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Information Technology Supports Integration of Satellite Imagery with Irrigation Management in California's Central Valley

Published by the American Society of Agricultural and Biological Engineers, St. Joseph, Michigan

Citation:  5th National Decennial Irrigation Conference Proceedings, 5-8 December 2010, Phoenix Convention Center, Phoenix, Arizona USA  IRR10-9645.(doi:10.13031/2013.35877)
Authors:   Lee F Johnson, Rama Nemani, Forrest Melton, Andy Michaelis, Petr Votava, Dong Wang, Tom Trout
Keywords:   Remote sensing, Landsat, crop coefficient, evapotranspiration, TOPS

Remotely sensed data can potentially be used to develop crop coefficients over large areas and make irrigation scheduling more practical, convenient, and accurate. A demonstration system is being developed under NASA's Terrestrial Observation and Prediction System (TOPS) to automatically retrieve and pre-process appropriate satellite imagery, calculate vegetation index values, convert to estimates of fractional cover and crop coefficients, and deliver or archive the output maps. A user interface will allow convenient retrieval of spatially explicit crop coefficient estimates (e.g., individual fields, irrigation district) for combination with reference evapotranspiration (ETo) and other supporting datasets for derivation of crop ET. The system is intended to eventually support practical irrigation scheduling based on climatic information (as from the California Irrigation Management Information System) for more accurate irrigation water applications that meet crop water requirements

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