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Loxahatchee National Wildlife Refuge Data

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Frequently-anticipated questions:


What does this data set describe?

Title: Loxahatchee National Wildlife Refuge Data
Abstract:
The Loxahatchee National Wildlife Refuge (LOX) is a water-dominated ecosystem that is susceptible to water-quality impacts. A comprehensive analysis of historical water-quality and ancillary data is needed to direct the restoration of the Everglades and the adoption of water-quality standards in LOX because of its designation as Outstanding Florida Waters.
  1. How should this data set be cited?

    Benjamin McPherson (retired) Ronald L. Miller (retired); Arturo Torres, 2005, Loxahatchee National Wildlife Refuge Data.

    Online Links:

  2. What geographic area does the data set cover?

    West_Bounding_Coordinate: -81.55
    East_Bounding_Coordinate: -80.125
    North_Bounding_Coordinate: 26.75
    South_Bounding_Coordinate: 25.11

  3. What does it look like?

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

    Beginning_Date: 21-Sep-1993
    Ending_Date: 06-Nov-2002
    Currentness_Reference: ground condition

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

    Geospatial_Data_Presentation_Form: spreadsheet

  6. How does the data set represent geographic features?

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

      Indirect_Spatial_Reference: Loxahatchee NWR
      This is a Point data set. It contains the following vector data types (SDTS terminology):
      • Point (19)

    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 0.01. Longitudes are given to the nearest 0.01. 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.

      Vertical_Coordinate_System_Definition:
      Altitude_System_Definition:
      Altitude_Datum_Name: National Geodetic Vertical Datum of 1929
      Altitude_Resolution: 1.0
      Altitude_Distance_Units: meters
      Altitude_Encoding_Method: Implicit coordinate

  7. How does the data set describe geographic features?

    Entity_and_Attribute_Overview:
    Data collected for each LOX site include: site (name), date and time collected, station ID, and record#+DB#.

    There are five spreadsheets for the data: Site and Parameter Information, Field Parameters and Nutrients, Major Ions and Trace Metals, Pesticides in Sediment, and Pesticides in Water. The Site and Parameter Information defines the parameters and lists the reporting units.

    The parameters for Field parameters and Nutrients include: Water temp Celsius; Fld spec cond, uS/cm; Diss oxygen, mg/L; Field pH; Turbidity, NTU; Color, Pt-Co units; NH4, mg/L; NO2, mg/L; Nitrogen Nitrate Dissolved (mg/L as N); NH4+orgN diss., mg/L; NH4+orgN total, mg/L; NO2+NO3,mg/L; total nitrogen, mg/L; Total phosphorus, mg/L; Diss. Phosphorus, mg/L; dissolved PO4, mg/L; Diss Org C, mg/L; and Suspended solids, mg/L.

    The parameters for Major Ions and Trace Metals include; Magnesium, mg/L; Sodium, mg/L; Potassium, mg/L; Chloride, mg/L; Sulfate, mg/L; Silica, mg/L as SiO2; Arsenic Total, ug/L as AS; Cadmium total, ug/L as CD, Copper total, ug/L as CU; Iron total, ug/L as FE; Lead total, ug/L as PB; Zinc total, ug/L as ZN; and Mercury, total recov., ug/L.

    The parameters for Pesticides in Sediment include: Metribuzin, sediment, bottom material, recoverable, ug/L; Metolachlor, sediment, bottom material, recoverable, ug/kg; Endosulfan Sulfate bottom material, ug/kg; Endosulfan Beta bottom material, ug/kg; Endosulfan Alpha bottom material, ug/kg; Endrin Aldehyde bottom material, ug/kg; Simazine in bottom material, ug/kg dry solids, P,P' DDD in bottom material, ug/kg dry solids; Aldrin in bottom material, ug/kg dry solids; Chlordane, technical, in bottom material, ug/kg dry solid; P,P'-DDE, sediment, bed material, dry weight, recoverable, ug/kg; P,P'-DDT, sediment, bed material, dry weight, recoverable, ug/kg; Dieldrin in bottom material, ug/kg dry solids; Endrin in bottom material, ug/kg dry solids; Ethion in bottom material, ug/kg dry solids; Toxaphene in bottom material, ug/kg dry solids; Heptachlor in bottom material, ug/kg dry solids; Heptachlor Epoxide in bottom material, ug/kg dry solids; Methoxychlor in bottom material, ug/kg dry solids; Diazinon in bottom material, ug/kg dry solids; Methyl Parathion in bottom material, ug/kg dry solids; Atrazine in bottom material, ug/kg dry solids; 2,4-D in bottom material, ug/kg dry solids; 2,4,5-T in bottom material, ug/kg dry solids; Chlorothalonil, sed, bmws,<2mmdw, rec, ug/kg; Ethoprop, bed material, rec, ug/kg; Disulfoton sulfone, bed material, rec, ug/kg; btm sed ametryn, ug/kg; Prometryn, sediment, bottom material, dry wht, recoverable, ug/kg; Phorate, bed material, rec, ug/kg; and Fonofos, bed material, rec, ug/kg.

