Wyoming Aquifer Recharge Sensitivity Rating

Metadata:

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

Identification_Information:

Citation:

Citation_Information:

Originator: Larry C. Munn and Christopher S. Arneson

Publication_Date: 1998

Title: Wyoming Aquifer Recharge Sensitivity Rating

Publication_Information:

Publication_Place: Laramie, Wyoming

Publisher: University of Wyoming Spatial Data and Visualization Center

Online_Linkage: <URL:http://www.sdvc.uwyo.edu/clearinghouse/water.html>

Description:

Abstract:

This dataset represents an aquifer sensitivity rating for naturally occurring recharge in the State of Wyoming. This dataset is specifically to be used within a DRASTIC-type aquifer sensitivity/vulnerability analysis. The dataset is in raster format with 500 meter cell size.

For more details about this dataset, please refer to this report:

Hamerlinck, J.D. and Arneson, C.S., editors, 1998, Wyoming Ground-Water Vulnerability Assessment Handbook: Volume 1. Background, Model Development, and Aquifer Sensitivity Analysis: Spatial Data and Visualization Center Publication SDVC 98-01-1, University of Wyoming, Laramie, WY.

Purpose:

This layer was developed specifically to serve as a parameter in a ground-water vulnerability to surface contamination study conducted at the Wyoming Water Resources Center. The DRASTIC-based model requires surficial aquifer recharge as one of its parameters. No other suitable uses for this data are known.

Time_Period_of_Content:

Time_Period_Information:

Single_Date/Time:

Calendar_Date: 1998

Currentness_Reference: publication date

Status:

Progress: complete

Maintenance_and_Update_Frequency:

none planned

Spatial_Domain:

Bounding_Coordinates:

West_Bounding_Coordinate: -111.26477012

East_Bounding_Coordinate: -103.83670034

North_Bounding_Coordinate: 44.99903411

South_Bounding_Coordinate: 40.94837176

Keywords:

Theme:

Theme_Keyword: recharge

Theme_Keyword: aquifer

Theme_Keyword: annual

Theme_Keyword: groundwater vulnerability

Theme_Keyword: rating

Theme_Keyword: aquifer sensitivity

Theme:

Theme_Keyword_Thesaurus: None

Place:

Place_Keyword: Wyoming

Place:

Place_Keyword_Thesaurus: none

Access_Constraints: none

Use_Constraints:

This data should not be used for analysis at a scale larger than 1:500,000. Because updates to this dataset or the attached metadata will occur without notice, this dataset may not be redistributed or repackaged in any form without the express written consent of the University of Wyoming Spatial Data and Visualization Center. Instead it is recommended that additional users download the most current version of the data from <http://www.sdvc.uwyo.edu/clearinghouse>.

Point_of_Contact:

Contact_Information:

Contact_Person_Primary:

Contact_Person: Chris Arneson

Contact_Organization: Spatial Data and Visualization Center

Contact_Address:

Address_Type: mailing address

Address: Box 4008 University Station

City: Laramie

State_or_Province: Wyoming

Postal_Code: 82071

Country: USA

Contact_Voice_Telephone: 307-766-2735

Contact_Electronic_Mail_Address: arneson@uwyo.edu

Hours_of_Service: 8:00 - 5:00 MST

Native_Data_Set_Environment:

This dataset is a raster layer created using ARC/INFO GRID version 7.1.2 on a SUN Microsystems UNIX computer.

Data_Quality_Information:

Attribute_Accuracy:

Attribute_Accuracy_Report: see Process Steps

Completeness_Report: All cells within the State of Wyoming are attributed.

Logical_Consistency_Report: does not apply to raster data

Positional_Accuracy:

Horizontal_Positional_Accuracy:

Horizontal_Positional_Accuracy_Report: see Process Steps

Lineage:

Source_Information:

Source_Citation:

Citation_Information:

Title:

Wyoming Estimated Net Annual Aquifer Recharge <URL:http://www.sdvc.uwyo.edu/clearinghouse/metadata/rech500k.html>

Originator: L.C. Munn and C.S. Arneson

Publication_Date: 1998

Source_Scale_Denominator: 500000

Type_of_Source_Media: digital map

Source_Time_Period_of_Content:

Time_Period_Information:

Single_Date/Time:

Calendar_Date: 1998

Source_Currentness_Reference: Current

Source_Citation_Abbreviation: recharge dataset

Source_Contribution: ratings are derived directly from recharge amounts

Process_Step:

Process_Description:

Using the Wyoming Estimated Net Annual Aquifer Recharge dataset (Munn and Arneson, 1998; see link in Source Title above for related metadata) a series of rating equations were applied to make the dataset suitable for use in an additive-overlay type aquifer sensitivity model. The equations applied within ARC/INFO's GRID module were:

Rating = SQRT(Recharge x 6.749) + 1

This rating equation defined by the Wyoming Water Resources Center produces a continuous curve similar to that outlined in EPA's DRASTIC manual (Aller et al. 1987). The curve begins at 1 and has a maximum value of 10. Calculations were done in ARC/INFO's GRID module at a 500 meter cell resolution.

