Flow and Velocity Data

Frequently-anticipated questions:

• What does this data set describe?
  1. How should this data set be cited?
  2. What geographic area does the data set cover?
  3. What does it look like?
  4. Does the data set describe conditions during a particular time period?
  5. What is the general form of this data set?
  6. How does the data set represent geographic features?
  7. How does the data set describe geographic features?
• Who produced the data set?
  1. Who are the originators of the data set?
  2. Who also contributed to the data set?
  3. To whom should users address questions about the data?
• Why was the data set created?
• How was the data set created?
  1. From what previous works were the data drawn?
  2. How were the data generated, processed, and modified?
  3. What similar or related data should the user be aware of?
• 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?
  3. How accurate are the heights or depths?
  4. Where are the gaps in the data? What is missing?
  5. How consistent are the relationships among the data, including topology?
• How can someone get a copy of the data set?
  1. Are there legal restrictions on access or use of the data?
  2. Who distributes the data?
  3. What's the catalog number I need to order this data set?
  4. What legal disclaimers am I supposed to read?
  5. How can I download or order the data?
• Who wrote the metadata?

What does this data set describe?

1. How should this data set be cited?

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

   Online Links:

   • <http://sofia.usgs.gov/projects/flow_velocity/>

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
   USA
   

   703 648-5467 (voice)
   dnowacki@usgs.gov
   

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
   USA
   

   703 648-5467 (voice)
   dnowacki@usgs.gov
   

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:

   • <http://fl.water.usgs.gov/Abstracts/ofr01_225_tillis.html>

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
   USA
   

   727 803-8747 ext 3028 (voice)
   727 803-2030 (FAX)
   hhenkel@usgs.gov
   

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?
   • Availability in digital form:

     Data format:	There are Excel spreadsheets for the Taylor Slough sites, Transects One, Two, Three, and Four, C-111 Transect, Stationary Transect, and Culverts. in format Excel spreadsheets Size: 12
     Network links:	<http://sofia.usgs.gov/exchange/franklin/franklinflow.html>

     Data format:	The database contains the data for the Taylor Slough sites. in format Access 2000 Size: 5.5
     Network links:	<http://sofia.usgs.gov/exchange/franklin/franklinflow.html>

     Data format:	html Size: 0.6
     Network links:	<http://sofia.usgs.gov/exchange/franklin/franklinflow.html>

   • Cost to order the data: none

Who wrote the metadata?

Dates:

Last modified: 30-Apr-2007

Metadata author:

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

727 803-8747 ext 3028 (voice)
727 803-2030 (FAX)
sofia-metadata@usgs.gov

Metadata standard:

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

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