Identification_Information:
  Citation:
    Citation_Information:
      Originator: John Mullaney
      Publication_Date: not published
      Title: cl_ro_clip: Estimated chloride concentration in runoff based on wet deposition of chloride 1994-2002, in mg/sq km per 1 year
      Geospatial_Data_Presentation_Form: raster digital data
      Online_Linkage: none
  Description:
    Abstract:  This data set was used to get some estimation of the background
               average chloride concentrations in streams in the U.S. based on
               regional runoff data and chloride wet deposition data. The data 
               is clipped to the galcial aquifer system boundary in the US.
    Purpose: 	These data sets were used as part of a study of chloride in 
                groundwater and surface water in areas underlain by the 
                glacial aquifer system. This data was used in figure 4 of the following report: 
	Mullaney, J.R., Lorenz, D.L., Arntson, A.D., 2009, Chloride in groundwater and surface water in areas underlain by the glacial aquifer system, northern United States: U.S. Geological Survey Scientific Investigations Report 2009-5086, 41 p. http://pubs.usgs.gov/sir/2009/5086/
  Time_Period_of_Content:
    Time_Period_Information:
      Single_Date/Time:
        Calendar_Date: 2002
    Currentness_Reference: 2002
  Status:
    Progress: complete.
    Maintenance_and_Update_Frequency: none planned
  Spatial_Domain:
    Bounding_Coordinates:
      West_Bounding_Coordinate: -176.193602
      East_Bounding_Coordinate: -45.103029
      North_Bounding_Coordinate: 90.000000
      South_Bounding_Coordinate: 28.479311
  Keywords:
    Theme:
      Theme_Keyword_Thesaurus: none
      Theme_Keyword: chloride
  Access_Constraints:  for internal use only -- data has not been reviewed or published. Data is provided as is and user is responsible for checking content
  Use_Constraints:  for internal use only -- data has not been reviewed or published. Data is provided as is and user is responsible for checking content
  Native_Data_Set_Environment: Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 3; ESRI ArcCatalog 9.3.0.1770
Data_Quality_Information:
  Lineage:
    Process_Step:
      Process_Description: These are the steps I used to make the grid of chloride concentrations based on runoff and chloride deposition (both averaged aver the period 1994 to 2002).

            1) use Arctoolbox in arcmap to project chloride grid to match runoff grid.  
               Use Arctoolbox --> Data Management Tools --> Projects and 
               Transformations --> Raster --> Project Raster. Input is chloride 
               grid (cldepkg_ha). Output is new grid name (cldepkgha_p). 
               For Output coordinate system, select the paper icon to the 
               right and choose to import the projection from 
               the hu8time grid. Set cell size to 1000 to match the hu8time grid. 
               (this only works because both the chloride and hu8time runoff grid 
               already have their projections defined)

            2) In Arc workstation, add a new item to the hu8time.vat to hold the 
               average runoff from 1994-2002.
               Arc: additem hu8time.vat hu8time.vat runav94_02 8 8 i

            3) get into tables and calculate the average runoff 1994-2002 for 
               the hu8time grid.

               tables
               Tables: sel hu8time.vat
               2108 Records Selected.
               Tables: calc runav94_02 = ( RUN1994 + RUN1995 + RUN1996 + RUN1997 + RUN1998 + RUN1999 + RUN2000 + RUN2001 + RUN2002 ) / 9
               Tables: q

           4) in grid calculate the expected chloride concentration in mg/sq km per l/year based on runoff and chloride deposition

               grid
               mape hu8time
               setcell 1000
               setwindow hu8time
               exp_cl = ( cldepkgha_p * 100 ) / hu8time.runav94_02
               quit
               
               exp_cl was then clipped to the glacial aquifer system boundary.

      Source_Used_Citation_Abbreviation: D:\Terri\NAWQA_misc\nawqarats\Archive_data_reviews\Mullaney_chloride\archive_review_1\cl_ro_clip
      Process_Date: March 2007
Spatial_Data_Organization_Information:
  Direct_Spatial_Reference_Method: Raster
  Raster_Object_Information:
    Raster_Object_Type: Grid Cell
    Row_Count: 4486
    Column_Count: 6534
    Vertical_Count: 1
Spatial_Reference_Information:
  Horizontal_Coordinate_System_Definition:
    Planar:
      Map_Projection:
        Map_Projection_Name: Albers Conical Equal Area
        Albers_Conical_Equal_Area:
          Standard_Parallel: 29.500000
          Standard_Parallel: 45.500000
          Longitude_of_Central_Meridian: -96.000000
          Latitude_of_Projection_Origin: 23.000000
          False_Easting: 0.000000
          False_Northing: 0.000000
      Planar_Coordinate_Information:
        Planar_Coordinate_Encoding_Method: row and column
        Coordinate_Representation:
          Abscissa_Resolution: 1000.000000
          Ordinate_Resolution: 1000.000000
        Planar_Distance_Units: meters
    Geodetic_Model:
      Horizontal_Datum_Name: North American Datum of 1983
      Ellipsoid_Name: Geodetic Reference System 80
      Semi-major_Axis: 6378137.000000
      Denominator_of_Flattening_Ratio: 298.257222
Distribution_Information:
  Resource_Description: Downloadable Data
  Standard_Order_Process:
    Digital_Form:
      Digital_Transfer_Information:
        Transfer_Size: 114.102
Metadata_Reference_Information:
  Metadata_Date: 20090921
  Metadata_Contact:
    Contact_Information:
      Contact_Organization_Primary:
        Contact_Organization: U.S. Geological Survey
        Contact_Person: John Mullaney
      Contact_Address: jmullane@usgs.gov
        Address_Type: email
  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
