EVALUATION AND CALIBRATION OF THREE EVAPOTRANSPIRATION EQUATIONS IN A SEMI-ARID REGION

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FOULADMAND H.R.; SEPASKHAH ALI REZA

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Journal: IRAN-WATER RESOURCES RESEARCH Year:2005 | Volume:1 | Issue:2 Page(s): 1-6

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Information Journal Paper

Title

EVALUATION AND CALIBRATION OF THREE EVAPOTRANSPIRATION EQUATIONS IN A SEMI-ARID REGION

Author(s)

FOULADMAND H.R. | SEPASKHAH ALI REZA | Issue Writer Certificate

Keywords

REFERENCE CROPQ4

POTENTIAL EVAPOTRANSPIRATIONQ4

PENMAN-FAOQ4

PENMAN-MONTEITHQ4

HARGREAVESQ3

Abstract

This paper evaluates three different methods for estimation of REFERENCE CROP evapotranspiration (ET0) in Bajgah area, Fars province, in Iran. Monthly values of ET0 were estimated with PENMAN-FAO, PENMAN-MONTEITH and HARGREAVES equations using the mean monthly weather data from 1986-2002 (17 years). The PENMAN-MONTEITH and HARGREAVES equations were calibrated based on PENMAN-FAO method which was recognized as the most appropriate equation for ET0 estimation, according to the previous studies. This study showed that the results of PENMAN-MONTEITH and HARGREAVES equations are similar to but somehow they underestimate ET0 compared with PENMAN-FAO method. To calibrate the PENMAN-MONTEITH and HARGREAVES equations, a linear regression was used. The results of calibration for Penman- Monteith equation showed the variation of the slope of the line and ET0 the calibration coefficient (CH) of the HARGREAVES equation for each month annual ET0 estimated.

Cites

ESTIMATION OF THE REFERENCE CROP EVAPOTRANSPIRATION USING FUZZY LOGIC AND ARTIFICIAL NEURAL NETWORK

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APA: Copy

FOULADMAND, H.R., & SEPASKHAH, ALI REZA. (2005). EVALUATION AND CALIBRATION OF THREE EVAPOTRANSPIRATION EQUATIONS IN A SEMI-ARID REGION. IRAN-WATER RESOURCES RESEARCH, 1(2), 1-6. SID. https://sid.ir/paper/100130/en

Vancouver: Copy

FOULADMAND H.R., SEPASKHAH ALI REZA. EVALUATION AND CALIBRATION OF THREE EVAPOTRANSPIRATION EQUATIONS IN A SEMI-ARID REGION. IRAN-WATER RESOURCES RESEARCH[Internet]. 2005;1(2):1-6. Available from: https://sid.ir/paper/100130/en

IEEE: Copy

H.R. FOULADMAND, and ALI REZA SEPASKHAH, “EVALUATION AND CALIBRATION OF THREE EVAPOTRANSPIRATION EQUATIONS IN A SEMI-ARID REGION,” IRAN-WATER RESOURCES RESEARCH, vol. 1, no. 2, pp. 1–6, 2005, [Online]. Available: https://sid.ir/paper/100130/en

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