Laserfiche WebLink
A report documenting the dependent and independent station selection over time, corresponding <br />correlation coefficients, and basic statistics on the original and filled data is generated by the gui <br />(*.sum). The mixed station program provides all of the information in its summary output file. <br />The report is basically a reformatted version of this file for easier viewing. This report also <br />shows the number of data values filled from stations within the basin and the number of data <br />values filled using stations in other basins. <br />Results that allow the goodness of the fill to be evaluated on a monthly, annual, and basin total <br />basis, are provided in the summary statistics file (*.sts). A separate program was written to <br />allow the computation of basic statistics on the original and filled data series. These statistics <br />include mean, standard deviation, skewness coefficient and lag-1 serial correlation coefficient. <br />One subroutine, written by dr. Jose salas of the Colorado state university, (salas et.al. 1995) was <br />used for calculating the mean, standard deviation, skewness, and annual lag-1 serial correlation <br />coefficient. In addition a separate subroutine was written to allow calculation of the monthly <br />lag-1 serial correlation. Also, the program computing the statistics of the filled data identifies <br />any data that was not filled by the msm and allows the user to fill those missing values with <br />monthly mean values. <br />Finally, the gui produces baseflow files for each basin with all of the missing data filled in <br />(*.xbf). The format is basically the same as the *.xbg file, with some additional header <br />information, allowing the file to be tracked and reproduced, if necessary. <br />Operation of the GUI <br />The resulting program that runs the mixed station model and computes the summary statistics <br />runs with a Windows GUI. The screen allows the user to select the options in the mixed station <br />model to run and executes the Mixed Station Model. Then the GUI allows the user to compute <br />the summary statistics for the filled data. Figure 1 shows the GUI screen that is used for the <br />model. <br />A separate screen is displayed to allow the user to select the output files desired. This screen is <br />shown in Fi ure 2. The user has the option to create files of any portion of the output desired. <br />Only the filled data file must be created in order to allow generation of the *.sum , *.sts and <br />*.xbf files. <br />Fi ure 3 shows the general flow chart for the operation of the GUI. This figure identifies the <br />intermediate files that are created by the GUI and how it utilizes the MSM and Statistics Fortran <br />programs. The figure shows the GUI first starts with the user selecting 1 to 5 *.xbg files for data <br />filling (file button). Then the model consolidates those files for use in the MSM program. The <br />MSM program is then run (run button) and the two output files are created, the filled data set and <br />the summary report (fillin.out and fillin.sum). <br />The GUI (save button) then splits the data and summary file into individual data and report files <br />for each basin analyzed (*.xbf and *sum files). It also creates the data files of unfilled and filled <br />data for the statistical analysis program. Then the statistical program is run and it creates the <br />output file summarizing comparison statistics for each station filled. The GUI then creates <br />individual basin reports with the summary statistics. This then is output as *.sts files. <br />Appendix E E-113 <br />