干旱区生态环境知识资源中心(Arid): Simulating drip irrigation in large-scale and high-resolution ecohydrological models: From emitters to the basin

Arid

DOI	10.1016/j.agwat.2023.108500
	Simulating drip irrigation in large-scale and high-resolution ecohydrological models: From emitters to the basin
	Han, Feng; Zheng, Yi; Zhang, Ling; Xiong, Rui; Hu, Zhaoping; Tian, Yong; Li, Xin
通讯作者	Zheng, Y
来源期刊	AGRICULTURAL WATER MANAGEMENT
ISSN	0378-3774
EISSN	1873-2283
出版年	2023
卷号	289
英文摘要	Drip irrigation is deemed as a solution to the water conflict between agricultural and ecological needs in arid regions, but assessing hydrological impacts of drip irrigation remains challenging. This study developed a new approach to simulating drip irrigation at a basin scale, with the configuration of irrigation system explicitly represented and the emitter-scale wetted soil volume directly modeled, and incorporated the approach into HEIFLOW, a fully distributed and physically based ecohydrological model. The improved model, named HEIFLOW-drip, was used to study the potential implementation of drip irrigation in the Zhangye basin in Northwest China. Due to the recycling effect of irrigation return flow, the basin-scale water-saving efficiency (WSE) of drip irrigation fully implemented in the irrigated farmlands is 16.8%, less than half of its field-scale WSE (36.5%). This discrepancy indicates that accounting the water saved in fields may lead to notable over-estimation of the basin-wide water saving by drip irrigation in basins with strong surface water-groundwater interactions. If fully implemented, drip irrigation would significantly alter the regional water balance, increasing the stream outflow by approximately 30%, while causing a decline in groundwater level. This tradeoff can be alleviated by tuning the management parameters of drip irrigation, which can achieve a synergistic effect of increasing the streamflow while preventing dramatic groundwater depletion. Another effective strategy is to implement drip irrigation in part of the basin. Given the intricate impacts of drip irrigation on hydrological processes, the determination of the scale and location of drip irrigation should be thought through at the basin level. Further analyses indicate the importance of proper management of the water saved by drip irrigation, which is crucial to prevent the paradox of irrigation efficiency. The findings of this study have great implications for addressing the complex water-food-ecosystem nexus in arid endorheic river basins.
英文关键词	Drip irrigation Endorheic river Arid region Ecohydrological modeling Groundwater HEIFLOW
类型	Article
语种	英语
开放获取类型	hybrid
收录类别	SCI-E
WOS记录号	WOS:001075063100001
WOS关键词	WETTED SOIL VOLUME ; SEMIARID REGIONS ; WATER ; MANAGEMENT ; EFFICIENCY ; IMPACTS ; FLUXES
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/2XILL650/395099
推荐引用方式 GB/T 7714	Han, Feng,Zheng, Yi,Zhang, Ling,et al. Simulating drip irrigation in large-scale and high-resolution ecohydrological models: From emitters to the basin[J],2023,289.
APA	Han, Feng.,Zheng, Yi.,Zhang, Ling.,Xiong, Rui.,Hu, Zhaoping.,...&Li, Xin.(2023).Simulating drip irrigation in large-scale and high-resolution ecohydrological models: From emitters to the basin.AGRICULTURAL WATER MANAGEMENT,289.
MLA	Han, Feng,et al."Simulating drip irrigation in large-scale and high-resolution ecohydrological models: From emitters to the basin".AGRICULTURAL WATER MANAGEMENT 289(2023).