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| Web URL(s): | http://www.sciencedirect.com/science/article/pii/S0378377403000945
Last checked: 05/30/2013
Access conditions: Item is within a limited-access website |
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| Publication Type:
| Refereed |
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| Author(s): | DehghaniSanij, Hossein;
Yamamoto, Tahei;
Rasiah, Velu |
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| Author Affiliation: | DehghaniSanij and Yamamoto: Tottori University, Arid Land Research Center, Tottori, Japan; and Rasiah: Department of Natural Resources and Mines, Mareeba, Australia |
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| Title: | Assessment of evapotranspiration estimation models for use in semi-arid environments |
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| Source: | Agricultural Water Management. Vol. 64, No. 2, January 15 2004, p. 91-106. |
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| Publishing Information: | [Amsterdam]: Elsevier Scientific Pub. |
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| # of Pages: | 16 |
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| Keywords: | TIC Keywords: Evapotranspiration; Weather data; Irrigation program; semiarid climates; Humid climate; Microirrigation; Estimation; Models; Lysimeters
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| Geographic Terms: | Karaj, Iran; Tottori, Iran |
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| Abstract/Contents: | "Limited information exists on reliable estimates of evapotranspiration (ETo), to be used as forecasts, to achieve high irrigation water use efficiency in semi-arid environment, particularly under microirrigation (MI) system. The objectives of this study were to: (i) assess the estimates of ETo obtained using six models against experimentally determined values in a semi-arid environment, Karaj in Iran; (ii) assess the usefulness of short-term weather data in the computation of ETo estimates for forecasting purposes; and (iii) compare ETo computed for a semi-arid environment with that of a humid temperate environment, Tottori in Japan. In-field lysimeter experiments were conducted in 1993 and 1994 in Karaj to compute daily ETo from water-balance data and a similar experiment was conducted in 1972 and 1973 in Tottori. The ETo estimates were obtained using the Penman (PE), Penman-Monteith (PM), Wright-Penman (WP), Blaney-Criddle (BC), Radiation balance (RB) and Hargreaves (HG) models. The ETo forecasts for Karaj and Tottori were obtained using 5- or 8-year weather data and 1- and 2-year return period approach. Compared with the lysimeter values, over- and underestimations of ETo estimates as assessed by root mean square, mean bias error and t-test statistics for the semi-arid Karaj, whereas the PE model performed best for the temperate Tottori. In general, the ETo forecasts obtained using 8-year weather data were better than 5-year weather data. The 2-year return period ETo forecasts were better than 1-year return period, regardless of the duration of weather data duration. The results show that: (i) PM model to produced best ETo estimates for semi-arid environment whereas the PE model produced the best ETo estimates for humid temperate environment; and (ii) 8-year weather data and 2-year return period approach produced most reliable ETo estimates for forecastng purposes." |
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| Language: | English |
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| References: | 19 |
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| Note: | Tables
Graphs |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
DehghaniSanij, H., T. Yamamoto, and V. Rasiah. 2004. Assessment of evapotranspiration estimation models for use in semi-arid environments. Agric. Water Manage. 64(2):p. 91-106. |
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| Web URL(s):
http://www.sciencedirect.com/science/article/pii/S0378377403000945
Last checked: 05/30/2013
Access conditions: Item is within a limited-access website |
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MSU catalog number: S 494.5 W3 A34 |
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