International Journal of Agricultural Engineering

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Probability Distribution Functions of Weekly Reference Crop Evapotranspiration for Solapur District of Maharashtra


Affiliations
1 Department of Irrigation and Drainage Engineering, Mahatma Phule Krishi Vidyapeeth, Rahuri, Ahmednagar (M.S.), India
2 College of Technology and Engineering, Maharana Pratap University of Agriculture and Technology, Udaipur (Rajasthan), India
     

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The study was carried out to estimate a reference crop evapotranspiration (ETr) at different probability level for Solapur (North latitude 17°10" to 18°32" and East longitude 74°42" to 76°15") at 483.5 msl in the semi-arid zone of Maharashtra. Weekly reference evapotranspiration (ETr) values for the period (1977-2007) were computed by best method Penman-Monteith FAO-56. The probability distributions that were fitted to ETr values are log normal, Gumbel and Weibulls probability distribution functions. Chi-square test was perform to know the probability distribution of best fit. ETr values at 10 per cent to 90 per cent probability level for Penman-Monteith method using probability distribution of best fit.

Keywords

Evapotranspiration, Probability Distribution.
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  • Probability Distribution Functions of Weekly Reference Crop Evapotranspiration for Solapur District of Maharashtra

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Authors

A. D. Bhagat
Department of Irrigation and Drainage Engineering, Mahatma Phule Krishi Vidyapeeth, Rahuri, Ahmednagar (M.S.), India
M. A. Patil
College of Technology and Engineering, Maharana Pratap University of Agriculture and Technology, Udaipur (Rajasthan), India

Abstract


The study was carried out to estimate a reference crop evapotranspiration (ETr) at different probability level for Solapur (North latitude 17°10" to 18°32" and East longitude 74°42" to 76°15") at 483.5 msl in the semi-arid zone of Maharashtra. Weekly reference evapotranspiration (ETr) values for the period (1977-2007) were computed by best method Penman-Monteith FAO-56. The probability distributions that were fitted to ETr values are log normal, Gumbel and Weibulls probability distribution functions. Chi-square test was perform to know the probability distribution of best fit. ETr values at 10 per cent to 90 per cent probability level for Penman-Monteith method using probability distribution of best fit.

Keywords


Evapotranspiration, Probability Distribution.

References