BOREAS Soil Hydraulic Properties: HYD01

7.3 Data Characteristics

7.3.1 Parameter/Variable

The parameters contained in the data files on the CD-ROM are:

         Column Name
------------------------------
SITE_NAME
SUB_SITE
START_DATE
END_DATE
SAT_HYD_CONDUCTIVITY
N_FITTING_PARAM
ALPHA_FITTING_PARAM
SAT_VOL_WATER_CONTENT
RESID_VOL_WATER_CONTENT
BULK_DENSITY
SOIL_TEXTURE
CRTFCN_CODE
REVISION_DATE



7.3.2 Variable Description/Definition

The descriptions of the parameters contained in the data files on the CD-ROM 
are:

         Column Name                             Description
------------------------------ ------------------------------------------------
SITE_NAME                      The identifier assigned to the site by BOREAS, 
                               in the format SSS-TTT-CCCCC, where SSS 
                               identifies the portion of the study area: NSA,
                               SSA, REG, TRN, and TTT identifies the cover type
                               for the site, 999 if unknown, and CCCCC is the
                               identifier for site, exactly what it means will
                               vary with site type.

SUB_SITE                       The identifier assigned to the sub-site by
                               BOREAS, in the format GGGGG-IIIII, where 
                               GGGGG is the group associated with the sub-
                               site instrument, e.g. HYD06 or STAFF, and IIIII
                               is the identifier for sub-site, often this will
                               refer to an instrument.

START_DATE                     The date on which the collection of the
                               reference data commenced.

END_DATE                       The date on which the collection of the
                               referenced data was terminated.

SAT_HYD_CONDUCTIVITY           Saturated hydraulic conductivity of the soil.

N_FITTING_PARAM                The N fitting parameter of the van Genuchten 
                               (1980) function.

ALPHA_FITTING_PARAM            The ALPHA fitting parameter of the van Genuchten
                               (1980) function.

SAT_VOL_WATER_CONTENT          Saturated volumetric water content of the soil.

RESID_VOL_WATER_CONTENT        Residual volumetric water content of the soil.

BULK_DENSITY                   Bulk density of the soil.

SOIL_TEXTURE                   The soil texture (e.g. sand, clay).

CRTFCN_CODE                    The BOREAS certification level of the data.
                               Examples are CPI (Checked by PI), CGR (Certified
                               by Group), PRE (Preliminary), and CPI-??? (CPI
                               but questionable).

REVISION_DATE                  The most recent date when the information in the
                               referenced data base table record was revised.




7.3.3 Unit of Measurement

The measurement units for the parameters contained in the data files on the CD-
ROM are:

         Column Name                                Units
------------------------------ ------------------------------------------------
SITE_NAME                      [none]
SUB_SITE                       [none]
START_DATE                     [DD-MON-YYYY]
END_DATE                       [DD-MON-YYYY]
SAT_HYD_CONDUCTIVITY           [meters][day^-1]
N_FITTING_PARAM                [unitless]
ALPHA_FITTING_PARAM            [meter^-1]
SAT_VOL_WATER_CONTENT          [meters^3 H2O][meters^-3 soil]
RESID_VOL_WATER_CONTENT        [meters^3 H2O][meters^-3 soil]
BULK_DENSITY                   [kilograms][meter^-3]
SOIL_TEXTURE                   [none]
CRTFCN_CODE                    [none]
REVISION_DATE                  [DD-MON-YYYY]



7.3.4 Data Source

The source of the parameter values contained in the data files on the CD-ROM 
are:

         Column Name                             Data Source
------------------------------ ------------------------------------------------
SITE_NAME                      [Assigned by BORIS]
SUB_SITE                       [Assigned by BORIS]
START_DATE                     [Supplied by Investigator]
END_DATE                       [Supplied by Investigator]
SAT_HYD_CONDUCTIVITY           [Supplied by Investigator]
N_FITTING_PARAM                [Supplied by Investigator]
ALPHA_FITTING_PARAM            [Supplied by Investigator]
SAT_VOL_WATER_CONTENT          [Supplied by Investigator]
RESID_VOL_WATER_CONTENT        [Supplied by Investigator]
BULK_DENSITY                   [Supplied by Investigator]
SOIL_TEXTURE                   [Supplied by Investigator]
CRTFCN_CODE                    [Assigned by BORIS]
REVISION_DATE                  [Assigned by BORIS]



7.3.5  Data Range

The following table gives information about the parameter values found in the 
data files on the CD-ROM.

