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Dataset Overview | National Centers for Environmental Information (NCEI)

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)

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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.
  • 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].
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Distributor NOAA National Centers for Environmental Information
+1-301-713-3277
NCEI.Info@noaa.gov
Dataset Point of Contact NOAA National Centers for Environmental Information
ncei.info@noaa.gov
Time Period 2022-04-21 to 2022-05-01
Spatial Bounding Box Coordinates
West: -90.380757
East: -90.380757
South: 29.577382
North: 29.577382
Spatial Coverage Map
General Documentation
Publication Dates
  • publication: 2023-02-14
Data Presentation Form Digital table - digital representation of facts or figures systematically displayed, especially in columns
Dataset Progress Status Complete - production of the data has been completed
Historical archive - data has been stored in an offline storage facility
Data Update Frequency As needed
Supplemental Information
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.
Purpose 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.
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  • accessLevel: Public
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Dataset Citation
  • 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].
Cited Authors
Principal Investigators
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Acknowledgments
  • Funding Agency: Restore Act Louisiana Center of Excellence
Theme keywords NODC DATA TYPES THESAURUS NODC OBSERVATION TYPES THESAURUS WMO_CategoryCode
  • oceanography
Global Change Master Directory (GCMD) Science Keywords Provider Keywords
  • Along-channel velocity 0.4 m above bed
  • Total Suspended Sediment 0.4 m above bed
Data Center keywords NODC SUBMITTING INSTITUTION NAMES THESAURUS
Instrument keywords NODC INSTRUMENT TYPES THESAURUS Global Change Master Directory (GCMD) Instrument Keywords
Place keywords NODC SEA AREA NAMES THESAURUS Global Change Master Directory (GCMD) Location Keywords
Project keywords Provider Project Names
  • QUANTIFYING MARSH EDGE ERODIBILITY AS A FUNCTION OF SALINITY AND WATER CHEMISTRY, AND ASSESSING POSSIBLE EFFECTS OF THE GULF INTRACOASTAL WATERWAY IN BARATARIA BAY
Send2NCEI Submission Package ID
  • 73T472
Keywords NCEI ACCESSION NUMBER
Use Constraints
  • 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].
Access Constraints
  • 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.
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Lineage information for: dataset
Processing Steps
  • 2023-02-14T20:05:26Z - NCEI Accession 0276517 v1.1 was published.
Output Datasets
Lineage information for: dataset
Processing Steps
  • 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.
Acquisition Information (collection)
Instrument
  • Acoustic Doppler Velocimeter (ADV)
  • pressure sensor
Last Modified: 2024-09-10T14:12:39Z
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