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Flow and Velocity Data

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Frequently-anticipated questions:

What does this data set describe?

Title: Flow and Velocity Data
Velocity data are being provided in an Access database and Excel spreadsheets. The database summarizes the velocity data, site location and description, vegetative characteristics, and water quality parameters. The spreadsheet filters and averages the complete raw velocity data set per measurement.

These data were collected at two minute intervals for 10 minutes.

The file naming convention is as follows: (example) E07T31197.xls

Column 1: E or W East or west from Taylor Slough Airboat Trail Column 2-3: Sequential numbers from the center of the transect Column 4-5: Sequential transect number Column 6-9: Month and Year data was collected

Supplemental_Information: This project ended in 1999.
  1. How should this data set be cited?

    Ray Schaffranek (retired) Marvin A. Franklin (retired), 1999, Flow and Velocity Data.

    Online Links:

  2. What geographic area does the data set cover?

    West_Bounding_Coordinate: -80.9
    East_Bounding_Coordinate: -80.5
    North_Bounding_Coordinate: 25.5
    South_Bounding_Coordinate: 25.25

  3. What does it look like?

  4. Does the data set describe conditions during a particular time period?

    Beginning_Date: Jul-1997
    Ending_Date: Jul-1998
    Currentness_Reference: ground condition

  5. What is the general form of this data set?

  6. How does the data set represent geographic features?

    1. How are geographic features stored in the data set?

      This is a Point data set. It contains the following vector data types (SDTS terminology):

      • Point (134)

    2. What coordinate system is used to represent geographic features?

      Horizontal positions are specified in geographic coordinates, that is, latitude and longitude. Latitudes are given to the nearest 0.001. Longitudes are given to the nearest 0.001. Latitude and longitude values are specified in Decimal degrees.

      The horizontal datum used is North American Datum of 1983.
      The ellipsoid used is Geodetic Reference System 80.
      The semi-major axis of the ellipsoid used is 6378137.
      The flattening of the ellipsoid used is 1/298.257.

  7. How does the data set describe geographic features?

Who produced the data set?

  1. Who are the originators of the data set? (may include formal authors, digital compilers, and editors)

    • Ray Schaffranek (retired)

  2. Who also contributed to the data set?

    Velocity data and cross section data was collected by Paul Meadows, Darlene Blum, Mark Stephens, Greg Donley, Kenny Kalan, Don Goin, Gina Tillis, Eric Swain, John Pittman, Alex Gallagher, James Dubuisson, Harry Jenter, and Lavetra Sloan.

  3. To whom should users address questions about the data?

    Dan Nowacki
    U.S. Geological Survey
    430 National Center
    Reston, VA 20192

    703 648-5467 (voice)

Why was the data set created?

The objective of the project is to make the best possible estimate of the flow velocities and water depths across Buttonwood Embankment during high flow for use as model input for an ongoing project being conducted in the USGS-WRD office in Miami. Estimates will be used to provide management alternatives and will create salinity concentrations suitable for ecologic integrity.

How was the data set created?

  1. From what previous works were the data drawn?

  2. How were the data generated, processed, and modified?

    Date: 2001 (process 1 of 1)
    The data-collection effort consisted of measurements of depth and velocity at about 80 sites along Buttonwood Embankment suspected to flow during high flow periods. A newly available, sensitive, low velocity meter was used to measure the velocity; standard sounding techniques were used to determine the depth; and a very high resolution Global Positioning System (GPS) was used to determine the location.

    An initial reconnaissance was made in October 1996 to examine established locations where flow over the embankment will most likely occur. A total of four complete measurements were conducted, starting as soon as flow over the embankment began during the summer of 1997. Data were collected in July, September, and November 1997 and periodically during the 1998 water year.

    Person who carried out this activity:

    Dan Nowacki
    U.S. Geological Survey
    430 National Center
    Reston, VA 20192

    703 648-5467 (voice)

  3. What similar or related data should the user be aware of?

    Tillis, G. M., 2001, Measuring Taylor Slough boundary and internal flows, Everglades National Park, Florida: USGS Open-File Report 01-225, U.S. Geological Survey, Tallahassee, FL.

    Online Links:

How reliable are the data; what problems remain in the data set?

  1. How well have the observations been checked?

  2. How accurate are the geographic locations?

    locations determined using a very high resolution GPS

  3. How accurate are the heights or depths?

  4. Where are the gaps in the data? What is missing?

    data for some points and dates are not available.

  5. How consistent are the relationships among the observations, including topology?

    not applicable

How can someone get a copy of the data set?

Are there legal restrictions on access or use of the data?

Access_Constraints: none
Use_Constraints: none

  1. Who distributes the data set? (Distributor 1 of 1)

    Heather S.Henkel
    U.S. Geological Survey
    600 Fourth St. South
    St. Petersburg, FL 33701

    727 803-8747 ext 3028 (voice)
    727 803-2030 (FAX)

  2. What's the catalog number I need to order this data set?

    flow and velocity data

  3. What legal disclaimers am I supposed to read?

    The data have no explicit or implied guarantees.

  4. How can I download or order the data?

Who wrote the metadata?

Last modified: 30-Apr-2007
Metadata author:
Heather Henkel
U.S. Geological Survey
600 Fourth Street South
St. Petersburg, FL 33701

727 803-8747 ext 3028 (voice)
727 803-2030 (FAX)

Metadata standard:
Content Standard for Digital Geospatial Metadata (FGDC-STD-001-1998)

This page is <https://sofia.usgs.gov/metadata/sflwww/flow_velocity_data.faq.html>

U.S. Department of the Interior, U.S. Geological Survey, Center for Coastal Geology
Comments and suggestions? Contact: Heather Henkel - Webmaster
Generated by mp version 2.8.18 on Mon Apr 30 11:13:13 2007