| Project: COL00707 |
Department: Civil & Environmental Engineering |
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PIs: Garcia, LA |
| Title: South Platte Mapping and Analysis Program (SPMAP): Remote Sensing, Consumptive Use and Augmentation Accounting |
| Begin Date: 07/01/2008 |
Term Date: 06/30/2011
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Most recent project status:
Revised
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| Objectives: The South Platte Mapping and Analysis (SPMAP) effort has been highly successful and the computer tools that have been developed are widely used by water users and consultants. There are additional needs to continue to enhance the tools as well as incorporate new technology. This funding would allow us to enhance the consumptive use model (IDSCU) and continue to develop a new model for calculating remote sensing of Evapotranspiration called ReSET (Remote Sensing of ET). A number of tools will be developed in ArcGIS that will allow the user to build In datasets from layers that contain irrigated acreage data. These tools will be used to generate ET estimates based on the traditional ET equations using IDSCU or for comparison with output from ReSET. The IDSCU is a consumptive use model that IDS has developed that is currently receiving an increased level of attention. Some needed enhancements to the model are the ability to allow the users to enter well meter records and to track how much of the well water in the water budget is consumed or returns back to the South Platte, updating how daily effective rain is calculated, and how frost impacts perennial crop growth. The interface will also be expanded to read input data and write output data from different types of spreadsheets and databases. |
| Approach: This project will follow a 'User-centered DSS Development Approach'. This approach is an interactive and dynamic development process in which the users play an integral part. Using this approach, the stakeholders define their data and modeling needs. The defined needs are then evaluated and the tools required to meet the needs are determined. The databases and tools are developed in a way that is open and transparent to everyone. The models are data driven and allow for the evaluation of many different alternatives and scenarios. Cooperatively, the users and developers decide the number of alternatives and scenarios that it is reasonable for the software to accommodate. The development process is designed to allow for broad stakeholder participation in the creation, testing and implementation of the tools. Currently major concerns of the State Engineer's Office are that water users use a methodology that is valid, transparent and consistent to provide monthly reports on augmentation requirements and that they provide these reports in a timely fashion. Remote Sensing of ET (ReSET): A model called Remote Sensing of Evapotranspiration (ReSET) has been developed by IDS (Elhaddad and Garcia, 2008 in press) that uses Landsat 5/7 imagery. The ReSET model estimates the "actual" ET which takes into consideration factors such as water stress, salinity, pests, agricultural practices, etc. Since most of the ET estimates are based on ET equations that use weather station data and crop coefficients, models like IDSCU do not take into account actual field conditions. The remote sensing of ET has received a lot of interest in the water community in the South Platte. The goal is to use the results of ReSET to compute the reduction of ET based on deficit irrigation, develop crop coefficients based on growing degree days, estimate impacts on ET due to salinity using the project with USBR and NCWCD, and to compare the differences in estimating ET using a traditional model such as IDSCU. IDSCU The IDSCU is a consumptive use model that IDS has developed that is currently receiving an increased level of attention. This provides a great opportunity to have the model be used more extensively as well as for it to be accepted by the Water Court and the State Engineer. Some needed enhancements to the model are the ability to allow the users to enter well meter records and to track how much of the well water in the water budget is consumed or returns back to the South Platte, updating how daily effective rain is calculated, and how frost impacts perennial crop growth. The interface will also be expanded to read input data and write output data from different types of spreadsheets and databases. AWAS AWAS continues to be widely used and users continue to request enhancements and minor bug fixes. One enhancement to the model would be to add the ability to use the new outputs from IDSCU. Other changes to the model include expanding the use of uniform return flow values so that they can be used on either a daily or monthly scale. |
| Keywords: Remote Sensing of ET,
Consumptive Use,
Decision Support Systems,
South Platte |
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