干旱区生态环境知识资源中心(Arid): Challenges and impacts of climate change and human activities on groundwater-dependent ecosystems in arid areas - A case study of the Nalenggele alluvial fan in NW China

Arid

DOI	10.1016/j.jhydrol.2019.03.082
	Challenges and impacts of climate change and human activities on groundwater-dependent ecosystems in arid areas - A case study of the Nalenggele alluvial fan in NW China
	Xu, Wei 1; Su, Xiaosi 2
通讯作者	Xu, Wei ; Su, Xiaosi
来源期刊	JOURNAL OF HYDROLOGY
ISSN	0022-1694
EISSN	1879-2707
出版年	2019
卷号	573 页码:376-385
英文摘要	Desert oases exist around the alluvial fans of inland river basins in arid areas, where the vegetation growth is wholly dependent on groundwater due to scanty rainfall and arid environment. Climate change and water resources exploitation may threaten the groundwater-dependent ecosystems (GDEs) in the arid areas; a case study was proposed to evaluate the vegetative growth state with the normalized difference vegetation index (NDVI), hydrometeorological data, and the exploitation of water resources of the Nalenggele alluvial fan in northwest China. Climate change, and increasing temperature and precipitation may be indispensable factors for vegetation growth; however, based on the results of a correlation analysis, it was found that climatic factors shared little direct correlation with the NDVIs of the Nalenggele alluvial fan. Also, the depth to groundwater table (DWT) and distribution of shallow groundwater (DSG) are the direct influencing factors of vegetation growth. DWT and DSG are mainly controlled by the groundwater recharge mechanism and the original water sources from snowmelt, which are directly correlated with climate change. Predictions for DWT and DSG were made considering water resource exploitation and different river discharges amid climate change. The results reveal that the distribution area of shallow groundwater with the ecological water level (DWT < 4 m) in 2020 will decrease to approximately 78-86% of that in the status quo year, which suggests vegetation may be at risk of degradation from the combined influence of climate change and human activities. Therefore, management strategy and legislation for protecting GDEs should be proactively initiated in other similar areas in China.
英文关键词	Climate change Water resources exploitation Arid area Alluvial fan Groundwater-dependent ecosystem Desert oasis Desert vegetation
类型	Article
语种	英语
国家	Peoples R China
收录类别	SCI-E
WOS记录号	WOS:000474327800029
WOS关键词	VEGETATION COVER ; RIVER-BASIN ; WATER ; EVAPOTRANSPIRATION ; RESPONSES ; PATTERNS ; DEPTH ; NDVI ; VARIABILITY ; MANAGEMENT
WOS类目	Engineering, Civil ; Geosciences, Multidisciplinary ; Water Resources
WOS研究方向	Engineering ; Geology ; Water Resources
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/217151
作者单位	1.Shenyang Agr Univ, Coll Water Conservancy, Shenyang 110866, Liaoning, Peoples R China; 2.Jilin Univ, Inst Water Resources & Environm, Changchun 130021, Jilin, Peoples R China
推荐引用方式 GB/T 7714	Xu, Wei,Su, Xiaosi. Challenges and impacts of climate change and human activities on groundwater-dependent ecosystems in arid areas - A case study of the Nalenggele alluvial fan in NW China[J],2019,573:376-385.
APA	Xu, Wei,&Su, Xiaosi.(2019).Challenges and impacts of climate change and human activities on groundwater-dependent ecosystems in arid areas - A case study of the Nalenggele alluvial fan in NW China.JOURNAL OF HYDROLOGY,573,376-385.
MLA	Xu, Wei,et al."Challenges and impacts of climate change and human activities on groundwater-dependent ecosystems in arid areas - A case study of the Nalenggele alluvial fan in NW China".JOURNAL OF HYDROLOGY 573(2019):376-385.