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<br />November 14, 1996 <br /> <br /><>-.f <br />I <br /> <br />When SAMSON was developed, the data driven approach was not a common practice. Therefore, <br />some of the conditions it uses for modeling are built into the source code and cannot be specified <br />by the user. This makes it very difficult to update and modify the code. The model attempts to <br />model all process that take place in the basin in a single program (e.g. water rights, consumptive <br />use, groundwater, etc.). This makes the code extremely complex and very difficult to manage. <br /> <br />In Summary, when the SAMSON model was originally developed, the modeling philosophy was <br />geared toward a one time comprehensive model run, which was standard practice. However, current <br />modeling approaches emphasize building smaller independent and data driven components that <br />deal with one task such as consumptive use. Data Interchange mechanisms can be used to assemble <br />different components into a DSS framework. <br /> <br />SAMSON provided a valuable service by proving that surface and groundwater could be modeled <br />as a combined system, even in such a complex system as the South Platte River Basin. The model <br />was instrumental in the development of modeling for the South Platte, but as with many computer- <br />based tools newer advances have made the use of the complete system impractical. Components <br />of SAMSON could be used as part of a future DSS, butthese components would need to be separated <br />from the main program, and some of the computer code might need to be modified in the light of <br />current modeling approaches. <br /> <br />0', <br />.", <br />'.~;';CD <br />..-0 <br />.... .. <br /> <br />Sincerely, <br /> <br /> <br />/- <br /> <br />\ '.. <br />\ \ <br />Forrest Leaf \ \ <br />Central Colorado Water lS:giIservancy Dist. <br /> <br /> <br />Ray Bennett <br />State Engineers Office (Denver) <br /> <br />~1(~ <br /> <br />James Hall <br />State Engineers Office (Greeley) <br /> <br />ck~ ({JAr <br /> <br />Jack Odor <br />Groundwater Appropriators of the South <br />Platte <br /> <br />Integrated Decision Support Group (IDS) <br />410 University Services Center <br />Colorado State University <br />Fort Collins, CO 80523 <br />Phone: (970) 491-7620 Fax: (970) 491-2293 <br />