SURFACE WATER NUTRIENT SAMPLING SITES

Metadata:


Identification_Information:
Citation:
Citation_Information:
Originator: U.S. Geological Survey
Publication_Date: 1999
Title:
SURFACE WATER NUTRIENT SAMPLING SITES
Geospatial_Data_Presentation_Form: vector digital data
Other_Citation_Details:
State of Florida
Online_Linkage: http://www.epa.gov/airmarkets/cmap/data/index.html
Description:
Abstract:
This dataset contains the sampling sites and data for the U.S. Geological Survey National Water-Quality Assessment (NAWQA) Program Study-Unit investigations of Surface Water Nutrients for the conterminous United States, excluding the High Plains Regional Ground-Water Study.
Purpose:
The National Water-Quality Assessment Program is designed to describe the status and trends in the quality of the Nation's ground- and surface-water resources and to provide a sound understanding of the natural and human factors that affect the quality of these resources (Leahy and others, 1990). A "Study Unit" is a major hydrologic system in which NAWQA studies are focused. Study Units are geographically defined by a combination of ground- and surface-water features (Gilliom and others, 1995). As part of the NAWQA program, Study-Unit investigations were planned for 60 areas throughout the Nation to provide a framework for national and regional water-quality assessments (Leahy and others, 1990). The 60 planned Study-Units were divided into three groups of 20. Each group would be intensively studied on a rotational basis with 20 studies beginning in fiscal year 1991 (FY 1991 runs from October 1990-September 1991), 20 more studies beginning in fiscal year 1994 (October 1993-September 1994), and the final 20 studies beginning in fiscal year 1997 (October 1996-September 1997). Each study cycle would span 10 years. In 1996, the number of Study-Units was scaled back to 59 when two of the original 60 Study Units combined. Also, because of budgetary restraints, some of the original planned Study Units have been scheduled to start later than originally planned and others have not even been scheduled to start yet. This coverage contains the boundaries for the 57 Study Units within the conterminous United States, excluding the High Plains Regional Ground Water-Study, which was conceived in late 1997. The coverage also includes the name, starting date, and NAWQA standard abbreviation of each Study Unit plus various codes to help display the data. This data set is used primarily to display the location of NAWQA Study Units and for analysis of data at the national scale. It is not recommended for either local or regional analysis due to the small scale of most of the features.
Supplemental_Information:
Point
Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: 1999
Currentness_Reference:
publication date
Status:
Progress: Complete
Maintenance_and_Update_Frequency: As needed
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -87.429040
East_Bounding_Coordinate: -79.872251
North_Bounding_Coordinate: 30.983191
South_Bounding_Coordinate: 24.492815
Keywords:
Theme:
Theme_Keyword_Thesaurus: NONE
Theme_Keyword: NAWQA
Theme_Keyword: National Water-Quality Assessment
Theme_Keyword: surface water nutrients
Theme_Keyword: USGS
Theme_Keyword: U.S. Geologic Survey
Access_Constraints: NONE
Use_Constraints:
NONE
Point_of_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: Florida Geographic Data Library (FGDL)
Contact_Address:
Address_Type: mailing and physical address
Address:
431 Architecture PO Box 115706
City: Gainesville
State_or_Province: FL
Postal_Code: 32611-5706
Contact_Electronic_Mail_Address: Web site: http://www.fgdl.org
Contact_Electronic_Mail_Address: Technical Support: http://www.fgdl.org/fgdlfeed.html
Contact_Electronic_Mail_Address: FGDL Frequently Asked Questions: http://www.fgdl.org/fgdlfaq.html
Contact_Electronic_Mail_Address: FGDL Mailing Lists: http://www.fgdl.org/fgdl-l.html
Contact_Electronic_Mail_Address: For FGDL Software: http://www.fgdl.org/software.html
Native_Data_Set_Environment:
Microsoft Windows 2000 Version 5.0 (Build 2195) Service Pack 2; ESRI ArcCatalog 8.2.0.700
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Data_Quality_Information:
Attribute_Accuracy:
Attribute_Accuracy_Report:
Relied on the integrity of the attribute information within the original data layer.