    The parameters for Pesticides in Water include: Bromacil, water, whole, recoverable, ug/L; Butylate, water, whole, recoverable, ug/L; Methiocarb, water whole, ug/L; Propoxur, whole water, ug/L; Endosulfan Sulfate total, ug/L; Endrin Aldehyde total, ug/L; Linuron, water, whole, recoverable, ug/L; Naled, water, whole, total, ug/L; Oxamyl, water, whole, recoverable, ug/L; Fenamiphos, water, whole, recoverable, ug/L; chlorpyrifos, ug/L; Dimethoate, water, whole, total, ug/L; Trifluralin, total recoverable, ug/L; perthane, ug/L; Methomyl, total, ug/L; Simazine, total, ug/L; Prometryn, total, ug/L; aldrin, ug/L; Alpha BHC total, ug/L; chlordane, ug/L; Metolachlor, water, unfiltered, recoverable, ug/L; p,p'-DDE, ug/l; dieldrin, ug/L; endrin, ug/L; ethion, ug/L; toxaphene, ug/L; heptachlor, ug/L; methoxychlor, ug/L; malathion, ug/L; parathion, ug/L; Demetron, water, whole, recoverable, ug/L; methylparathion, ug/L; diazinon, ug/L; atrazine unfiltered, ug/L; Diuron, water, whole, recoverable, ug/L; 2,4-D, total, ug/L; 2.4.5-T total, ug/L; Carbaryl, unfiltered recoverable, ug/L; Silvex, total, ug/L; Dicofol, total, ug/L; trithion, ug/L; Glyphosate, water, unfiltered, recoverable, ug/L; Chlorothalonil, water, whole, recoverable, ug/L; Norflurazon, water, whole, recoverable, ug/L; Metribuzin, whole water, ug/L; Ethoprop, water, whole, recoverable, ug/L; Acephate, water, whole, recoverable, ug/L; 2,4-DP total, ug/L; Aldicard Sulfoxide, whole water, ug/L; Aldicarb Sulfone, whole water, ug/L; fonofos dyfonate, ug/L; Carbofuran, whole water, ug/L; Disulfoton, water, whole, total recoverable, ug/L; and Aldicarb , whole water, ug/L.

    ug/L = microgram per liter

    Entity_and_Attribute_Detail_Citation: USGS and SFWMD personnel


Who produced the data set?

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

    • Benjamin McPherson (retired)

  2. Who also contributed to the data set?

    The National Park Service collected the samples in the field and the SFWMD provided sampling equipment and laboratory analyses.

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

    Arturo Torres
    U. S. Geological Survey
    USGS Florida Integrated Science Center; FISC-Tampa

    10500 University Center Drive, Suite 215
    Tampa, FL 33612
    USA

    813 975-8620 ext 128 office (voice)
    aetorres@usgs.gov


Why was the data set created?

Loxahatchee National Wildlife Refuge (LOX) maintains a separate networks of hydrologic monitoring stations (hydrostations) for measuring the stage and quality of surface water throughout the units. The data collected at these sites provides a historical baseline for assessing hydrologic conditions and making a wide range of management decisions (both internally and externally). Surface-water stage data is relatively straight-forward to analyze, both in real time and relative to historic conditions, and has typically been conducted by in-house hydrology staff at both units. Analysis of surface water-quality data is generally regarded as being more complex because of the subtleness of trends, absence of continuous data, and dependence on surface water depth and season.

Collection and analysis of water-quality samples at LOX was done under cooperative agreements with the South Florida Water Management District (SFWMD). Under these agreements, the Park Service collects the samples in the field and the SFWMD provides sampling equipment and laboratory analyses. Water-quality data have been collected at 10 internal marsh sites in LOX by the U.S. Fish and Wildlife Service for over 10 years. These samples have been analyzed by SFWMD laboratory.

In 2000, a study was begun by the U.S. Geological Survey to gather, edit, and interpret selected water-quality data from a variety of sources to improve the understanding of changes in water-quality in areas impacted by human activities or in more remote and relatively unimpacted areas of the Everglades and Big Cypress Swamp. The study area was extended into LOX in 2003.


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: 2005 (process 1 of 1)
    The objective of this project was to analyze, summarize, and report on water-quality data (field parameters and nutrients, major ions and trace metals, pesticides in sediment, and pesticides in water) collected in freshwaters in or near LOX over the period of record. The analysis included an evaluation of seasonal and long-term trends, spatial patterns, and possible effects of hydrologic, climatic, and human-induced perturbations. Specific objectives included: (1) determination of baseline water-quality conditions relative to the designations as Outstanding Florida Waters (OFW) and Outstanding National Resource Water (ONRW); (2) an analysis of water-quality conditions across the landscape, and at internal marsh sites relative to conditions in upstream canals; and (3) an analysis of long-term trends for selected parameters: chloride, sulfate, total phosphorus, total nitrogen, and specific conductance.

