Tracing of Recharge Sources of Deep Aquifers in the Concealed Type Colliery of North China by Hydrochemistry and Isotopes
详细信息
- 责任者：Chen Luwang (School of Resources and Environmental Engineering ; Hefei University of Technology ; Hefei 230009 ; China) ; Yin Xiaoxi
- 刊名：Scientia Geographica Sinica
- 出版年：2013
- 卷期：33(6)
- 关键词：水化学 ; hydrochemistry ; 深层水 ; deep-seated water ; 同位素示踪法 ; isotopic tracer methods ; 华北地区 ; North China
- 页码：p.755-762
- 图表：illus., 20 refs.
- 分类号：1701
- issnNo：ISSN1000-0690
- isbnNo：CN22-1124/P
摘要
In order to find out the recharge condition in deep aquifers in the concealed type colliery in the north of China,taking Renlou colliery and the local Linhuan coal-mining district for example,hydrochemical systemic cluster analysis and hydrogen and oxygen isotopes tracing were carried out to discuss and analyze the recharge sources and its changing mechanism in the deep aquifers under the influence of mining activities.The deep groundwater of the coal-mining district was composed of direct but nonuniform infiltration and retention infiltration of precipitation and ancient underground water.In the case of TDS of deep groundwater at less than 1 000 mg/L,the δ values of stable hydrogen(D) and oxygen isotopes(18O) decreased with the increase of TDS in the coal-mining district.However,in the case of TDS of deep groundwater at higher than 1 000 mg/L,the δ values were around the average ones.In addition,the average δ values of D and 18O were-67.4‰ and-8.68‰ respectively,being relatively small compared with that of precipitation in the coal-mining district.Without the influence of mining activities,the deep groundwater of the coal-mining district was formed by the direct but nonuniform infiltration of precipitation.However,under the influence of mining activities,the deep groundwater of the coal-mining district was formed by the retention infiltration of precipitation,because mining activities had broken the original circulation condition of deep groundwater and the hydraulic alternate had been accelerated in the recharge area.