gov.noaa.nodc:0276517 eng utf8 dataset NOAA National Centers for Environmental Information ncei.info@noaa.gov https://www.ncei.noaa.gov/contact HTTPS NOAA Contact Information Information for contacts at NCEI. information custodian 2025-09-15T14:31:51Z ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data ISO 19115-2:2009(E) Along-channel velocity and calculated total suspended sediment measurements using an acoustic doppler velocimeter (ADV) in the Gulf Intracoastal Waterway at Larose, Louisiana from 2022-04-21 to 2022-05-01 (NCEI Accession 0276517) 2023-02-14 publication 2023-02-03 creation NOAA National Centers for Environmental Information gov.noaa.nodc:0276517 NCEI Archive Management System 0276517 NOAA National Centers for Environmental Information ncei.info@noaa.gov https://www.ncei.noaa.gov/contact HTTPS NCEI Contact Information Information for contacts at NCEI. information publisher Giulio Mariotti Louisiana State University (LSU) resourceProvider Louisiana State University (LSU) resourceProvider Giulio Mariotti Louisiana State University (LSU) principalInvestigator Mariotti, Giulio Louisiana State University author Boswell, Kyrsten Louisiana State University author tableDigital An acoustic doppler velocimeter (ADV) was deployed in the Gulf Intracoastal Waterway (GIWW) near Larose (LA) using a 6000 kHz Nortek Acoustic Doppler Velocimeter (ADV). The cross section is about 75 m wide, with a depth of ~4.5 m toward the center and ~4 m toward the side. The instrument was deployed about 3 m from the bank, where the water depth is about 4 m. The three-dimensional velocity was recorded 0.4 m above the bed. Both the 3-dimensional velocity and the backscatter was recorded continuously at a frequency of 8 Hz. In post-processing, data were converted into bursts of 16 seconds, which were then averaged to give a single measurement per burst. The backscatter signal-to-noise ratio (S) [dB] was converted to TSS [mg/l] using a laboratory-calibrated formula (TSS=10^(0.052S+0.04). A text file of the calculated TSS (mg/l) and along channel velocity (m/s) at depth is provided along with a .hdr that describes the headers of each file provided, a .dat that describes the data configuration from the instrument, and a .sen file that describes the instrument set up. Ship traffic can increase sediment resuspension in shallow channels and coastal areas. Here we show that ship-driven resuspension is the major morphodynamic agent in the Gulf Intracoastal Waterway (GIWW), a 4-5 m deep and 60-150 m wide navigational channel located in the Mississippi Delta (Louisiana, USA). Single ship passage increases total suspended sediment (TSS) from the background value of ~20 mg/l to peaks of 100-400 mg/l, which then decay exponentially within an e-folding time of about 8 minutes. Resuspension is mainly driven by barge traffic, and it is associated with the primary wave (Bernoulli drawdown) rather than the short waves in the Kelvin wake. Sediment resuspension is strongly correlated to the maximum velocity of the primary wave (up to 0.8 m/s), whose magnitude is mainly controlled by the barge draft and hence by the barge load. When averaged over time, ship traffic (~10 loaded barges per day) increases the mean TSS to about 50 mg/l, i.e., double the background value. We suggest that this resuspension explain how the GIWW can transport sediment over ~150 km – from the Atchafalaya River to Barataria Basin – despite relatively low advection velocity (~0.1 m/s). More generally, we suggest that ship traffic in confined channels, as opposed to channels bordering tidal flats, facilitates sediment bypass and should reduce in-channel sedimentation. Funding Agency: Restore Act Louisiana Center of Excellence completed historicalArchive NOAA National Centers for Environmental Information ncei.info@noaa.gov https://www.ncei.noaa.gov/contact HTTPS NCEI Contact Information Information for contacts at NCEI. information pointOfContact asNeeded https://www.ncei.noaa.gov/access/metadata/landing-page/bin/gfx?id=gov.noaa.nodc:0276517 Preview graphic PNG 0276517 NCEI ACCESSION NUMBER 2023-01-30 publication SOUND VELOCITY suspended solids WATER DEPTH - AVERAGE theme NODC DATA TYPES THESAURUS Acoustic Doppler Velocimeter (ADV) pressure sensor instrument NODC INSTRUMENT TYPES THESAURUS in situ theme NODC OBSERVATION TYPES THESAURUS Louisiana State University dataCentre NODC SUBMITTING INSTITUTION NAMES THESAURUS Coastal Waters of Louisiana place NODC SEA AREA NAMES THESAURUS oceanography theme WMO_CategoryCode 2012-09-15 publication QUANTIFYING MARSH EDGE ERODIBILITY AS A FUNCTION OF SALINITY AND WATER CHEMISTRY, AND ASSESSING POSSIBLE EFFECTS OF THE GULF INTRACOASTAL WATERWAY IN BARATARIA BAY project Provider Project Names EARTH SCIENCE > OCEANS > BATHYMETRY/SEAFLOOR TOPOGRAPHY > WATER DEPTH EARTH SCIENCE > OCEANS > OCEAN ACOUSTICS > ACOUSTIC VELOCITY EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > SUSPENDED SOLIDS theme Global Change Master Directory (GCMD) Science Keywords 2026 revision 24 Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA) Greenbelt MD https://forum.earthdata.nasa.gov/app.php/tag/GCMD%2BKeywords HTTPS GCMD Keyword Forum Page Global Change Master Directory (GCMD). 