    Water-quality and ancillary data were collected from the files of the U.S. Geological Survey, South Florida Water Management District, Everglades National Park, Big Cypress National Preserve, the U.S. Fish and Wildlife Service, some southern Florida County agencies, State of Florida agencies, and other sources of long-term water-quality and ancillary data. Available data was collected in electronic files from the original source. The intention was not to collect every available piece of data, but to collect data with the potential to detect long-term trends or lack thereof in chemical concentrations. Focus was on chemicals of environmental importance.

    Station location and description, and period of record data are stored for each sampling location in the USGS NWIS database and in the South Florida Water Management District DBHYDRO database.

    Data were reformatted, if necessary, for storage in a database at the U.S. Geological Survey Subdistrict Office in Tampa, Florida. When feasible, data was screened using chemical logic checks developed by Ronald Miller of the USGS in St. Petersburg, Florida.

    Various graphs and statistical evaluations were used to detect correlations between variables and trends in concentration. Selected graphs and statistical results will be incorporated into a written report of the interpretations.

    Person who carried out this activity:

    Arturo Torres
    U. S. Geological Survey
    USGS Florida Integrated Science Center; FISC-Tampa

    10500 University Center Drive, Suite 215
    Tampa, FL 33612
    USA

    813 975-8620 ext 128 office (voice)
    aetorres@usgs.gov

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

    McPherson, Benjamin F. Halley, Robert, 1996, The South Florida Environment: a region under stress: USGS Circular 1134, U.S. Geological Survey, Reston, VA.

    Online Links:

    Other_Citation_Details:
    accessed as of 6/27/2011

    Southern Florida NAWQA Program publication

    McPherson, Benjamin F. Miller, Ronald L.; Haag, Ki, 2000, Water Quality in Southern Florida, 1996 - 98: USGS Circular 1207, U.S. Geological Survey, Reston, VA.

    Online Links:

    Other_Citation_Details: accessed as 6/27/2011
    Miller, Ronald L. McPherson, Benjamin F., 2001, Occurrence And Distribution Of Contaminants In Bottom Sediment and Water Of The Barron River Canal, Big Cypress National Preserve, Florida, October 1998: Florida Scientist v. 64, n. 1, Florida Academy of Sciences, Orlando, FL.

    Online Links:

    Other_Citation_Details:
    accessed as of 6/27/2011

    originally published in Florida Scientist, vol. 64, Winter, 2001, Number 1

    Miller, R. L. McPherson, B. F., 2008, Water Quality in the Arthur R. Marshall Loxahatchee National Wildlife Refuge - Trends and Spatial Characteristics of Selected Constituents, 1974-2004: USGS Scientific Investigations Report 2007-5277, U.S. Geological Survey, Reston, VA.

    Online Links:

    Other_Citation_Details: accessed as of 6/27/2011


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?

    Records for stations in Loxahatchee National Wildlife Refuge (LOX) vary for the data depending on what data were collected.

    Field Parameters and Nutrients are available for stations LOX3, LOX4, LOX5, LOX6, LOX7, LOX 8, LOX9, LOX10, LOX11, LOX12, LOX13, LOX14, LOX16, LOX16 from September 1993 to September 2002 and for stations S-10A, S-10C, S-10D, S-5A, and S6 from June, 1974 to November 2002.

    Major Ions and Trace Minerals are available for stations LOX3, LOX4, LOX5, LOX6, LOX7, LOX 8, LOX9, LOX10, LOX11, LOX12, LOX13, LOX14, LOX16, LOX16 from June 1994 to September 2002 and for stations S-10A, S-10C, S-10D, S-5A, and S6 from June 1974 to October 2002.

    Pesticides in Sediments are available only for stations LOX8, LOX10, S-5A and S6 from August 1984 to June 2001.

    Pesticides in Water are available only for stations S-5A and S6 from August 1984 to April 2002.

    Not all stations have data for each set of parameters from the same starting date to the same ending date .

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

    All stations are surface water sites. Missing or unavailable data are indicated by --


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:
This data is presented as a service to scientists, managers, educators, and the general public by the South Florida Information Access (SOFIA) Data Exchange site (<https://sofia.usgs.gov>). Please be advised that this data is presented to you exactly as it was provided to SOFIA by the Principal Investigator of the project generating the data. It is not intended to represent final and approved data. It may contain errors and may not yet be complete. The source for final and approved data will be the SOFIA Database. For any questions, please contact SOFIA Project Coordinator Heather Henkel at hhenkel@usgs.gov.

  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?

    Loxahatchee NWR data

  3. What legal disclaimers am I supposed to read?

    Not intended to represent final and approved data. It may contain errors and may not yet be complete.

  4. How can I download or order the data?


Who wrote the metadata?

Dates:
Last modified: 27-Jun-2011
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)


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

U.S. Department of the Interior, U.S. Geological Survey
Comments and suggestions? Contact: Heather Henkel - Webmaster
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