Determination of Water Consumption and Productivity of Wheat in Different Irrigation Systems in Behbahan

Document Type : Research Paper

Authors

1 Research Assistant Professor of Agricultural Engineering Research Department, Khuzestan Agricultural and Natural Resources Research and Education Center, Agricultural Research, Education and Extension Organization (AREEO), Ahvaz, Iran.

2 Research Assistant Professor, Agricultural Engineering Research Institute (AERI), Agricultural Research Education, and Extension Organization (AREEO), Karaj, Iran.

3 Professor of Irrigation and Drainage Engineering, Agricultural Engineering Research Institute (AERI), Agricultural Research Education and Extension Organization (AREEO), Karaj, Iran.

Abstract

Introduction
Precise estimation of the amount of water consumed, irrigation efficiency and water productivity of crops are the most important key indicators in agricultural sector planning of Iran. The figures given for the volume of water used in the agricultural sector are very different and there are serious doubts as to their accuracy. The average of water use efficiency in the country is 1.32 kg/m3 and its annual growth in the last 11 years has been reported to be 0.041 kg/m3 (Abbasi et al., 2017). Therefore, it is necessary to carry out an exploratory work that can be used to quantify the volume of water consumed by various products. Therefore, the main objective of this paper is to measure water consumption of wheat directly and to compare wheat water productivity in different irrigation systems under farmers management in Behbahan.
 
Methodology
The volume of application water for wheat in different farms during one season (2016-2017) was measured and compared. The measured values were compared with the crop water requirement estimated by the Penman-Monteith and the national document. To determine the volume of water consumed, firstly, the flow rate of the selected water sources was measured, with the appropriate devices (flumes, meter and micro molina). Farm information including cultivated area,  soil texture, soil electrical conductivity, electrical conductivity of the irrigation water used, and farm location with GPS were recorded. Other field information such as irrigation method, irrigation water sources (surface, underground), type of irrigation network (modern, traditional) were also recorded. Effective rainfall was calculated by the SCS method. Crop water requirement using the Penman-Monteith method was determined from data of current year and 10-year data for Behbahan city from the nearest meteorological station.

Keywords

Main Subjects

References

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Irrigation Sciences and Engineering
Volume 43, Issue 1
March 2020
Pages 29-42

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History

  • Receive Date: 23 September 2017
  • Revise Date: 11 December 2017
  • Accept Date: 17 December 2017
  • Publish Date: 20 March 2020

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