NAWQA GIS ancillary data: Overland flow, mean annual recharge, mean annual runoff, slope, topographic wetness index, and subsurface flow contact time for sampling points

Metadata:

• Identification_Information
• Data_Quality_Information
• Spatial_Data_Organization_Information
• Entity_and_Attribute_Information
• Distribution_Information
• Metadata_Reference_Information

Identification_Information:

Citation:

Citation_Information:

Originator: Hitt, Kerie J.

Publication_Date: 20040816

Title:

NAWQA GIS ancillary data: Overland flow, mean annual recharge, mean annual runoff, slope, topographic wetness index, and subsurface flow contact time for sampling points

Online_Linkage: <URL:http://water.usgs.gov/nawqa-only/gw.html>

Description:

Abstract:

This data set consists of percent Dunne overland flow from TOPMODEL, percent Horton overland flow from TOPMODEL, mean annual recharge, mean annual runoff (1951-80), slope from 1-km resolution DEMs, topographic wetness index, and subsurface flow contact time for NAWQA sampling sites. The input grids were prepared by David Wolock. The sampling sites are from the NAWQA data warehouse.

Purpose:

This is one of the ancillary GIS data layers developed to characterize NAWQA sampling sites for national synthesis of water-quality data.

Supplemental_Information:

The input data set did not include Alaska and Hawaii.

Time_Period_of_Content:

Time_Period_Information:

Multiple_Dates/Times:

Single_Date/Time:

Calendar_Date: 1991

Single_Date/Time:

Calendar_Date: 2001

Currentness_Reference:

The data set is intended to represent conditions for the early 1990's to late 1990's.

Status:

Progress: Complete

Maintenance_and_Update_Frequency:

NAWQA sampling sites are added as their locations become available.

Spatial_Domain:

Bounding_Coordinates:

West_Bounding_Coordinate: -125

East_Bounding_Coordinate: -66

North_Bounding_Coordinate: 50

South_Bounding_Coordinate: 24

Keywords:

Theme:

Theme_Keyword_Thesaurus: None

Theme_Keyword: Ground water

Theme_Keyword: Surface water

Theme_Keyword: Water quality

Theme_Keyword: Overland flow

Theme_Keyword: Dunne overland flow

Theme_Keyword: Horton overland flow

Theme_Keyword: Mean annual recharge

Theme_Keyword: Slope

Theme_Keyword: Topographic wetness index

Theme_Keyword: Subsurface flow contact time

Access_Constraints: The data set is for internal USGS access only.

Use_Constraints: The data set is for internal USGS use only.

Data_Quality_Information:

Logical_Consistency_Report: none

Completeness_Report: none

Lineage:

Source_Information:

Source_Citation:

Citation_Information:

Originator: Wolock, D.M.

Publication_Date: 2002

Title:

Overland flow, runoff, slope, topographic wetness index, and subsurface flow contact time grids

Type_of_Source_Media: On line

Source_Time_Period_of_Content:

Time_Period_Information:

Multiple_Dates/Times:

Single_Date/Time:

Calendar_Date: 1951

Single_Date/Time:

Calendar_Date: 1990

Source_Currentness_Reference: Ground condition

Source_Citation_Abbreviation: None

Source_Contribution:

5K grids of percent Dunne overland flow from TOPMODEL and percent Horton overland flow from TOPMODEL. 1K grids of mean annual runoff (1951-80), slope from 1-km resolution DEMs, topographic wetness index, and subsurface flow contact time.

Source_Information:

Source_Citation:

Citation_Information:

Originator: Wolock, D.M.

Publication_Date: 2003

Title:

Estimated mean annual natural ground-water recharge in the conterminous United States

Series_Information:

Series_Name: U.S. Geological Survey Open-File Report

Issue_Identification: 03-311

Publication_Information:

Publication_Place: Reston, VA

Publisher: U.S. Geological Survey

Geospatial_Data_Presentation_Form: raster digital data

Online_Linkage: <URL:http://water.usgs.gov/lookup/getspatial?rech48grd>

Type_of_Source_Media: On line

Source_Time_Period_of_Content:

Time_Period_Information:

Multiple_Dates/Times:

Single_Date/Time:

Calendar_Date: 1951

Single_Date/Time:

Calendar_Date: 1980

Source_Currentness_Reference: Ground condition

Source_Citation_Abbreviation: None

Source_Contribution:

1K grid of mean annual recharge created by multiplying BFI by mean annual runoff.

