High-resolution study on the hydrochemical variations caused by the dilution of precipitation in the epikarst spring an example spring of Landiantang at Nongla, Mashan, China

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	High-resolution study on the hydrochemical variations caused by the dilution of precipitation in the epikarst spring an example spring of Landiantang at Nongla, Mashan, China
	Li, Q (Li, Qiang); Sun, HL (Sun, Hailong); Han, J (Han, Jun); Liu, ZH (Liu, Zaihua); Yu, LJ (Yu, Longjiang)
刊名	ENVIRONMENTAL GEOLOGY
	2008
卷号	54 期号:2 页码:347-354
关键词	epikarst zone auto data logging hydrochemical variation the dilution of precipitation Landiantang spring China
ISSN号	0943-0105
英文摘要	In addition to rainfall, high-resolution measurements of water level, pH, specific conductivity and temperature of Landiantang epikarst spring at Nongla, Mashan county in Guangxi Province, China were recorded in summer rainy season by using a data logger with time interval of fifteen minutes. Water from the spring issues along a karst conduit. During the rainstorms in summer, it was found that the pH and temperature of Landiantang spring increased while its specific conductivity decreased. As HCO3-, Ca2+ and Mg2+ are the dominant ions, linear relationships between concentrations of those ions and specific conductivity were developed. According to the ion concentrations from the linear relationships, the saturation indexes of calcite (SIC), the saturation indexes of dolomite (SID) and CO2 partial pressure (LogP(CO2)) of the spring were calculated. Results indicated that the LogP(CO2) of the spring during the rainstorms was lower than that without rain, and its SIC and SID was also lower. Combined with the characteristics of the epikarst zone, it was inferred that the above results were caused by the dilution of rainwater, because overland flow with high pH (due to neutralization of carbonate rock dusts in the air to rainwater) and low specific conductivity traveling through the conduit rapidly during rainstorms, showed greater influences on the hydrochemical variations of the epikarst spring.
学科主题	环境地质学
WOS关键词	CHEMICAL EVOLUTION ; NORTHERN FLORIDA ; SINKHOLE LAKE ; KARST ; GROUNDWATER ; TRANSPORT ; PATTERNS ; ORIGIN
WOS研究方向	Environmental Sciences & Ecology ; Geology ; Water Resources
语种	英语
出版者	SPRINGER
WOS记录号	WOS:000253213000013
内容类型	期刊论文
源URL	[http://119.78.100.197/handle/2HKVOGP0/38587]
专题	中国地质调查局
作者单位	Chinese Acad Sci, Inst Geochem, State Key Lab Environm Geochem, Guiyang 55002, Peoples R China
推荐引用方式 GB/T 7714	Li, Q ,Sun, HL ,Han, J ,et al. High-resolution study on the hydrochemical variations caused by the dilution of precipitation in the epikarst spring an example spring of Landiantang at Nongla, Mashan, China[J]. ENVIRONMENTAL GEOLOGY,2008,54(2):347-354.
APA	Li, Q ,Sun, HL ,Han, J ,Liu, ZH ,&Yu, LJ .(2008).High-resolution study on the hydrochemical variations caused by the dilution of precipitation in the epikarst spring an example spring of Landiantang at Nongla, Mashan, China.ENVIRONMENTAL GEOLOGY,54(2),347-354.
MLA	Li, Q ,et al."High-resolution study on the hydrochemical variations caused by the dilution of precipitation in the epikarst spring an example spring of Landiantang at Nongla, Mashan, China".ENVIRONMENTAL GEOLOGY 54.2(2008):347-354.