干旱区生态环境知识资源中心(Arid): DSSAT-MODFLOW: A new modeling framework for exploring groundwater conservation strategies in irrigated areas

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DOI	10.1016/j.agwat.2020.106033
	DSSAT-MODFLOW: A new modeling framework for exploring groundwater conservation strategies in irrigated areas
	Xiang, Zaichen 1; Bailey, Ryan T.1; Nozari, Soheil 1; Husain, Zainab 2; Kisekka, Isaya 2; Sharda, Vaishali 3; Gowda, Prasanna 4
通讯作者	Xiang, Zaichen
来源期刊	AGRICULTURAL WATER MANAGEMENT
ISSN	0378-3774
EISSN	1873-2283
出版年	2020
卷号	232
英文摘要	Groundwater models are often used to assess the impact of climate or management strategies on groundwater resources in arid and semiarid regions of the world. However, these models do not account for crop growth and crop yield, and thus cannot be used for evaluating long-term impacts of climate and management strategies on water use efficiency and farm profitability of agricultural systems while managing the aquifers sustainably. This study presented a linkage between DSSAT, an agronomic model, and MODFLOW, a groundwater flow model. The linkage between these two models occurred on an annual basis, with rates of irrigation and deep percolation from an ensemble of field-scale DSSAT simulations converted to pumping rates and recharge rates for the MODFLOW simulation. MODFLOW simulated groundwater head, which can be used to update saturated thickness and thereby well capacities for each pumping well in the model domain. Simulated well capacities were then used to constrain irrigation applications in the DSSAT simulations during the following growing season. Python scripts were used to convert output from one model to input files for the other model. The DSSAT-MODFLOW modeling system was applied to the Ogallala aquifer underlying Finney County, Kansas, a region experiencing significant groundwater depletion due to irrigation practices, and was tested against observed water table elevation and crop yield. Over a decadal period, well capacity decreased by >50 % for many pumping wells in the county. A no-irrigation scenario for this same time period resulted in average water table elevation increasing by 2 m, but also a 70 % decline in crop yield. Additional work is needed to balance groundwater conservation with crop yield. The DSSAT-MODFLOW modeling system can be used in regions worldwide to assess changes in irrigation technologies, crop selection, and climate change adaptation strategies.
英文关键词	Groundwater modeling DSSAT MODFLOW Irrigation Integrated modeling
类型	Article
语种	英语
国家	USA
收录类别	SCI-E
WOS记录号	WOS:000525288400007
WOS关键词	MANAGEMENT ; DEPLETION ; INTEGRATION ; SIMULATION ; PIEDMONT ; SYSTEMS ; REGION
WOS类目	Agronomy ; Water Resources
WOS研究方向	Agriculture ; Water Resources
来源机构	University of California, Davis ; Colorado State University
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/313958
作者单位	1.Colorado State Univ, Dept Civil & Environm Engn, Ft Collins, CO 80523 USA; 2.Univ Calif Davis, Dept Land Air & Water Resources Biol & Agr Engn, Davis, CA 95616 USA; 3.Kansas State Univ, Dept Biol & Agr Engn, Manhattan, KS 66506 USA; 4.USDA ARS, Grazinglands Res Lab, El Reno, OK 73036 USA
推荐引用方式 GB/T 7714	Xiang, Zaichen,Bailey, Ryan T.,Nozari, Soheil,et al. DSSAT-MODFLOW: A new modeling framework for exploring groundwater conservation strategies in irrigated areas[J]. University of California, Davis, Colorado State University,2020,232.
APA	Xiang, Zaichen.,Bailey, Ryan T..,Nozari, Soheil.,Husain, Zainab.,Kisekka, Isaya.,...&Gowda, Prasanna.(2020).DSSAT-MODFLOW: A new modeling framework for exploring groundwater conservation strategies in irrigated areas.AGRICULTURAL WATER MANAGEMENT,232.
MLA	Xiang, Zaichen,et al."DSSAT-MODFLOW: A new modeling framework for exploring groundwater conservation strategies in irrigated areas".AGRICULTURAL WATER MANAGEMENT 232(2020).