Persistent Link:
http://hdl.handle.net/10150/301223
Title:
Error Analysis of Evapotranspiration Measurements
Author:
Hartman, Robert K.
Affiliation:
University of Arizona
Issue Date:
12-Apr-1980
Rights:
Copyright ©, where appropriate, is held by the author.
Collection Information:
This article is part of the Hydrology and Water Resources in Arizona and the Southwest collections. Digital access to this material is made possible by the Arizona-Nevada Academy of Science and the University of Arizona Libraries. For more information about items in this collection, contact anashydrology@gmail.com.
Publisher:
Arizona-Nevada Academy of Science
Journal:
Hydrology and Water Resources in Arizona and the Southwest
Abstract:
This paper examines the effects of random errors in the precision of latent energy estimates from the Bowen ratio model. The analysis identifies improvements in the instrumentation and in the field measurement techniques. Bowen ratio energy budget measurements were made over an extensive stand of mesquite (Prosopis pubescens) in the San Pedro River valley near Mammoth, Arizona. The error analysis indicated mean half -hour 95 percent confidence intervals for latent energy and sensible heat flux of 0.48 ± 0.09 and 0.21 ± 0.09 cal/cm²/min, respectively. A majority of the random error was associated with the temperature and humidity measurements used in the Bowen ratio model. Psychrometer circuitry and calibration procedures were modified to reduce measurement errors. Subsequent Bowen ratio measurements were made over a kochea (Kochea scoparia) pasture adjacent to the Pecos River near Roswell, New Mexico. The improvements were effective in reducing the mean half-hour 95 percent confidence intervals for latent energy and sensible heat flux to 0.27 ± 0.01 and 0.23 ± 0.01 cal/cm²/min, respectively.
Keywords:
Water resources development -- Arizona.; Hydrology -- Southwestern states.; Water resources development -- Southwestern states.
ISSN:
0272-6106

Full metadata record

DC FieldValue Language
dc.language.isoen_USen_US
dc.titleError Analysis of Evapotranspiration Measurementsen_US
dc.contributor.authorHartman, Robert K.en_US
dc.contributor.departmentUniversity of Arizonaen_US
dc.date.issued1980-04-12-
dc.rightsCopyright ©, where appropriate, is held by the author.en_US
dc.description.collectioninformationThis article is part of the Hydrology and Water Resources in Arizona and the Southwest collections. Digital access to this material is made possible by the Arizona-Nevada Academy of Science and the University of Arizona Libraries. For more information about items in this collection, contact anashydrology@gmail.com.en_US
dc.publisherArizona-Nevada Academy of Scienceen_US
dc.identifier.journalHydrology and Water Resources in Arizona and the Southwesten_US
dc.description.abstractThis paper examines the effects of random errors in the precision of latent energy estimates from the Bowen ratio model. The analysis identifies improvements in the instrumentation and in the field measurement techniques. Bowen ratio energy budget measurements were made over an extensive stand of mesquite (Prosopis pubescens) in the San Pedro River valley near Mammoth, Arizona. The error analysis indicated mean half -hour 95 percent confidence intervals for latent energy and sensible heat flux of 0.48 ± 0.09 and 0.21 ± 0.09 cal/cm²/min, respectively. A majority of the random error was associated with the temperature and humidity measurements used in the Bowen ratio model. Psychrometer circuitry and calibration procedures were modified to reduce measurement errors. Subsequent Bowen ratio measurements were made over a kochea (Kochea scoparia) pasture adjacent to the Pecos River near Roswell, New Mexico. The improvements were effective in reducing the mean half-hour 95 percent confidence intervals for latent energy and sensible heat flux to 0.27 ± 0.01 and 0.23 ± 0.01 cal/cm²/min, respectively.en_US
dc.subjectWater resources development -- Arizona.en_US
dc.subjectHydrology -- Southwestern states.en_US
dc.subjectWater resources development -- Southwestern states.en_US
dc.identifier.issn0272-6106-
dc.identifier.urihttp://hdl.handle.net/10150/301223-
dc.identifier.journalHydrology and Water Resources in Arizona and the Southwesten_US
dc.typetexten_US
dc.typeProceedingsen_US
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