Citation

Aller, L., Bennett, T., Lehr, J.J., Petty, R., and G. Hackett. 1987. DRASTC: A Standardized sytem for evaluating ground water pollution using hydrogeologic settings. U.S. Environmental Protection Agency. EPA/600/S2-87/035. Cincinati, OH.

Process_Date: 1997

Spatial_Data_Organization_Information:

Direct_Spatial_Reference_Method: Raster

Raster_Object_Information:

Raster_Object_Type: Grid Cell

Row_Count: 898

Column_Count: 1172

Spatial_Reference_Information:

Horizontal_Coordinate_System_Definition:

Planar:

Map_Projection:

Map_Projection_Name: Lambert Conformal Conic

Lambert_Conformal_Conic:

Standard_Parallel: 33

Standard_Parallel: 45

Longitude_of_Central_Meridian: -107.5

Latitude_of_Projection_Origin: 41

False_Easting: 0.00000

False_Northing: 0.00000

Planar_Coordinate_Information:

Planar_Coordinate_Encoding_Method: coordinate pair

Coordinate_Representation:

Abscissa_Resolution: 1.0

Ordinate_Resolution: 1.0

Planar_Distance_Units: METERS

Geodetic_Model:

Horizontal_Datum_Name: North American Datum of 1983

Ellipsoid_Name: GRS1980

Semi-major_Axis: 6378137

Denominator_of_Flattening_Ratio:

298.257

Entity_and_Attribute_Information:

Overview_Description:

Entity_and_Attribute_Overview:

This raster dataset is in floating point format, so it is not currently Associated with an attribute table. The values of the cells range from 1 to 10.

Entity_and_Attribute_Detail_Citation: n/a

Distribution_Information:

Distributor:

Contact_Information:

Contact_Person_Primary:

Contact_Person: SDVC Technical Coordinator

Contact_Organization: Spatial Data and Visualization Center

Contact_Address:

Address_Type: mailing address

Address: Box 4008 University Station

City: Laramie

State_or_Province: Wyoming

Country: USA

Postal_Code: 82071

Contact_Voice_Telephone: 307-766-2532

Contact_Electronic_Mail_Address: n/a

Distribution_Liability:

The distributor shall not be held liable for improper or incorrect use of this data, based on the description of appropriate/inappropriate used described in this metadata document. The distributor makes no claims for the data's suitability for other purposes. It is strongly recommended that this data is directly acquired from the distributor described above and not indirectly through other sources which may have changed the data in some way.

Standard_Order_Process:

Digital_Form:

Digital_Transfer_Information:

Format_Name: ARCE (Arc/Info export)

Format_Version_Number: 7.0.4

Format_Version_Date: 1995

File_Decompression_Technique: Export file was created using defaults, no compression

Digital_Transfer_Option:

Online_Option:

Computer_Contact_Information:

Network_Address:

Network_Resource_Name: ftp.sdvc.uwyo.edu or <http://www.sdvc.uwyo.edu/clearinghouse>

Access_Instructions:

The data can be accessed online two different way: by anonymous ftp or by the world wide web. The anonymous ftp server is ftp.sdvc.uwyo.edu, and the data is stored in the /pub/gis directory. The WWW page is <http://www.sdvc.uwyo.edu/clearinghouse>. Instructions are provided on-line for downloading and importing the data.

Online_Computer_and_Operating_System:

Both the ftp and WWW server which this data is available from is a Silicon Graphics Challenge server, running the IRIX 6.2 UNIX operating system.

Fees: No fees are required for downloading the data that is on-line.

Metadata_Reference_Information:

Metadata_Date: 199808

Metadata_Contact:

Contact_Information:

Contact_Person_Primary:

Contact_Person: Margo Berendsen

Contact_Address:

Address_Type: mailing address

Address: Box 4008 University Station

City: Laramie

State_or_Province: Wyoming

Postal_Code: 82071

Country: USA

Contact_Voice_Telephone: 307-766-2751

Contact_Electronic_Mail_Address: meh@uwyo.edu

Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata

Metadata_Standard_Version: FGDC-STD-001-1998