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Model for calculating consumptive use (IDSCU)

Date

2009-11

Authors

Garcia, Luis A., author
Patterson, David, author
U.S. Committee on Irrigation and Drainage, publisher

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Abstract

The Integrated Decision Support Group at Colorado State University has been working with a group of water users from the South Platte in Colorado to develop different tools to meet their modeling and data needs. As part of this effort a consumptive use model called the Integrated Decision Support Consumptive Use Model (IDSCU) has been developed. The model calculates water use using multiple ET equations, can compare the results of different ET equations, and shows how water supplies and weather combine to form the depletions of ground and surface water for each modeling area. Users can enter water supplies from multiple sources such as wells or ditches. IDSCU can generate an irrigation schedule based on the user-supplied information such as crop characteristics, soil characteristics and crop rooting depth. IDSCU can also be used to determine the amount of groundwater irrigation that is required if the user has surface water that is augmented by well water. The model has the ability to access weather data on the internet from Coagmet (Colorado), Northern Colorado Water Conservancy District (Colorado), ET Toolbox (New Mexico), AZMET (Arizona) and CIMIS (California). The user can setup templates with weather and crop information for an area, which can be used as the basis for new datasets covered by the same area. Templates store crop characteristics, crop coefficients, water supplies from ditch diversion records and weather information. It can be downloaded from the web www.ids.colostate.edu/projects/idscu. The presentation will give an overview and provide examples of applications of the model.

Description

Presented at the fifth international conference on irrigation and drainage, Irrigation and drainage for food, energy and the environment on November 3-6, 2009 in Salt Lake City, Utah.

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