Iranian Journal of Irrigation & Drainage

Iranian Journal of Irrigation & Drainage

Spatial evaluation of yield and rainwater productivity index in rainfed wheat using AquaCrop-GIS model (case study: Kurdistan province)

Document Type : Original Article

Authors
Ghazale Ziaii 1
Hossein Babazadeh 2
Niazali Ebrahimipak 3
Arash Tafteh 4
Kamran Eftekhari 5
1 Department of Water Science and Engineering, Science and Research Branch, Islamic Azad University
2 Department of Water Science and Engineering, Science and Research Branch, Tehran, Iran
3 Associate Professor of Irrigation and Soil Physics, Soil and Water Research Institute, Agricultural Research and Education Organization, Karaj, Iran
4 Irrigation and soil physics research department, SWRI
5 Assistant professor, Department of irrigation and soil physics, Soil and Water Research Institute, Agricultural Research, Education and Extension Organization (AREEO), Karaj, Iran.
Abstract
Wheat, as one of the most important crops in Iran and all around the world, has taken a significant share of the area under cultivation and production. The lack of water resources in the dry climate of Iran makes it necessary to use the available water resources to the optimal level. The analysis of optimal water consumption in agricultural production is done by using the water efficiency index. In this study, rainwater productivity in rainfed wheat cultivation in Kurdistan province was estimated using the AquaCrop-GIS model. Performance information was collected from the Agricultural Products Insurance Fund in the six-year period from 2014-2015 to 2019-2020. Also, information from synoptic meteorological stations and the global soil data bank were used for the required basic information. The model results show a 90% agreement index in the simulation process. Also, according to the average water productivity index calculated by the model, a zoning map of the areas prone to rainfed wheat cultivation was presented. Kamyaran district, having an average water productivity index of 0.68 kg/m3, was identified as the most suitable part of the province for dry wheat cultivation. According to the special conditions of Kurdistan province, it is suggested that the development of the cultivated area should be done according to the priority of more susceptible areas and based on the rainwater productivity index in the province.
Keywords
AquaCrop-GIS
Kurdistan
Rainfed cultivation
Water Productivity
Wheat
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Iranian Journal of Irrigation & Drainage
Volume 17, Issue 3 - Serial Number 99
July and August 2023
Pages 465-477