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Sensitivity analysis of various reference evapotranspiration (ETo) models with FAO 56 Penman Monteith for semi-arid region of India

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Title Sensitivity analysis of various reference evapotranspiration (ETo) models with FAO 56 Penman Monteith for semi-arid region of India
Not Available
 
Creator Singandhupe, R.B. and Brahmanand, P.S
 
Subject ETo; GDD; MBE; RMSE; Red gram
 
Description Not Available
Daily crop ET of Triticum austivum L. and Cajanus cajan L. was monitored with gravimetric lysimeter during
1995-1997 at Rahuri, India (long. 780 18’ E and lat.190 45’ N) and was compared with various ETo models by
statistical indicators like RMSE, MBE, t-statistic for adoption in semi-arid region of India. The crop
evapotranspiration, on an average of three years was 1068.2 mm during crop growing season however, the reference
evapotranspiation (ETo) in case of Hargreaves model was 1864.3 mm, the open pan 1636.6 mm, radiation balance
2335.0 mm, FAO56 Penman Monteith 1597.5 mm, Blaney Criddle 2021.5 mm and Modified Penman 2508.3 mm.
The FAO56- PM model had lowest RMSE (2.89 mm day-1
) and MBE (1.05 mm day-1
) followed by Hargreaves
(RMSE 3.28 mm day-1
). The seasonal crop ET was 537.9 mm in red gram and 418.1 mm in wheat. The regression
analysis between crop coefficient (Kc) and ETo models were agreeable in Hargreaves and Modified Penman model
as evidenced by higher R2 values. Similarly regression analysis between crop coefficient and cumulative GDD had
significant response with R2 of 0.57 to 0.83 in wheat and R2 0.31 to 0.59 in red gram. The regression analysis between
SDD and crop coefficient had R2 0. 94 in red gram and 0.90 in wheat
Not Available
 
Date 2018-11-22T10:15:49Z
2018-11-22T10:15:49Z
2016-10
 
Type Research Paper
 
Identifier Singandhupe, R.B. and Brahmanand, P.S. 2016. Sensitivity analysis of various reference evapotranspiration (ETo) models with FAO 56 Penman Monteith for semi-arid region of India. International Journal of Current Science, 19(4):62-85.
2250-1770
http://krishi.icar.gov.in/jspui/handle/123456789/12807
 
Language English
 
Relation Not Available;
 
Publisher Current Science Association