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| Titel |
Determining water use of sorghum from two-source energy balance and radiometric temperatures |
| VerfasserIn |
J. M. Sánchez, R. López-Urrea, E. Rubio, V. Caselles |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1027-5606
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| Digitales Dokument |
URL |
| Erschienen |
In: Hydrology and Earth System Sciences ; 15, no. 10 ; Nr. 15, no. 10 (2011-10-05), S.3061-3070 |
| Datensatznummer |
250012984
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| Publikation (Nr.) |
 copernicus.org/hess-15-3061-2011.pdf |
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| Zusammenfassung |
| Estimates of surface actual evapotranspiration (ET) can assist in predicting
crop water requirements. An alternative to the traditional crop-coefficient
methods are the energy balance models. The objective of this research was to
show how surface temperature observations can be used, together with a
two-source energy balance model, to determine crop water use throughout the
different phenological stages of a crop grown. Radiometric temperatures were
collected in a sorghum (Sorghum bicolor) field as part of an experimental campaign carried
out in Barrax, Spain, during the 2010 summer growing season. Performance of
the Simplified Two-Source Energy Balance (STSEB) model was evaluated by
comparison of estimated ET with values measured on a weighing lysimeter.
Errors of ±0.14 mm h−1 and ±1.0 mm d−1 were obtained at
hourly and daily scales, respectively. Total accumulated crop water use
during the campaign was underestimated by 5%. It is then shown that
thermal radiometry can provide precise crop water necessities and is a
promising tool for irrigation management. |
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