干旱区生态环境知识资源中心(Arid): Assessment of the climate change impacts on the watershed-scale optimal crop pattern using a surface-groundwater interaction hydro-agronomic model

Arid

DOI	10.1016/j.agwat.2022.107508
	Assessment of the climate change impacts on the watershed-scale optimal crop pattern using a surface-groundwater interaction hydro-agronomic model
	Akbari, Fatemeh; Shourian, Mojtaba; Moridi, Ali
通讯作者	Shourian, M
来源期刊	AGRICULTURAL WATER MANAGEMENT
ISSN	0378-3774
EISSN	1873-2283
出版年	2022
卷号	265
英文摘要	In arid regions, water resources are under immense pressure and multiple stresses. Excessive use of water resources without proper management occurs in the present situation, and it will be intensified under future climate change conditions. Finding a good strategy for water resources management is essential to preserve sustainability in such watersheds. In this study, the first purpose is to optimize water use for the agricultural crops in the Eshtehard watershed in Iran, where the aquifer is a strategic resource for irrigated agriculture and is facing intensive drawdown because of over-extraction. A hydro-agronomic simulation-optimization approach is used for agronomy and groundwater management in which the agricultural production and water level variation are simulated by linking SWAT and MODFLOW, and the optimal crops pattern is searched for by the PSO algorithm. The crops' area and their irrigation water consumption are the decision variables with the objective of maximizing the net benefit gained from the crops' yield while the groundwater drawdown is limited to a predefined stability level. For the following purpose, the climate change impact on the optimal crop pattern across the watershed under two representative concentration pathways scenarios (RCPs 2.6 and 8.5) downscaled by the data of the HadGEM2-ES General Circulation Model for the near future is evaluated. Results show that irreparable damage to groundwater depletion is reduced in the optimum state, and lower stress is imposed on the aquifer under the climate change impacts by executing the optimum crop pattern. To see this, a part of the winter wheat and cotton crops' area must be replaced by winter barley. Also, the crop's irrigation amount must be decreased for winter wheat, winter barley and cotton by 45%, 7%, and 10%, respectively, which reduces groundwater extraction in the optimum situation.
英文关键词	Watershed management Crop pattern planning Groundwater stability Climate change impact Hydro-agronomic modeling
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000792812000002
WOS关键词	SWAT ; QUALITY
WOS类目	Agronomy ; Water Resources
WOS研究方向	Agriculture ; Water Resources
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/391598
推荐引用方式 GB/T 7714	Akbari, Fatemeh,Shourian, Mojtaba,Moridi, Ali. Assessment of the climate change impacts on the watershed-scale optimal crop pattern using a surface-groundwater interaction hydro-agronomic model[J],2022,265.
APA	Akbari, Fatemeh,Shourian, Mojtaba,&Moridi, Ali.(2022).Assessment of the climate change impacts on the watershed-scale optimal crop pattern using a surface-groundwater interaction hydro-agronomic model.AGRICULTURAL WATER MANAGEMENT,265.
MLA	Akbari, Fatemeh,et al."Assessment of the climate change impacts on the watershed-scale optimal crop pattern using a surface-groundwater interaction hydro-agronomic model".AGRICULTURAL WATER MANAGEMENT 265(2022).