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<br />Oil - "'''(]' <br />:"v.::t> <br /> <br />on a near real-time basis, Models, such as the mid-term Colorado River operations model (the <br />24-month study model) will be able to access data directly through Data Management Interfaces <br />(DMI's). The DSS will present a consistent view of both historical and model-projected data <br />through a graphical user interface (GUI) , <br /> <br />long,Term <br />Models <br /> <br />Statistical <br />Analysis <br /> <br />(CRSS <br />replacement) <br /> <br />(SoPlus) <br /> <br />Dally Models <br /> <br />DMI I I <br /> <br />Data Management System <br /> <br />Mid-Term <br />Models <br />(24-Month <br />Study) <br /> <br />CRDB <br />Database <br /> <br />Query <br />and <br />Display <br />of Data <br /> <br />(INGRES) <br /> <br />Other <br /> <br />I I <br />Real-11me <br />Raw Data SCADA <br />Processing <br />Hydromel <br />(SUTRON) <br /> <br />T elemotry <br />Data <br /> <br />Data <br /> <br />Figure 1 Data-centered decision support system currently being implemented in the Upper <br />and Lower Colorado Regions. <br /> <br />We wish to define some concepts with respect to models to facilitate discussion, We defme a <br />dedicated or site-specific model as one that has been written to solve a particular problem and <br />cannot be used for other (perhaps even very similar) problems. The Colorado River Simulation <br />System (CRSS) and the 24-month study model are examples of such models, A generic or <br />general-purpose model is one that utilizes the fact that the behavior of the systems being modeled <br />is governed by the same physical principles. Systems are then modeled by providing the <br />specific data for that system. The Anny Corps of Engineers HEC models are examples of <br />general-purpose models, Models that are completely integrated into the DSS (i,e" are callable <br />from the DSS interface) are termed resident models, Models that are run separately. although <br />they utilize the database, are termed non-resident. Models that exist entirely on their own (do <br />not utilize the DSS database) are termed standalone. The current CRSS is an example of a <br />dedicated, standalone model. <br /> <br />4 <br />