                     Minimum        Maximum        Missng  Unrel  Below   Data
                     Data           Data           Data    Data   Detect  Not
Column Name          Value          Value          Value   Value  Limit   Cllctd
--------------------------------------------------------------------------------
SITE_NAME            NSA-OBS-FLXTR  SSA-YJP-FLXTR  None    None   None    None
SUB_SITE             HYD01-SHP01    HYD01-SHP01    None    None   None    None
START_DATE           01-JAN-1994    01-JAN-1994    None    None   None    None
END_DATE             31-DEC-1994    31-DEC-1994    None    None   None    None
SAT_HYD_CONDUCTIVITY .25            1.91           None    None   None    None
N_FITTING_PARAM      1.1            1.56           None    None   None    None
ALPHA_FITTING_PARAM  .9             9.5            None    None   None    None
SAT_VOL_WATER_       .21            .65            -999    None   None    None
CONTENT
RESID_VOL_WATER_     .01            .17            -999    None   None    None
CONTENT
BULK_DENSITY         1190           1450           -999    None   None    None
SOIL_TEXTURE         N/A            N/A            -999    None   None    None
CRTFCN_CODE          CPI            CPI            None    None   None    None
REVISION_DATE        04-JUN-1998    04-JUN-1998    None    None   None    None
--------------------------------------------------------------------------------
Minimum Data Value -- The minimum value found in the column.
Maximum Data Value -- The maximum value found in the column.
Missng Data Value  -- The value that indicates missing data. This is used to
                      indicate that an attempt was made to determine the
                      parameter value, but the attempt was unsuccessful.
Unrel Data Value   -- The value that indicates unreliable data.  This is used
                      to indicate an attempt was made to determine the
                      parameter value, but the value was deemed to be
                      unreliable by the analysis personnel.
Below Detect Limit -- The value that indicates parameter values below the
                      instruments detection limits.  This is used to
                      indicate that an attempt was made to determine the
                      parameter value, but the analysis personnel determined
                      that the parameter value was below the detection
                      limit of the instrumentation.
Data Not Cllctd    -- This value indicates that no attempt was made to
                      determine the parameter value.  This usually
                      indicates that BORIS combined several similar but
                      not identical data sets into the same data base table
                      but this particular science team did not
                      measure that parameter.

Blank -- Indicates that blank spaces are used to denote that type of value.
N/A   -- Indicates that the value is not applicable to the respective column.
None  -- Indicates that no values of that sort were found in the column.
--------------------------------------------------------------------------------

7.4 Sample Data Record

SITE_NAME,SUB_SITE,START_DATE,END_DATE,SAT_HYD_CONDUCTIVITY,N_FITTING_PARAM,
ALPHA_FITTING_PARAM,SAT_VOL_WATER_CONTENT,RESID_VOL_WATER_CONTENT,BULK_DENSITY,
SOIL_TEXTURE,CRTFCN_CODE,REVISION_DATE
'NSA-OBS-FLXTR','HYD01-SHP01',01-JAN-1994,31-DEC-1994,.46,1.15,1.5,.65,.17,1300,
'Clay','CPI',04-JUN-1998
'NSA-OJP-FLXTR','HYD01-SHP01',01-JAN-1994,31-DEC-1994,.77,1.35,8.7,.21,.01,1450,
'Sand','CPI',04-JUN-1998
