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Vegetation water use determined with energy balance models coupled with airborne multispectral imagery and weather data

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dc.contributor.authorChávez, José L., author
dc.contributor.authorColorado State University, publisher
dc.date.accessioned2020-02-12T17:22:52Z
dc.date.available2020-02-12T17:22:52Z
dc.date.issued2012
dc.description2012 annual AGU hydrology days was held at Colorado State University on March 21 - March 23, 2012.
dc.descriptionIncludes bibliographical references.
dc.description.abstractFrequent estimates of spatially distributed vegetation water use or evapotranspiration (ET) are essential for managing water resources in irrigated regions and for general hydrologic processes modeling. In this study, two energy balance based algorithms were used to map ET. Both methods require weather data from standard agricultural weather stations. One method was METRIC (Mapping ET at high Resolutions with Internal Calibration), which was originally developed for applications with Landsat images. The second method was a surface aerodynamic temperature-based (SAT) ET method. METRIC and SAT derived ET values were compared to ET values from weighing lysimeters. As part of this experiment, high resolution aircraft imagery (0.5 m pixel size in the visible and near infrared bands and 2 m in the thermal band) were acquired. During the overpasses, ground truth data were collected for surface short-wave reflectance and long-wave thermal emittance, crop parameters, soil heat flux and net radiation. In general, METRIC performed better on well irrigated fields with the presence of large uniform biomass stands while the SAT method resulted with slightly larger errors under similar surface and climatological (including advection) conditions.
dc.format.mediumborn digital
dc.format.mediumproceedings (reports)
dc.identifier.urihttps://hdl.handle.net/10217/201014
dc.identifier.urihttp://dx.doi.org/10.25675/10217/201014
dc.languageEnglish
dc.language.isoeng
dc.publisherColorado State University. Libraries
dc.relation.ispartofHydrology Days
dc.rightsCopyright and other restrictions may apply. User is responsible for compliance with all applicable laws. For information about copyright law, please see https://libguides.colostate.edu/copyright.
dc.titleVegetation water use determined with energy balance models coupled with airborne multispectral imagery and weather data
dc.title.alternativeHydrology days 2012
dc.title.alternativeAGU hydrology days 2012
dc.typeText

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