Temporal Variability of Groundwater Chemistry and Relationship with Water-table Fluctuation in the Jianghan Plain, Central China
Temporal Variability of Groundwater Chemistry and Relationship with Water-table Fluctuation in the Jianghan Plain, Central China
复制标题
华中江汉平原地下水化学随时间变化及其与地下水位升降的关系
DOI:
10.1016/j.proeps.2014.08.018
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发表时间:
2014
期刊:
影响因子:
--
通讯作者:
Yiqun Gan
中科院分区:
文献类型:
--
作者:
Yamin Deng;Huijuan Li;Yanxin Wang;Yanhua Duan;Yiqun Gan
Samples were collected every month from 39 monitoring wells over a period of 1 year and three months (from Jan 2013 to Mar 2014) in the Jianghan alluvial plain in the middle reaches of the Yangtze river, central China, to evaluate the temporal variability of groundwater composition for As and other constituents. The concentrations of K,Na,Ca,Mg in groundwater generally varied less than 30%, whereas concentrations of the redox-sensitive components (Fe,NH4-N,S and As) varied greater over time. In wells tapping the confined aquifers with depth of 25m, concentrations of groundwater As were much higher and ranged up to760 ±320 μg/L seasonally. Higher As concentration were associated with an increasing percentage of As(III) in rainy season and a decrease towards the end of dry season, indicating a reductive mobilization responding to groundwater level fluctuation.
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