Source_Information:

Source_Citation:

Citation_Information:

Originator: Price, C.

Publication_Date: 20040528

Title: NAWQA sampling points (NAWQAPT)

Edition: May 2004

Geospatial_Data_Presentation_Form: vector digital data

Publication_Information:

Publication_Place: Rapid City, SD

Publisher: U.S. Geological Survey

Type_of_Source_Media: digital files

Source_Time_Period_of_Content:

Time_Period_Information:

Single_Date/Time:

Calendar_Date: 20040528

Source_Currentness_Reference: current

Source_Citation_Abbreviation: NAWQAPT

Source_Contribution: The location of all of the NAWQA sampling sites.

Process_Step:

Process_Date: 20020613

Process_Description:

Intersected sampling points with each attribute using GRIDSPOT with Nearest option. The station is assigned the value of the grid cell that the point falls in. (March 2002 version of NAWQAPT.)

Process_Step:

Process_Date: 20020802

Process_Description:

Intersected sampling points with each attribute using GRIDSPOT with Nearest option. The station is assigned the value of the grid cell that the point falls in. (July 2002 version of NAWQAPT.)

Process_Step:

Process_Date: 20030926

Process_Description:

Intersected sampling points with each attribute using GRIDSPOT with Nearest option. The station is assigned the value of the grid cell that the point falls in. (July 2003 version of NAWQAPT.)

Process_Step:

Process_Date: 20040315

Process_Description:

Intersected sampling points with each attribute using GRIDSPOT with Nearest option. The station is assigned the value of the grid cell that the point falls in. (March 2004 version of NAWQAPT.)

Process_Step:

Process_Date: 20040816

Process_Description:

Intersected sampling points with each attribute using GRIDSPOT with Nearest option. The station is assigned the value of the grid cell that the point falls in. (May 2004 version of NAWQAPT.)

Spatial_Data_Organization_Information:

Indirect_Spatial_Reference:

The data set is referenced by STAID, the station id of the NAWQA sampling site.

Entity_and_Attribute_Information:

Overview_Description:

Entity_and_Attribute_Overview:

The data set is organized by STAID (station id). Missing data is indicated by -9999.

The fields are:

STAID        Station id
PERDUN       Percent Dunne overland flow from TOPMODEL (%)
PERHOR       Percent Horton overland flow from TOPMODEL (%)
RECHARGEBFI  Mean annual recharge (1961-80) from base-flow analysis
             and Gebert runoff (inches)
RUNOFF       Mean annual runoff (1951-80) from Gebert (inches)
SLOPE        Slope from 1-km resolution DEMs (%)
TWI          Topographic wetness index from 1-km resolution DEM (ln(m))
CONTACT      Subsurface flow contact time (days)

Entity_and_Attribute_Detail_Citation: None

Distribution_Information:

Distributor:

Contact_Information:

Contact_Person_Primary:

Contact_Person: Kerie Hitt

Contact_Organization: USGS NAWQA Nutrients National Synthesis

Contact_Address:

Address_Type: Mailing address

Address: 413 National Center

City: Reston

State_or_Province: VA

Postal_Code: 20192

Country: USA

Contact_Electronic_Mail_Address: kjhitt@usgs.gov

Contact_Voice_Telephone: 703 648-6854

Contact_Instructions: Contact via email

Distribution_Liability:

USGS assumes no liability for the use of this data set.

Metadata_Reference_Information:

Metadata_Date: 20040816

Metadata_Contact:

Contact_Information:

Contact_Person_Primary:

Contact_Person: Kerie Hitt

Contact_Organization: USGS NAWQA Nutrients National Synthesis

Contact_Address:

Address_Type: Mailing address

Address: 413 National Center

City: Reston

State_or_Province: VA

Postal_Code: 20192

Country: USA

Contact_Electronic_Mail_Address: kjhitt@usgs.gov

Contact_Voice_Telephone: 703 648-6854

Contact_Instructions: Contact via email

Metadata_Standard_Name: Content standards for digital geospatial metadata

Metadata_Standard_Version: FGDC-STD-001-1998