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Water Quality Physical Parameters Data (Lietz)

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Frequently-anticipated questions:

What does this data set describe?

Title: Water Quality Physical Parameters Data (Lietz)
The data set contains values for water temperature, pH, specific conductance, dissolved oxygen, sample location cross section, and sampling depth at 5 sites.

The sites are: Biscayne Canal at S-28 Little River Canal at S-27 Miami Canal at S-26 Snapper Creek Canal at S-22 Tamiami Canal at S-25B

Supplemental_Information: This project was completed on September 30, 1999.
  1. How should this data set be cited?

    Arthur C. Lietz (retired), 2001, Water Quality Physical Parameters Data (Lietz).

    Online Links:

  2. What geographic area does the data set cover?

    West_Bounding_Coordinate: -80.431
    East_Bounding_Coordinate: -80.18
    North_Bounding_Coordinate: 25.933
    South_Bounding_Coordinate: 25.66

  3. What does it look like?

    <https://sofia.usgs.gov/exchange/lietz/locationphy.html> (GIF)
    location of data collection sites

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

    Beginning_Date: 21-Jun-1996
    Ending_Date: 07-Oct-1997
    Currentness_Reference: ground condition

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

    Geospatial_Data_Presentation_Form: text files

  6. How does the data set represent geographic features?

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

      Indirect_Spatial_Reference: East Coast canals
      This is a Point data set. It contains the following vector data types (SDTS terminology):
      • Point (5)

    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 0.1. Longitudes are given to the nearest 0.1. 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?

    Parameters collected at each site include water temperature, pH, specific conductance, dissolved oxygen, sample location cross section (or distance from left bank), and sampling depth.
    Entity_and_Attribute_Detail_Citation: USGS personnel

Who produced the data set?

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

    • Arthur C. Lietz (retired)

  2. Who also contributed to the data set?

    Frank Panellas, student civil engineer, John Goebel and Elizabeth Debiak, hydrologic technicians

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

    Michael Byrne
    U.S. Geologcial Survey
    1400 Colonial Blvd.

    Suite 70, Royal Palm Square
    Fort Myers, FL 33907

    239 275-8448 ext. 10 (voice)
    239 275-6820 (FAX)

Why was the data set created?

A vital component in ecosystem restoration is the understanding of prerestoration water quality. The health of Biscayne Bay has been threatened by nutrient-laden discharges from the east coast canal system resulting from urbanization and agricultural activities. Extensive changes to the current water management system in order to restore natural historic hydropatterns to the Everglades potentially may affect the Biscayne Bay ecosystem. This study was developed in order to provide a method of estimating nutrient loads from east coast canals to the Bay and to provide an understanding of nutrient distribution and concentration in the east coast canal system. Models for estimation of nutrient loads were developed using the techniques of linear regression analysis. In order to understand current and historical water-quality in southern Florida, long-term trends from two surface water sites potentially affected by restoration efforts, Miami Canal at S-26 and Tamiami Canal - Forty Mile Bend to Monroe, were investigated. This task determined the water quality physical parameters for canals discharging into Biscayne Bay National Park

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: Unknown (process 1 of 1)
    Water-quality samples were collected upstream of discharge points of coastal canals in eastern Dade County during various seasons and flow conditions. Procedures were applied to determine if any statistical differences existed between depth-integrated and grab samples. Depth-integrated samples were collected by the equal-width-increment method. This method consists of raising and lowering a sampler through-out several verticals in the stream at a constant rate so that the bottle is not overfilled when returned to the surface and then compositing the water samples in a churn splitter. To establish the number of verticals that needed to be sampled and to determine horizontal and vertical variability within the water column, water-quality cross-sectional surveys were made of temperature, specific conductance, pH, and dissolved oxygen. Grab samples, obtained concurrently with the depth-integrated samples, were collected at 0.5 and 1.0 meter below the surface near the centroid of flow. Additionally, the upstream and downstream stages and gate openings were recorded during each sampling event in order to compute the instantaneous discharge from the appropriate rating. These ratings were developed using acoustic Doppler methodology as part of another South Florida Ecosystem Program project. Ordinary least squares regression techniques were employed to develop models for computing load based upon the relation between nitrogen and phosphorus concentrations or loads and instantaneous discharge.

    Person who carried out this activity:

    Michael Byrne
    U.S. Geologcial Survey
    1400 Colonial Blvd.

    Suite 70, Royal Palm Square
    Fort Myers, FL 33907

    239 275-8448 ext. 10 (voice)
    239 275-6820 (FAX)

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

    Lietz, A. C., 1999, Methodology for estimating nutrient loads discharged from the east coast Canals to Biscayne Bay, Miami-Dade County, Florida: Water Resources Investigations Report 99-4094, U.S. Geological Survey, Reston, VA.

    Online Links:

    Lietz, A. C., 2002, Feasibility of Estimating Constituent Concentrations and Loads Based on Data Recorded by Acoustic Instrumentation: USGS Open-File Report 02-285, U.S. Geological Survey, Tallahassee, FL.

    Online Links:

    Lietz, A. C., 2000, Analysis of Water-Quality Trends at Two Discharge Stations - One within Big Cypress National Preserve and One near Biscayne Bay - Southern Florida, 1966-94: Water Resources Investigations Report 00-4099, U.S. Geological Survey, Tallahassee, FL.

    Online Links:

    Lietz, A. C. Dixon, Joann; Byrne, Michae, 2002, Average altitude of the water table (1990-99) and frequency analysis of water levers (1974-99) in the Biscayne Aquifer, Miami-Dade County, Florida: USGS Open-File Report 02-91, 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?

    The positional accuracy of the sampling sites was determined using GPS techniques and published topographic maps.

  3. How accurate are the heights or depths?

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

    Data was collected at all the sites in 1996 and at the Snapper Creek Canal site in 1997 as well.

  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?

    lietz - water quality physical parameters data

  3. What legal disclaimers am I supposed to read?

    There are no explicit or implicit warrantees for the data.

  4. How can I download or order the data?

Who wrote the metadata?

Last modified: 28-Mar-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/waterqual_lietz.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 02 13:07:07 2007