Impact of water diversion on the hydrogeochemical characterization of surface water and groundwater in the Yellow River Delta

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	Impact of water diversion on the hydrogeochemical characterization of surface water and groundwater in the Yellow River Delta
	Zhang Yan; Li Jing; Li Fadong
	2014
关键词	Recharging (underground waters) Aquifers Ecosystems Farms Flood control Groundwater resources Hydrochemistry Hydrogeology Isotopes Lithology River pollution Surface waters Trapped ions Wetlands
英文摘要	The Yellow River diversion project, in operation since 2008, aims to mitigate a projected ecosystem disaster. We conducted field investigations across three ecosystems (Farmland, Wetland and Coast) in the delta to assess the effectiveness of the annual water pulse and determine the relationships between surface water and groundwater. The chemical characteristics of the groundwater in Farmland exclude the possibility of seawater intrusion. The Wetland is vulnerable to pollution by groundwater discharge from Farmland and to secondary salinization caused by rising water tables. The salinity values of groundwater at Coast sites likely reflect the presence of seawater trapped in the clay sediments, a premise corroborated through measurements of groundwater levels, stable isotopes and major ion signatures. Our D-18O two-dimensional graphic plot demonstrated that groundwaters of Farmland and Wetland changed toward more depleted isotopic compositions following water diversion, but this was not the case in the Coast sites, where the water table varied little year-round. A hydrochemical facies evolution diagram (HFE-D) demonstrated that freshening is taking place in the largest portions of the aquifers and that, without sustained water diversion recharge, these underground water bodies may switch from freshening to salinization on a seasonal time scale. Thus, the qualities of waters in coastal aquifers in the Yellow River Delta are substantially influenced by the process of ecological water diversion, and also by land use practices and by the lithological properties of the drainage landscape. 2014 Elsevier Ltd.
出处	Applied Geochemistry
卷	48 页:83-92
收录类别	EI
语种	英语
内容类型	EI期刊论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/31320]
专题	地理科学与资源研究所_历年回溯文献
推荐引用方式 GB/T 7714	Zhang Yan,Li Jing,Li Fadong. Impact of water diversion on the hydrogeochemical characterization of surface water and groundwater in the Yellow River Delta. 2014.