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where NETEVAP is the net evaporation time series, <br />A is the evaporation constant, and <br />B is the precipitation constant. <br />4.Determine the average monthly evaporation by summing the net evaporation for each month of each <br />year and dividing by the total number of years. <br />X <br />NETEVA P <br />j <br />= <br />= <br />y 1 <br />M NE <br />Equation 4 <br />j <br />X <br />where MNE is the mean net evaporation for month j, <br />y is the year, and <br />X is the total number of years. <br />5.An output text file (<resname>.evp) will be created containing either the historical time series of net <br />evaporation or the 12 average net evaporation values (one for each month) in the user-specified <br />output units. The file <resname>.evp will be read directly by the water rights planning model <br />interface. Each output file will contain a header card with the reservoir ID, data type, units, and the <br />dates of the time series. An example average monthly file for Taylor Park is shown below. The <br />month corresponds to the first value in the data column and corresponds to the last value <br />Oct Sept <br />in the data column. <br />#TaylorPk net evaporation feet Oct-Sept <br />0.25 <br />0.10 <br />0.10 <br />0.05 <br />0.01 <br />0.01 <br />0.01 <br />0.06 <br />0.14 <br />0.23 <br />0.30 <br />0.27 <br />An example historical time series for Reservoir 1 is shown below. The date corresponds to <br />Oct 1950 <br />the date of the first value in the time series data column and corresponds to the date of the <br />Sept 1990 <br />last value in the time series data column. <br />#Reservoir_1 net evaporation feet Oct 1950 - Sept 1990 <br />0.25 <br />0.10 <br />0.10 <br />0.05 <br />0.01 <br />0.30 <br />0.27 <br />. <br />. <br />4 <br />A275 01.09.95 1.15-12 Ritsch <br />