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IDSCU The IDSCU Model is a data driven model that allows the users to calculate the ET using a number of different ET methods (monthly and daily). Some of the capabilities of the model are: 1) allows the user to project ET into the future or the past based on historical data, 2) allows the user to ac- cess HYDROBASE to develop diversion records, 3) can use access or dbase tables to create input datasets, 4) computes a complete water budget, 5) allows the users to compare CU values computed with different ET methods (this informa- tion can be used to develop calibrated Blaney - Criddle crop coefficients), 5) evaluates the application efficiencies of wells by comparing depletions of groundwater computed using a water budget with pumping records multiplied by a presump- tive depletion factor, and 6) allows user to export the CU of groundwater into IDS AWAS. IDS AWAS IDS Alluvial Water Accounting System (IDS AWAS). IDS AWAS provides users the option of calculating river deple- tions using The Analytical Stream Depletion method devel- oped in 1987 by Dewayne R. Schroeder, a method which uses analytical equations described by Glover (Glover 1977) and others. The model allows users to calculate depletions using daily or monthly time steps. The user has the option to evaluate a number of different boundary conditions (alluvial, infinite, no flow and effective SDF). IDS AWAS can create model input in two ways: 1) each well has a list of pumping records consisting of a pumping rate and duration (original mode), or 2) input records consist of net consumptive use or recharge in a daily or monthly time step. Year type can be set to calendar, irrigation, or USGS. Data can be projected into the future or past based on historical data, and the effect of turning off the well by specifying an end date beyond the period of record can be simulated. Conclusions This collaborative effort involving water user groups and IDS is an excellent example of how a number of diverse users can contribute to the development and use of common computer tools which can benefit all. The Lower South Platte is a critical resource for agricultural production and for overall Colorado water policy. The alluvial South Platte aquifer conjunctive use systems (ground and surface water) have a history of use that is unique in the United States. The SPMAP project with its unique approach provides a set of tools that can be used for a myriad of applications required by water managers on the Lower South Platte. A completion report for the current phase of SPMAP development is being published by CWRRI and will be available soon. A new phase of the project will be started this year to further identify data and tool development needs, as well as improv- ing the usefulness of existing tools. The tools developed as part of this project can easily be incorporated into a larger structure or additional modules /models can be incorporated into the existing structure developed for this project. SPMAP tools provide practical tools for water managers to meet future challenges in managing a complex system to meet increasingly complex goals. The software and documentation is provided on the internet at: http: / /www.ids.colostate.edu/ projects References Colorado Water Conservation Board (2000b). South Platte Decision Support System (SPDSS): An Overview. HTML document, viewed from http: / /cdss.state.co.us on December 20, 2000. Kuhnhardt, H. and Darrell G. Fontane, (1995). "Initiating a Water Management Decision Support System for the South Platte River Basin ", Colorado Water Resources Research Institute Water in the Balance Report, No. 2. Klein, Kathleen C., ed. (1994). "Seeking an Integrated Approach to Watershed Management in the South Platte Basin ", Proc. of the 1993 South Platte Forum. 26 -27 Oct. 1994, Greeley. Colorado Water Resources Research Institute. McCarthy, Paddy and Adam Light, (1995). "South Platte Water Rights Management System ", Colorado Water Resources Research Institute Water in the Balance Report, No. 4. Raymond, John H., Luis A. Garcia, and Robert Lange (1996). "Evaluation of SAMSON for Use in a South Platte Decision Support System ", Colorado Water Resources Research Institute Completion Report No. 191. Warner, James W., Jon Altenhofen, Jack Odor, and Brandon Welch (1994). "Recharge as Augmentation in the South Platte River Basin ", Colorado Water Resources Research Institute Technical Report, No. 21. Grigg Honored by CSU Alumni Association as 2005 Distinguished Faculty Neil Grigg received the Distinguished Faculty Award from the Colorado State University Alumni Associa- tion. He earned his doctorate in civil engineering in 1969 and joined the CSU faculty in 1972. His research and ex- pertise in water resource planning and management, public 6 works infrastructure management, water law, urban water systems and disaster preparedness have earned him the respect and recognition of professional organizations and international colleagues. His network of previous graduate advisees extends to more than 30 nations. j 1