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000052 TECHNICAL CORRECTNESS: BASIS: USER INTERFACE: BASIS: MODSIM V STATEMOD VVV It is a necessity that the CRDSS water resource planning model be technically correct in the allocation of water according to priority, in the calculation of return flows and in the operation of special operations such as project releases from storage, exchanges, and instream flows. In the reviewed MODS 1M model instances were found where a junior priority diverted large amounts of natural flow while downstream senior water rights were shorted. It was also found in the MODSIM model instances where demands tied to supplemental reservoir supplies were shorted even though those supplies existed and were deliverable. Proper operation of ST ATEMOD (allocation of water by priority, exchanges. reservoir project releases, etc.) has been tested and no problems are known to exist in the current ST A TEMOD prototype. MODSIM VV STATEMOD V MODSIM has been developed for use with the current SIM interface. This interface allows users to visually see a basin schematic of demands and reservoirs, add demands and reservoirs and associated information, execute the model, and graphically see the simulation results, Concerns of the DNR team on the current interface include I) difficulty of creating a understandable basin layout, 2) poor organization of data sheets, 3) execution time (40 seconds to graph one item) for datasets related to the entire study period, 4) inability to present tabular results along with graphs inside the interface, 5) lack of portability to a PC platform, and 6) maintainability of approximately 20,000+ lines of C code associated with the interface, ST A TEMOD does not have a graphical user interface. It is operated from the command line with batch menus to perform model functions such as execution and reporting. The DNR team has asked the consultant team to help identify the costs that may be involved in developing a graphical user 3