Water and Irrigation Management

Water and Irrigation Management

Risk assessment of climate change impacts on production and phenology of wheat (case study: Ahvaz Region)

Document Type : Research Paper

Authors
Mahdi Delghandi 1
Alireza Massah-Bovani 2
Mohammad Jafar Ajorlou 3
Saeed Broomandnasab 4
Bahram Andarzian 5
1 Assistant Professors, Department of Soil and Water, Agricultural Facualty, Shahrood University, Shahrood, Iran
2 Associate Professors, Department of Science and Water Engineering, Tehran University, Tehran, Iran
3 Assistant Professors, Department of Military Geography Department, Imam Hossein, Tehran, Iran
4 Professors, Water Sciences Engineering Facualty, Shahid Chamran University, Ahwaz, Iran
5 Assistant Professor, Khuzestan Agriculture and Natural Resources Research Center (KANRC), Ahwaz, Iran
10.22059/jwim.2014.53032
Abstract
In recent years, human activities has resulted increases in atmospheric carbon dioxide (CO2) concentration. Increase in [CO2] has caused global warming and Climate change. The aim of this study was to assess potential climate change impact on production for one of the most important varieties of wheat (chamran) in Ahvaz Region. For this purpose, thirteen AOGCM models and two greenhouse gases emission (GHG) scenarios (A2 and B1) was selected. Daily temperature and precipitation data were calculated for two future periods (2015-2045 and 2070-2099) under five probability levels (0.10, 0.25, 0.50, 0.75 and 0.90). The combination of temperature and precipitation scenarios resulted in 50 climate change scenarios under each GHG emissions scenario (A2 and B1). Wheat growth was simulated for the baseline period (1980-2010) and future periods (2015-2045 and 2070-2100) using calibrated and validated CERES-Wheat model. Results showed the length of growing season is shortened as a result of climate change affects, especially in the 2070-2100 periods. Comparing of Wheat yield in climate change conditions with base period, showed that wheat yield in 2015-2045 and 2070-2100 is decreased about 4 and 15 percent, respectively.
Keywords
CO2
CERES-wheat model
Emission scenarios
Wheat Yield
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Water and Irrigation Management
Volume 4, Issue 2 - Serial Number 2
Autumn 2015
Pages 161-175