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. 7.0 The What If? Menu 7.2.1 Layout The Lag/Loss Editor dialog consists of a list of river and tributary reaches arranged alphabetically along with their associated lag and loss values. In addition to the reach list is a set of bunons which allows the user to perform functions on the current set of lag/loss val- ues (those used in curtailment and relaxation analyses), such as load- ing values from a previous day, saving the current values to the SPWRMS database, and resetting current values to the default values. 7.2.2 Current & Default Lag!Loss Current values for lag and loss are used when the user performs a cur- tailment or relaxation analysis. Default values were provided by SEO and are displayed only for reference. These values represent average conditions based on stream characteristics or from known flows. Current values are loaded from the database only if a saved set exists for the day when the user starts the application. Otherwise, if there is no set of current values in the database for that day, the application uses the default values. The user may load current values from a pre- vious date, modify them, and save them as the present day's values. Alternatively, current values can be loaded from a past date, modi- fied, and used as values. to perform curtai1ment/relaxation analyses without saving these values to the database as the present day's val- ues. 7.2.3 Loading LaglLoss Data To load lag/loss values from a previous date, type the date from which to load data in the Load Values From field and cli4Jhe Load bunon. If no set of values are available for the specified day, you will be notified and the current set will remain unchanged. Otherwise, the data from that day will be loaded and displayed and can then be used to perform curtailment and relaxation analyses. Because the designated South Platte reaches cross district boundaries and because all reaches are used in curtailment / relaxation analysis, the SPWRMS application does not separate the reaches out by water district. Since the Lag/Loss Editor loads and displays all reaches within the entire basin, the database access time for loading and sav- ing these data may be longer than anticipated. 7.2.4 Editing Current Lag!Loss Data To edit the currentlag/loss values for a reach, double.dick on the reach in the Lag/Loss Editor dialog to bring up the Edit Lag/Loss Reach dialog. "'7,,.... '^'"