Quantitative_Attribute_Accuracy_Assessment:
Attribute_Accuracy_Explanation:
The National Water-Quality Assessment Program is designed to describe the status and trends in the quality of the Nation's ground- and surface-water resources and to provide a sound understanding of the natural and human factors that affect the quality of these resources (Leahy and others, 1990). A "Study Unit" is a major hydrologic system in which NAWQA studies are focused. Study Units are geographically defined by a combination of ground- and surface-water features (Gilliom and others, 1995).
Quantitative_Attribute_Accuracy_Assessment:
Attribute_Accuracy_Explanation:
As part of the NAWQA program, Study-Unit investigations were planned for 60 areas throughout the Nation to provide a framework for national and regional water-quality assessments (Leahy and others, 1990). The 60 planned Study-Units were divided into three groups of 20. Each group would be intensively studied on a rotational basis with 20 studies beginning in fiscal year 1991 (FY 1991 runs from October 1990-September 1991), 20 more studies beginning in fiscal year1994 (October 1993-September 1994), and the final 20 studies beginning in fiscal year 1997 (October 1996-September 1997). Each study cycle would span 10 years. In 1996, the number of Study-Units was scaled back to 59 when two of the original 60 Study Units combined. Also, because of budgetary restraints, some of the original planned Study Units have been scheduled to start later than originally planned and others have not even been scheduled to start yet.
Quantitative_Attribute_Accuracy_Assessment:
Attribute_Accuracy_Explanation:
This shapefile contains basic geographic information about the 213 surface water sites that were sampled for nutrients as part of NAWQA within the conterminous United States, excluding the High Plains Regional Ground Water-Study, which was conceived in late 1997. The shapefile also includes the NAWQA standard abbreviation of each Study Unit, the station identification code, sampling type, land-use type, percentages of specific land use types, and latitude and longitude coordinates .
Quantitative_Attribute_Accuracy_Assessment:
Attribute_Accuracy_Explanation:
The stream data are the results from 8459 water samples collected at 213 surface water sites across the conterminous United States. All of the sampling sites are located in the 20 major watersheds that comprise the first group of NAWQA study units. Samples were collected from October 1991 through December 1996. About 90 percent of the samples were collected during 1993, 1994, and 1995. All samples were flow-weighted and cross-sectionally integrated by standard USGS methods (Ward and Harr, 1990). Complete descriptions of sample collection and processing methods are provided by Shelton (1994).
Quantitative_Attribute_Accuracy_Assessment:
Attribute_Accuracy_Explanation:
Sampling at many sites was not spaced evenly throughout the year. Sampling at the intensive fixed sites was more frequent during periods when pesticide levels were expected to be elevated. At the basic fixed sites, extra samples were collected during extreme flow conditions. Thus, care must be used in the interpretation of these data. For example, summary statistics such as the mean or median concentration for a specific compound may be biased unless procedures are used to account for the uneven sampling frequency.
Quantitative_Attribute_Accuracy_Assessment:
Attribute_Accuracy_Explanation:
In addition, the number of samples collected varied considerably among the sites. Thus, the results shown in the surface water data file are influenced more by conditions at some sites than others. Data analysis procedures that account for this unequal distribution of samples among the sites must be used to avoid biased interpretations.
Quantitative_Attribute_Accuracy_Assessment:
Attribute_Accuracy_Explanation:
This data set is used primarily to display the location of NAWQA Surface Water Nutrient Study Sites and for use with the NAWQA Study Unit boundaries shapefile (NAWQA) for analysis of data at the national scale. It is not recommended for either local or regional analysis due to the small scale of most of the features. The dataset provides location and attribute information for use in national and regional cartographic and network analysis applications.
