GIDS-1 TVA Dam Discharge Dataset 
     
     
     1.0  General Description
     
          This is one of three hydrological datasets provided as part of the
     GEWEX Continental-scale International Project (GCIP) Initial Dataset One
     (GIDS-1). The GIDS-1 Tennessee Valley Authority Dam Discharge dataset
     contains data from approximately 45 sites in Tennessee, Kentucky, North
     Carolina and surrounding states. This dataset covers a subset of the
     complete GIDS-1 area which is approximately 85W to 106W longitude and
     30N to 45N latitude. The TVA Dam Discharge dataset contains data values
     of hourly turbine discharge and total discharge reported for the complete
     GIDS-1 time period from 01 February 1992 through 30 April 1992. No
     additional quality control (QC) was performed on this dataset by the
     UCAR/Office of Field Project Support (UCAR/OFPS).
     
     2.0  Detailed Data Description
     
          The TVA Dam Discharge dataset is provided in the same format 
     in which it was received. These data are in a single file which contains
     alternating header records and data records. The user must carefully review
     this dataset to locate and note the several different types of header
     records. The header records immediately preceding the data records indicate
     the stations for which the data are valid.  The data records are also very
     unique, and the user must examine the data before using this dataset. Each
     data record contains data collected for several stations. The data values
     are reported in cubic feet per second and are average values for the
     preceding hour. These hourly averages are valid for hours 01 to 24 local
     time. The table below details the order and description of each data 
     parameter in a record.  Note that the observation number is a number
     internal to the dataset and has no relation to any station identification 
     number. The observation number repeats in sets of six data lines until the 
     data values for a particular date have been listed for all stations. Be 
     aware that the observation number is reset to one approximately two-thirds 
     of the way through the dataset. Not all stations report both Total and 
     Turbine Discharge values. The Turbine and Total Discharge parameters
     described below are repeated from one to thirteen times in a single data 
     line.
     
     
     Parameters               Units (C format)
     
     OBS                      Observation number (Unitless)
                              (`%6d ').
     IDATE                    Local date of observation
                              (YYMMDD) (`%6d   ').
     IHOUR                    Local Hour of Observation
                              (`%2d  ').
     name_TU                  Turbine Discharge in Cubic
                              Feet per second for station
                              whose ID is 'name'. ('%7d ')
     name_TO                  Total Discharge in Cubic
                              Feet per second for station
                              whose ID is 'name'. ('%7d ')
     
     2.1  Data Remarks
     
          Not all stations report both Total Discharge and Turbine Discharge
     each hour.
     
          If the Total Discharge is '9999999' then the actual Total Discharge
     is the same value as the Turbine Discharge value.
     
          Times reported are local time and days begin at local hour 1 and
     end at local hour 24.
     
     
     2.2  Sample Data
     
          The following is a sample of one type of header record in the TVA
     Dam Discharge dataset. Since these header records indicate the stations for
     which the data is valid, there are many unique header records. Also, there
     are general title header records at approximately every 50 lines in this
     dataset. The user must carefully review this dataset prior to using it.
     Unlike this example, there are no carriage returns in the data. See
     section 2.0 for a detailed data description.
     
        OBS  IDATE IHOUR SHOL_TU SHOL_TO WATA_TU WATA_TO
     WILB_TO BOON_TU BOON_TO FTPAT_TU FTPAT_TO CHER_TU
     CHER_TO DOUG_TU DOUG_TO
     
          The following is a sample of the TVA Dam Discharge data. Unlike
     this example, there are no carriage returns in the data. See section 2.0
     for a detailed data description.
     
           1 920201    1        0 9999999       0 9999999      56       0 9999999 
        945 9999999        0 9999999       0 9999999
     
     
     3.0  Quality Control Processing
     
          No additional quality control (QC) was performed on this dataset
     by the UCAR/Office of Field Project Support (UCAR/OFPS).
     
     4.0  References
     
          For additional station information, refer to the station list
     provided as a seperate dataset in CODIAC.