Laserfiche WebLink
SPDSS Memorandum <br />Final <br />To: Ray Alvarado and Ray Bennett <br />From: LRE -Erin Wilson and Beorn Courtney <br />Subject: Task 62 -Review IDSCU (formerly SPMAP) <br />Date: March 9, 2005 <br />Introduction <br />The IDSCU (formerly SPMAP) model was developed by Colorado State University with input <br />and guidance from water users in the lower South Platte River basin, including Northern <br />Colorado Water Conservancy District (NCWCD) and the State of Colorado, as part of the <br />Integrated Decision Support modeling package. IDSCU was developed by starting with the <br />same Fortran program used for CRDSS in 1996 and RGDSS in 1999. The focus of the IDSCU <br />model has been estimation of crop consumptive use and associated augmentation requirements <br />by irrigation field(s) while the focus of StateCU is to estimate basin-wide consumptive use by <br />ditch system(s). The IDSCU model offers many of the same analysis options as StateCU, <br />however, both the IDSCU model and StateCU offer unique analysis features. This memorandum <br />provides a review of the IDSCU documentation and functionality. <br />Approach and Results <br />Review of the IDSCU model included attending the IDSCU Workshop on May 18, 2004, <br />discussing questions with IDSCU developers Luis Garcia and David Patterson, and comparing <br />IDSCU and StateCU potential consumptive use estimates. Both IDSCU and StateCU were run <br />using the modified Blaney-Griddle and ASCE Modified Penman Monteith methods. Initially, <br />there were differences in results using the daily ASCE Standardized Penman-Monteith method. <br />IDSCU developers worked with LRE to identify and resolve problems with the IDSCU model <br />until the models produced the same results with both monthly modified Blaney-Griddle and daily <br />ASCE Standardized methods. The resulting estimates of potential consumptive use were found <br />to be the same. <br />Through this review, several useful functions that are not available with the StateCU Graphical <br />User Interface (GUI) were identified in the IDSCU GUI (summarized in Table 1 below): <br />Upon opening the IDSCU GUI, the program checks the IDS website for any updates <br />to the model. If there has been an update since the program was last saved to the <br />location from which it is being run, the user is notified and given the opportunity to <br />download the updated model. <br />IDSCU allows the user to add and edit information directly through the GUI. <br />- A "modeling area" (equivalent to a "CU Location" in StateCU) can be added and <br />defined directly through the GUI. For CDSS, a new CU location can only be <br />added through StateDMI. <br />