Quantitative_Attribute_Accuracy_Assessment:
Attribute_Accuracy_Explanation:
Scale is an important factor in data usage. Certain scale datasets are not suitable for some project, analysis, or modelling purposes. Please be sure you are using the best available data. 1:24000 scale datasets are recommended for projects that are at the county level. 1:24000 data should NOT be used for high accuracy base mapping such as property parcel boundaries. 1:100000 scale datasets are recommended for projects that are at the multi-county or regional level. 1:125000 scale datasets are recommended for projects that are at the regional or state level or larger. Vector datasets with no defined scale or accuracy should be considered suspect. Make sure you are familiar with your data before using it for projects or analysis. Every effort has been made to supply the user with data documentation. For additional information, see the References section and the Data Source Contact section of this documentation. For more information regarding scale and accuracy, see our webpage at: http://geoplan.ufl.edu/education.html. These data are based on interpretation of available information and should not be construed as legally binding.
Logical_Consistency_Report:
Relied on the integrity of the attribute information within the original data layer.
Completeness_Report:
Relied on the integrity of the attribute information within the original data layer.
Lineage:
Source_Information:
Source_Citation:
Citation_Information:
Originator: USGS
Publication_Date: 1999
Title:
SURFACE WATER NUTRIENT SAMPLING SITES
Source_Scale_Denominator: UNKNOWN
Type_of_Source_Media: mao
Source_Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: 1999
Source_Currentness_Reference:
publication date
Source_Citation_Abbreviation:
USGS
Source_Contribution:
Spatial and attribute information
Process_Step:
Process_Description:
Data originally released by USGS in 1999. Data was downloaded in shapefile format by the Center GeoPlan from the EPA website at: EPA Downloads site http://www.epa.gov/airmarkets/cmap/data/index.html in 2002. When received, data was in the following projection: Albers, Datum: NAD 83, Spheroid: GRS80, Units: Meters. The shapefile was then clipped to the State of Florida, projected to FGDL Albers HPGN, DESCRIPTitem was added based on NAME, core coverage items were dropped, upcased all character records, and fields with no values were removed.
Process_Date: 2002
Process_Step:
Process_Description:
GeoPlan, during the QA/QC process included the following aspects: 1.) Projected data to FGDL Albers HPGN (See "Map Projection Parameters" below). 2.) Clipped to the State of Florida 3.) DESCRIPT item added based on NAME 4.) Upcased all character records 5.) Linked with nutrient data file 6.) Dropped items AREA PERIMETER NUTRIENT_S NUTRIENT_1 In addition the following fields had no data so they were dropped: R00010 R00095 R00300 R00400 R00915 R00925 R00930 R00935 Ralk R00945 R00955 R01046 R01056 R70300 R00608 R00625 R00665
Process_Date: 2002
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Spatial_Data_Organization_Information:
Direct_Spatial_Reference_Method: Vector
Point_and_Vector_Object_Information:
SDTS_Terms_Description:
SDTS_Point_and_Vector_Object_Type: Entity point
Point_and_Vector_Object_Count: 5
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Spatial_Reference_Information:
Horizontal_Coordinate_System_Definition:
Planar:
Map_Projection:
Map_Projection_Name: Albers Conical Equal Area
Albers_Conical_Equal_Area:
Standard_Parallel: 24 0 0.000
Standard_Parallel: 31 30 0.000
Longitude_of_Central_Meridian: -84 0 0.000
Latitude_of_Projection_Origin: 24 0 0.000
False_Easting: 400000.00000
False_Northing: 0.000
Planar_Coordinate_Information:
Planar_Coordinate_Encoding_Method: coordinate pair
Coordinate_Representation:
Abscissa_Resolution: 0.002048
Ordinate_Resolution: 0.002048
Planar_Distance_Units: meters
Geodetic_Model:
Horizontal_Datum_Name: D_North_American_1983_HARN
Ellipsoid_Name: Geodetic Reference System 80
Semi-major_Axis: 6378137.000000
Denominator_of_Flattening_Ratio: 298.257222
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Entity_and_Attribute_Information:
Detailed_Description:
Entity_Type:
Entity_Type_Label: nawqan
Entity_Type_Definition:
.DBF file
Entity_Type_Definition_Source:
FGDL
Attribute:
Attribute_Label: FID
Attribute_Definition:
Internal feature number.
