling volume probed by frequency-domain photon migration measurements

On Algorithmic Rate-Distortion Function

Determination of Thickness of the Sediments in a Rectangular Pipe by Modal Frequencies' Shift

Calibration of the collective scattering system on NSTX

Applications of bottom backscattering theories to experiments

Assessing the sediment volume contribution to scattering: bulk density fluctuations

Similar Documents

Acoustic return from density fluctuations in turbulent jets

An accurate pipe length measurement using an acoustic sensor

Comparative Sensitivity Of Bioassays For Assessing Sediment Toxicity In Puget Sound

A modified light weight piston corer for sampling soft lake sediment

Sampling volume probed by frequency-domain photon migration measurements

On Algorithmic Rate-Distortion Function

Determination of Thickness of the Sediments in a Rectangular Pipe by Modal Frequencies' Shift

Calibration of the collective scattering system on NSTX

Applications of bottom backscattering theories to experiments

Assessing the sediment volume contribution to scattering: bulk density fluctuations