Subscribe Now Subscribe Today
Science Alert
 
Blue
   
Curve Top
Journal of Applied Sciences
  Year: 2007 | Volume: 7 | Issue: 6 | Page No.: 936-941
DOI: 10.3923/jas.2007.936.941
 
Facebook Twitter Digg Reddit Linkedin StumbleUpon E-mail

Developing Pan Evaporation to Grass Reference Evapotranspiration Conversion Model a Case Study in Khuzestan Province

Ali Rahimi Khoob, Seyedmahmoudreza Behbahani and Mohammad Hadi Nazarifar

Abstract:
In the present study, pan evaporation data and the data required for estimating reference evapotranspiration were collected from 10 meteorological stations in Khuzestan Province using the Penman-Monteith method. Three first, second and third order polynomial models were studied for conversion of pan evaporation data to grass reference evapotranspiration with pan evaporation, wind speed and air humidity as the main variables. The results obtained from the Penman-Monteith method were used as the basis for conversion. The results showed that the second and third order polynomials enjoyed higher and equal accuracy levels. Thus, the second order polynomial was recommended for use under the conditions of Khuzestan Province as it required fewer input variables. The determination coefficient for this model was found to be 0.93, its root mean square error was 0.9 mm day-1 and its correlation slope was 0.98.
PDF Fulltext XML References Citation Report Citation
How to cite this article:

Ali Rahimi Khoob, Seyedmahmoudreza Behbahani and Mohammad Hadi Nazarifar , 2007. Developing Pan Evaporation to Grass Reference Evapotranspiration Conversion Model a Case Study in Khuzestan Province. Journal of Applied Sciences, 7: 936-941.

DOI: 10.3923/jas.2007.936.941

URL: https://scialert.net/abstract/?doi=jas.2007.936.941

COMMENTS
31 January, 2012
khaled taher benabdalla:
Assessment of the Weather Data Generators and their Use for
Estimating Reference Evapotranspiration and Water Requirements
Literaure review
1. Weather data generation
2. Evapotranspiration concepts
3.Evapotranspiration Methodogies4.Crop water requirements
5. Irrigation scheduling using Evapotranspiration
COMMENT ON THIS PAPER
 
 
 

 

 
 
 
 
 
 
 
 
 

 
 
 
 
 
 
 

Curve Bottom