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<br />OO.~151 <br /> <br />The RESERV parameter stores the previous ending month's (i.e., initial month's begin- <br />ning) contents for each reservoir. The FORCMAX parameter is used to define the amount <br />to be added during the January through July period to the mean current month through <br />July forecast for inflow to Lake Mead to determine the maximum of the forecasts, in <br />computing flood control releases from Hoover. The FRCREL parameter stores the <br />schedule of forced monthly releases for specified reservoirs. The TRGCON parameter is <br />used to establish monthly target contents for specified reservoirs. The FRMENE param- <br />eter is the schedule of firm or scheduled energy. The UMAINT parameter is the scheduled <br />percent availability of generating capacity at specified powerplants. The DIVSCH param- <br />eter is used to input projected diversion schedules for each month. The INFLOW param- <br />eter is used to provide the forecasted inflows into the basin. <br /> <br />If other parameters or input data need to be modified, the user would need to use a text <br />editor outside of the interface, at the operating system level. An outcome of this limitation <br />is that it focuses the casual user on only the most important input parameters of the <br />24MSM. In effect, this is a simple but powe1ful way to limit the amount of knowledge a <br />potential user needs to run the 24MSI. Also, by controlling the interaction with the control <br />(input) file, i.e. both the parameters that can be touched and the formatting of the values, a <br />large majority of the errors in running the 24MSM as it was operated previously to this <br />project will be eliminated. <br /> <br />5.4 GRAPH module <br /> <br />The GRAPH DISPLAY module provides the functionality to display both the input and <br />output parameters graphically. This provides the graphical depiction of temporal (line and <br />histogram plots) and systematic change (bar plots), providing a means of rapid qualitative <br />assessment of the data. The user can also "inspect" the graphs with the mouse, obtaining <br />the exact numerical values for the data, giving quantitative access to the data. Also, the <br />legend provides a summation of the values on a per parameter basis for the chosen time <br />period. This provides quick access to summation values by water year or calendar year. <br />Multiple parameters (having the same units) can be displayed on the same graph to allow <br />for comparisons of data. Up to three graphs may be drawn on the screen at any given time. <br />If the input parameters are displayed in either a line plot or histogram format, the user may <br />interactively select a parameter and edit its value graphically. <br /> <br />Additionally, the script template serves as a form in which the user fills in the require- <br />ments for a specific graph. The user thus chooses the desired parameters, reservoirs, and <br />temporal ranges from an exhaustive set, and thus all possible combinations (that make <br />sense) are permitted. The script template can be saved and later accessed by the user to <br />provide rapid access to common graph displays and in a sense captures knowledge of the <br />power users that can be used by the casual user. Inherent in the 24MSM are many special <br />cases, where parameter/reservoir combinations only make sense for certain instances. To <br />provide a means of displaying the possible valid combinations, as well as explicitly <br />displaying the invalid combinations, a decision matrix menu was developed. The decision <br />matrix consists of a two dimensional table, with the reservoirs and parameters on the two <br />axes, and allows the user to select a cell (a location of row/column intersection) repre- <br /> <br />24 Month Study Project Doauncntation Volume I <br /> <br />618/91 <br /> <br />8 <br />