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<br />iOUuJ09 <br /> <br />software will be controlled through formalized quality reviews at 2-month intervals. The <br />PRSYM model code and application will be thoroughly documented through the preparation <br />of a Technical Overview, User's Manual, Programmer/Maintainer's Manual, and Summary H \ <br />II Q'\Iil"- 5 <br />of Applications. <br /> <br />Resident Site-Soecific Models. The DSS will also include site-specific models to address <br />scheduling or operational issues at individual power plants or specific river reaches. For the <br />TV A system, some examples include a diffuser mixing model at a nuclear power plant and a <br />simplified economic model to evaluate the benefits of using cooling towers vs flow <br />augmentation to meet environmentailirnits at a thermal plant. Other site-specific models <br />could include water quality models at critical river reaches or detailed routing models at <br />particular locations. The DSS will allow for the incorporation of site-specific models <br />relevant to individual utilities or water resource agencies. <br /> <br />Non-Resident Models <br /> <br />Utility staff and reservoir operators expressed the need to use existing utility-specific models <br />in conjunction with the DSS. Examples of such models include hydrologic and streamflow <br />forecasting models, reservoir and power system operational and/or planning models, and <br />detailed water quality models. These models are often complex, dependent on large <br />historical databases, and useable only by highly trained personnel. <br /> <br />To preserve the generic nature of the DSS, while facilitating access to the results of such <br />models, these models will not be directly integrated into the DSS but will be considered 'off- <br />line' or 'non-resident' models. Appropriate connections (referred to as Data Management <br />Interfaces (DMIs)) will be developed to enable sharing of input and output data between the <br />non-resident models and the DSS. DMIs will also be developed to facilitate data exchange <br />with large historical databases. Exchange of data between the non-resident models/data and <br />the DSS will facilitate the use of the DSS visualization and analysis tools and the <br />incorporation of non-resident model results into the decision making process. <br /> <br />Although the majority of non-resident models will be utility-specific, a generic framework <br />for hydrologic modeling will be accessible through a window from the DSS. The Modular <br />Modeling System (MMS), jointly developed by CADSWES and the U.S. Geological Survey, <br />will provide this general methodology for hydrologic modeling. <br /> <br />Documentation must be provided that describes the target data structure within the DSS that <br />accepts data from the non-resident models and data files. The procedure for obtaining data <br />from the DSS for use with non-resident models must also be documented. <br /> <br />S-3 <br />