Attribute_Definition_Source:
ESRI
Attribute_Domain_Values:
Unrepresentable_Domain:
Sequential unique whole numbers that are automatically generated.
Attribute:
Attribute_Label: Shape
Attribute_Definition:
Data attribute inherent to the ESRI shapefile format, which defines the data as a point, polyline, or polygon.
Attribute_Definition_Source:
FGDL
Attribute_Domain_Values:
Unrepresentable_Domain:
Coordinates defining the features.
Attribute:
Attribute_Label: SU
Attribute_Definition:
USGS station identification number
Attribute_Definition_Source:
USGS
Attribute:
Attribute_Label: SITE
Attribute_Definition:
USGS station identification number
Attribute_Definition_Source:
USGS
Attribute:
Attribute_Label: NAME
Attribute_Definition:
Site Name
Attribute_Definition_Source:
USGS
Attribute:
Attribute_Label: SAMP_TYPE
Attribute_Definition:
Sampling Type; to identify the reason a particular sample was collected. Can be helpful in aggregating groups of samples for analysis and interpretation.
Attribute_Definition_Source:
USGS
Attribute:
Attribute_Label: LU_TYPE
Attribute_Definition:
Land Use Type 1. Urban 2. Agriculture 3. Rangeland 4. Forest 5. Water 6. Wetlands 7. Other
Attribute_Definition_Source:
USGS
Attribute:
Attribute_Label: URBAN
Attribute_Definition:
Percent Urban Land Use
Attribute_Definition_Source:
USGS
Attribute:
Attribute_Label: AGRICULTUR
Attribute_Definition:
Percent Agriculture Land Use
Attribute_Definition_Source:
USGS
Attribute:
Attribute_Label: RANGELAND
Attribute_Definition:
Percent Rangeland Land Use
Attribute_Definition_Source:
USGS
Attribute:
Attribute_Label: FOREST
Attribute_Definition:
Percent Forest Land Use
Attribute_Definition_Source:
USGS
Attribute:
Attribute_Label: WATER
Attribute_Definition:
Percent Water Land Use
Attribute_Definition_Source:
USGS
Attribute:
Attribute_Label: WETLANDS
Attribute_Definition:
Percent Wetlands Land Use
Attribute_Definition_Source:
USGS
Attribute:
Attribute_Label: OTHER
Attribute_Definition:
Percent Other Land Use
Attribute_Definition_Source:
USGS
Attribute:
Attribute_Label: LAT_DD
Attribute_Definition:
Latitude; in degrees, minutes, seconds
Attribute_Definition_Source:
USGS
Attribute:
Attribute_Label: LON_DD
Attribute_Definition:
Longitude; in degrees, minutes, seconds
Attribute_Definition_Source:
USGS
Attribute:
Attribute_Label: STATION
Attribute_Definition:
USGS station identifier
Attribute_Definition_Source:
USGS
Attribute:
Attribute_Label: DATEN
Attribute_Definition:
Date of sampling event or measurement
Attribute_Definition_Source:
USGS
Attribute:
Attribute_Label: TIMEN
Attribute_Definition:
Time of sampling event or measurement
Attribute_Definition_Source:
USGS
Attribute:
Attribute_Label: PURPOSE
Attribute_Definition:
Purpose code for sampling collection
Attribute_Definition_Source:
USGS
Attribute:
Attribute_Label: P00060
Attribute_Definition:
Mean daily streamflow, feet cubed per second
Attribute_Definition_Source:
USGS
Attribute:
Attribute_Label: P00061
Attribute_Definition:
Instantaneous daily streamflow, feet cubed per second
Attribute_Definition_Source:
USGS
Attribute:
Attribute_Label: P00010
Attribute_Definition:
Water temperature, degrees Celcius (C.)