2025. GCMD Keywords, Version 21. Greenbelt, MD: Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA). URL (GCMD Keyword Forum Page): https://forum.earthdata.nasa.gov/app.php/tag/GCMD+Keywords information custodian Along-channel velocity 0.4 m above bed Total Suspended Sediment 0.4 m above bed theme Provider Keywords PRESSURE SENSORS > PRESSURE SENSORS instrument Global Change Master Directory (GCMD) Instrument Keywords 2026 revision 24 Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA) Greenbelt MD https://forum.earthdata.nasa.gov/app.php/tag/GCMD%2BKeywords HTTPS GCMD Keyword Forum Page Global Change Master Directory (GCMD). 2025. GCMD Keywords, Version 21. Greenbelt, MD: Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA). URL (GCMD Keyword Forum Page): https://forum.earthdata.nasa.gov/app.php/tag/GCMD+Keywords information custodian OCEAN > ATLANTIC OCEAN > NORTH ATLANTIC OCEAN > GULF OF AMERICA OCEAN > ATLANTIC OCEAN > NORTH ATLANTIC OCEAN > GULF OF MEXICO place Global Change Master Directory (GCMD) Location Keywords 2026 revision 24 Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA) Greenbelt MD https://forum.earthdata.nasa.gov/app.php/tag/GCMD%2BKeywords HTTPS GCMD Keyword Forum Page Global Change Master Directory (GCMD). 2025. GCMD Keywords, Version 21. Greenbelt, MD: Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA). URL (GCMD Keyword Forum Page): https://forum.earthdata.nasa.gov/app.php/tag/GCMD+Keywords information custodian 73T472 Send2NCEI Submission Package ID accessLevel: public otherRestrictions Cite as: Mariotti, Giulio; Boswell, Kyrsten (2023). Along-channel velocity and calculated total suspended sediment measurements using an acoustic doppler velocimeter (ADV) in the Gulf Intracoastal Waterway at Larose, Louisiana from 2022-04-21 to 2022-05-01 (NCEI Accession 0276517). [indicate subset used]. NOAA National Centers for Environmental Information. Dataset. https://www.ncei.noaa.gov/archive/accession/0276517. Accessed [date]. Distribution liability: NOAA and NCEI make no warranty, expressed or implied, regarding these data, nor does the fact of distribution constitute such a warranty. NOAA and NCEI cannot assume liability for any damages caused by any errors or omissions in these data. If appropriate, NCEI can only certify that the data it distributes are an authentic copy of the records that were accepted for inclusion in the NCEI archives. otherRestrictions Use liability: NOAA and NCEI cannot provide any warranty as to the accuracy, reliability, or completeness of furnished data. Users assume responsibility to determine the usability of these data. The user is responsible for the results of any application of this data for other than its intended purpose. eng; USA utf8 environment oceans -90.380757 -90.380757 29.577382 29.577382 2022-04-21 2022-05-01 These files (GIWW318.VEC, GIWW318.vhd, GIWW318.pck) are mentioned in the .HDR file provided but were not provided to NCEI and therefore are not in this archive. 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You may copy and paste the FTP link to the data into an FTP client (e.g., FileZilla or WinSCP). download dataset NCEI Accession 0276517 v1.1 was published. 2023-02-14T20:05:26Z NCEI Accession 0276517 v1.1 publication https://www.ncei.noaa.gov/archive/accession/0276517/1.1 HTTPS NCEI Accession 0276517 v1.1 published 2023-02-14T20:05:26Z download dataset Parameter or Variable: Along-channel velocity 0.4 m above bed (measured); Units: m/s; Observation Category: in situ; Sampling Instrument: Acoustic Doppler Velocimeter (ADV); Sampling and Analyzing Method: ADV, measuring 0.4 m above the bed. Parameter or Variable: Total Suspended Sediment 0.4 m above bed (measured); Units: mg/l; Observation Category: in situ; Sampling Instrument: Acoustic Doppler Velocimeter (ADV); Sampling and Analyzing Method: Converted from backscatter signal to noise using the formula S=10^(0.052S+0.04) Parameter or Variable: WATER DEPTH - AVERAGE (measured); Units: /mille; Observation Category: in situ; Sampling Instrument: pressure sensor asNeeded Metadata are developed, maintained and distributed by NCEI. Updates are performed as needed to maintain currentness. NOAA National Centers for Environmental Information custodian Acoustic Doppler Velocimeter (ADV) Acoustic Doppler Velocimeter (ADV) High-resolution acoustic instruments to study rapid 3D velocity fluctuations ADVs have three or more focused beams to measure with high sampling rates in a small point. They work by sending out a short acoustic pulse from the transmit element. When the pulse travels through the focus point for the receiver beams, the echo is recorded in each of the acoustic receiver elements. The echo is then processed to find the Doppler shift, the scaling is adjusted with the measured speed of sound in the liquid (hence the temperature measurement), and the velocity vector is recorded or transmitted to a PC at a rapid rate. http://www.nortek-as.com/en/products/velocimeters pressure sensor pressure sensor GCMD instruments - In Situ/Laboratory Instruments > Pressure/Height Meters > PRESSURE SENSORS ASFA Thesaurus - pressure sensors http://www4.fao.org/asfa/asfa.htm