International Journal of Advanced Biological and Biomedical Research

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Comparison of various sensitivity approaches to estimate evapotranspiration, to climatic variables in Fasa-synoptic station_Iran

Document Type : Original Article

Authors

Ayat Rohina 1
Mohammad Karami 2
Ayob Bahranifard 2
Mohsen Dehghan 2

1 Postgraduate in watershed management engineering, Payam Noor University part-time instructor, DehDasht branch, Kohkiloie Va Boirahmad, Iran

2 Postgraduate in watershed management engineering, Islamic azad university of Arsanjan branch, Arsanjan, Fars, Iran

Abstract
Sensitivity analysis to determine variations in evapotranspiration is much important considering a known variation in one of climatic variables. In this study, sensitivity of evapotranspiration from Penmann-Mantith, Penmann-Kimberly (1996), Penman-Kimberly (1972) and Penmann (1984)  and Hargrivs (1985) approaches to three climatic variations (maximum temperature, wind speed, solar radiation) was studied in station Fasa for an interval of 22 years (1982-2003). In this research, in order to represent the effect of climatic variables on evapotranspiration, variation percentage standard was used. The results showed that, in most approaches, the most sensitivity was to net radiation, maximum temperature and wind speed, respectively. The results of this study are applicable for measurement of climatic variations in order to estimate evapotranspiration.

Keywords

Potential evapotranspiration
Sensitivity analysis
Variation coefficient
Fasa synoptic station
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International Journal of Advanced Biological and Biomedical Research
Volume 1, Issue 4 - Serial Number 4
March and April 2013
Pages 459-466

  • Receive Date 24 July 2014

Article View 20,158
PDF Download 7,448

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