Attribute_Definition_Source:
USGS
Attribute:
Attribute_Label: P00095
Attribute_Definition:
Specific conductance, microsiemens (us)/cm@25 degrees C.
Attribute_Definition_Source:
USGS
Attribute:
Attribute_Label: P00300
Attribute_Definition:
Specific conductance, microsiemens (us)/cm@25
Attribute_Definition_Source:
USGS
Attribute:
Attribute_Label: P00400
Attribute_Definition:
pH, whole water, field standard units
Attribute_Definition_Source:
USGS
Attribute:
Attribute_Label: P00915
Attribute_Definition:
Calcium, dissolved, mg/L as Ca
Attribute_Definition_Source:
USGS
Attribute:
Attribute_Label: P00925
Attribute_Definition:
Magnesium, dissolved, mg/L as Mg
Attribute_Definition_Source:
USGS
Attribute:
Attribute_Label: P00930
Attribute_Definition:
Sodium, dissolved, mg/L as Na
Attribute_Definition_Source:
USGS
Attribute:
Attribute_Label: P00935
Attribute_Definition:
Potassium, dissolved, mg/L as K
Attribute_Definition_Source:
USGS
Attribute:
Attribute_Label: PALK
Attribute_Definition:
Alkalinity, mg/L as CACO3 (mostly field titration of filtered water)
Attribute_Definition_Source:
USGS
Attribute:
Attribute_Label: P00940
Attribute_Definition:
Chloride, dissolved, mg/L as Cl
Attribute_Definition_Source:
USGS
Attribute:
Attribute_Label: P00945
Attribute_Definition:
Fluoride, dissolved, mg/L as F
Attribute_Definition_Source:
USGS
Attribute:
Attribute_Label: R00950
Attribute_Definition:
Silica, dissolved, mg/L as SiO2
Attribute_Definition_Source:
USGS
Attribute:
Attribute_Label: P00950
Attribute_Definition:
Fluoride, dissolved, mg/L as F
Attribute_Definition_Source:
USGS
Attribute:
Attribute_Label: P00955
Attribute_Definition:
Silica, dissolved, mg/L as SiO2
Attribute_Definition_Source:
USGS
Attribute:
Attribute_Label: P01046
Attribute_Definition:
Iron, dissolved, ug/L as Fe
Attribute_Definition_Source:
USGS
Attribute:
Attribute_Label: P01056
Attribute_Definition:
Manganese, dissolved, ug/L as Mn
Attribute_Definition_Source:
USGS
Attribute:
Attribute_Label: P70300
Attribute_Definition:
Residue, dissolved, at 180 degrees C., mg/L
Attribute_Definition_Source:
USGS
Attribute:
Attribute_Label: P00608
Attribute_Definition:
Ammonia, dissolved, mg/L as N
Attribute_Definition_Source:
USGS
Attribute:
Attribute_Label: R00613
Attribute:
Attribute_Label: P00613
Attribute_Definition:
Nitrite, dissolved, mg/L as N
Attribute_Definition_Source:
USGS
Attribute:
Attribute_Label: R00631
Attribute:
Attribute_Label: P00631
Attribute_Definition:
Nitrite and nitrate, dissolved, mg/L as N
Attribute_Definition_Source:
USGS
Attribute:
Attribute_Label: R00623
Attribute:
Attribute_Label: P00623
Attribute_Definition:
Ammonia and organic nitrogen dissolved, mg/L as N
Attribute_Definition_Source:
USGS
Attribute:
Attribute_Label: P00625
Attribute_Definition:
Ammonia and organic nitrogen, total, mg/L as N
Attribute_Definition_Source:
USGS
Attribute:
Attribute_Label: R00671
Attribute:
Attribute_Label: P00671
Attribute_Definition:
Orthophosphate, dissolved, mg/L as P
Attribute_Definition_Source:
USGS
Attribute:
Attribute_Label: R00666
Attribute:
Attribute_Label: P00666
Attribute:
Attribute_Label: P00665
Attribute_Definition:
Phosphorus, total, mg/L as P
Attribute_Definition_Source:
USGS
Attribute:
Attribute_Label: DESCRIPT
Attribute_Definition:
Calculated = Name
Attribute_Definition_Source:
FGDL
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Distribution_Information:
Distributor:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: Florida Geographic Data Library (FGDL)
Contact_Electronic_Mail_Address: Web site: http://www.fgdl.org
Contact_Electronic_Mail_Address: Technical Support: http://www.fgdl.org/fgdlfeed.html
Contact_Electronic_Mail_Address: FGDL Frequently Asked Questions: http://www.fgdl.org/fgdlfaq.html
Contact_Electronic_Mail_Address: FGDL Mailing Lists: http://www.fgdl.org/fgdl-l.html
Contact_Electronic_Mail_Address: For FGDL Software: http://www.fgdl.org/software.html
Resource_Description: Downloadable Data or CD
Distribution_Liability:
Florida Geographic Data Library is a product of the University of Florida GeoPlan Center with support from the Florida Department of Transportation and the Florida Department of Environmental Protection. THE FGDL DATA AS PROVIDED BY CONTRIBUTING ORGANIZATIONS AND ANY PROGRAMMING SOFTWARE CREATED BY THE UNIVERSITY OF FLORIDA GEOPLAN CENTER (COLLECTIVELY THE "MATERIALS") ARE COPYRIGHTED BY THE UNIVERSITY OF FLORIDA GEOPLAN CENTER FOR THE FGDL CONTRIBUTING AGENCIES AND ORGANIZATIONS (THE "DATA PROVIDERS"). DO NOT REPRODUCE, REDISTRIBUTE OR RESELL THE MATERIALS, OR PROVIDE THE MATERIALS FOR FREE TO CUSTOMERS OR CLIENTS, OR PLACE THE MATERIALS FOR DOWNLOAD ON A WEBSITE. ADDITIONALLY, WHEN USING FGDL DATA OR SOFTWARE IN PROJECTS, MAPS, ETC.; YOU AGREE TO ACKNOWLEDGE THE FGDL AS A DATA SOURCE. THE MATERIALS ARE PROVIDED "AS IS". THE UNIVERSITY OF FLORIDA GEOPLAN CENTER MAKES NO REPRESENTATIONS OR WARRANTIES ABOUT THE QUALITY OR SUITABILITY OF THE MATERIALS, EITHER EXPRESSLY OR IMPLIED, INCLUDING BUT NOT LIMITED TO ANY IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT. THE UNIVERSITY OF FLORIDA GEOPLAN CENTER MAKES NO WARRANTIES, GUARANTIES OR REPRESENTATIONS AS TO THE TRUTH, ACCURACY OR COMPLETENESS OF THE DATA PROVIDED BY THE FGDL CONTRIBUTING ORGANIZATIONS. THE UNIVERSITY OF FLORIDA GEOPLAN CENTER SHALL NOT BE LIABLE FOR ANY DAMAGES SUFFERED AS A RESULT OF USING, MODIFYING, CONTRIBUTING OR DISTRIBUTING THE MATERIALS.
Standard_Order_Process:
Digital_Form:
Digital_Transfer_Information:
Transfer_Size: 0.026
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Metadata_Reference_Information:
Metadata_Date: 20020828
Metadata_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: U.S. Geological Survey
Contact_Person: Kerie J. Hitt
Contact_Address:
Address_Type: mailing and physical address
Address:
12201 Sunrise Valley Drive, MS-413
City: Reston
State_or_Province: VA
Postal_Code: 20192
Contact_Voice_Telephone: 703-648-6854
Contact_Electronic_Mail_Address: kjhitt@usgs.gov
Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata
Metadata_Standard_Version: FGDC-STD-001-1998
Metadata_Time_Convention: local time
Metadata_Extensions:
Online_Linkage: http://www.esri.com/metadata/esriprof80.html
Profile_Name: ESRI Metadata Profile
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