气候变化领域集成服务门户(CCPortal): Assessing the impacts of irrigated agriculture on hydrological regimes in an oasis-desert system

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DOI	10.1016/j.jhydrol.2021.125976
	Assessing the impacts of irrigated agriculture on hydrological regimes in an oasis-desert system
	Yin, Xinwei; Feng, Qi; Zheng, Xinjun; Wu, Xue; Zhu, Meng; Sun, Fangqiang; Li, Yan
发表日期	2021
ISSN	0022-1694
EISSN	1879-2707
卷号	594
英文摘要	Irrigated agriculture greatly affects the hydrological systems and thereby eco-environment and food security in arid and semi-arid regions. However, a comprehensive assessment of the hydrological system dynamics in response to irrigated agriculture is still scarce, especially in oasis-desert systems of arid inland regions. Thus, we investigated the impact of irrigated agriculture on hydrological regimes in an oasis-desert system of northwest China. Temporal variations in water balance and lateral groundwater flow in oasis and desert experimental fields (i.e. oasis plot and desert plot) were quantified using the water balance analysis method. Soil water variations, groundwater dynamics and surface water and groundwater interactions in the oasis-desert system were determined by combining line transect survey methods and stable isotope (O-18, H-2) techniques using the USGS MODFLOW software. The results showed that water exchange fluxes and groundwater dynamics were altered by the application of water-saving irrigation techniques and the increase in total precipitation. In particular, the downward total exchanging flux above groundwater table and the outward total lateral groundwater flow reduced significantly in the oasis plot. Spatial heterogeneity and profile variability of soil moisture along the soil water content (SWC) transect significantly reduced. Simultaneously, the depth dependence of SWC in oasis cropland and the deep soil moisture at the edge of desert were improved under water-saving irrigation scenario. Temporal variations in groundwater table depths (GTDs) exhibited three different patterns (i.e. stable, metastable and fluctuating) and maintained a continuously downward trend except for the oasis-desert ecotone along the GTD transect, and an abrupt change was found to have occurred during 2006-2012, prompting changes in the seasonality of groundwater resource availability. Groundwater recharge and discharge processes changed dramatically due to large-scale land reclamation and groundwater pumping. Groundwater depletion is approaching hydrological limits although the process is largely compensated by precipitation and streamflow variability. Water-saving irrigation in conjunction with restriction of land reclamation and adaptation of water management practices is, at least for the present, the most effective way to maintain the coexistence of oasis and desert ecosystems in arid inland regions.
英文关键词	Oasis-desert system; Hydrological regimes; Irrigated agriculture; Sustainable water management
WOS研究方向	Engineering ; Geology ; Water Resources
WOS类目	Engineering, Civil ; Geosciences, Multidisciplinary ; Water Resources
WOS关键词	SOIL-WATER MOVEMENT ; TARIM RIVER-BASIN ; GROUNDWATER-RECHARGE ; HEIHE RIVER ; TEMPORAL STABILITY ; DEPTH PERSISTENCE ; TRANSITION ZONE ; SPATIAL-PATTERN ; EVAPOTRANSPIRATION ; MANAGEMENT
WOS记录号	WOS:000641589600077
来源期刊	JOURNAL OF HYDROLOGY
来源机构	中国科学院西北生态环境资源研究院
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/239443
作者单位	[Yin, Xinwei; Feng, Qi; Zhu, Meng] Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, Key Lab Ecohydrol Inland River Basin, Lanzhou 730000, Peoples R China; [Yin, Xinwei] Univ Chinese Acad Sci, Beijing 100049, Peoples R China; [Zheng, Xinjun] Chinese Acad Sci, Xinjiang Inst Ecol & Geog, State Key Lab Desert & Oasis Ecol, Urumqi 830011, Peoples R China; [Zheng, Xinjun] Chinese Acad Sci, Fukang Stn Desert Ecol, Fukang 831505, Xinjiang, Peoples R China; [Wu, Xue] Xinjiang Univ, Coll Resources & Environm Sci, Urumqi 830046, Peoples R China; [Sun, Fangqiang] China Geol Survey, Xian Ctr Geol Survey, Key Lab Groundwater & Ecol Arid & Semiarid Reg, Xian 710054, Peoples R China; [Li, Yan] Zhejiang A&F Univ, State Key Lab Subtrop Silviculture, Hangzhou 311300, Peoples R China
推荐引用方式 GB/T 7714	Yin, Xinwei,Feng, Qi,Zheng, Xinjun,et al. Assessing the impacts of irrigated agriculture on hydrological regimes in an oasis-desert system[J]. 中国科学院西北生态环境资源研究院,2021,594.
APA	Yin, Xinwei.,Feng, Qi.,Zheng, Xinjun.,Wu, Xue.,Zhu, Meng.,...&Li, Yan.(2021).Assessing the impacts of irrigated agriculture on hydrological regimes in an oasis-desert system.JOURNAL OF HYDROLOGY,594.
MLA	Yin, Xinwei,et al."Assessing the impacts of irrigated agriculture on hydrological regimes in an oasis-desert system".JOURNAL OF HYDROLOGY 594(2021).