摘要
借助氢氧同位素和水化学方法对南太行山山前平原地下水补给运移规律进行研究,阐明人类活动对地下水的影响过程。研究结果表明:(1)区内不同水体δD、δ^(18)O、氘盈余值(d-excess)和氚同位素(T)值差异明显,深层地下水均值分别为-74.0‰、-9.4‰、1.5‰和8.73TU,浅层地下水均值分别为-72.1‰、-8.8‰、-1.9‰和17.46TU,河水均值分别为-71.3‰、-8.9‰、-0.4‰和18.60TU,工业废水均值分别为-68.3‰、-7.2‰、-10.7‰和21.11TU;(2)补给区深层地下水δD、δ^(18)O和d-excess年均值分别为-68.08‰、-9.24‰和5.84‰,径流区深层地下水δD、δ^(18)O和d-excess年均值分别为-62.30‰、-8.50‰和5.66‰,排泄区深层地下水δD、δ^(18)O和d-excess年均值分别为-75.14‰、-10.26‰和6.94‰;(3)深层地下水补给源包括大气降水和河水,受污染河水通过断层导水裂隙带补给深层地下水。浅层地下水补给源包括大气降水和河水,受污染河水通过河流侧渗方式补给浅层地下水;(4)受河水影响的深层地下水氘盈余值变低,T含量升高,因此结合氘盈余值与T含量可以很好地识别区内深层地下水污染过程。
On the basis of hydrogen and oxygen isotopes, recharge and flow mechanisms of groundwater in south piedmont plain of Taihang Mountain were studied, and influences of human activities on groundwater were elucidated. Results indicate that （1） Isotopic compositions of different water bodies are variable. The average values of δD, δ18O, d-excess and T are -74. 1‰,-9.5‰, 1.5‰ and 9.34 TU for deep groundwater, respectively, -72. 1‰, -8.8‰, - 1.9‰ and 17.46 TU for shallow groundwater, -69.3‰, -9.1‰, -0. 4‰ and 18.57 TU for surface water, and -68.6%v ,-7. 3‰,-10. 7‰ and 20. 18 TU for industrial waste water, respectively; （2） Annual values of δD, δ18O and d-excess of deep groundwater located in recharge area are -68.08‰,-9.24‰ and 5.84‰, respective- ly,- 62.30‰,-8.50‰ and 5.66‰ for groundwater in runoff area, and -75.14‰,-10. 26‰ and 6.94‰ for deep groundwater in dis- charge area, respectively. （3）Deep groundwater is recharged by local atmospheric precipitation and surface water, meanwhile polluted by surface water derived from sewage and industrial waste water through the fissure zone in the faults. Shallow groundwater is recharged by rainwater and river water, and polluted by filtration of sewage and industrial waste water; and （4）Deep groundwater with negative d-excess values and high T contents has been effected by sewage and waste water which not only have more negative d-excess values but have high T content. So d-excess values and T contents could be combined as good indicators for groundwater pollution processes re- search.
出处
《地球与环境》
CAS
CSCD
2016年第3期281-289,共9页
Earth and Environment
基金
国家自然科学基金项目(41103053和41173030)
河南省高校科技创新团队支持计划(15IRTSTHN027)
河南理工大学博士基金项目(B2012-092)
关键词
山前平原地下水
氢氧同位素
氚含量
人为活动
污染
groundwater
piedmont plain
hydrogen
oxygen
isotope
T content
human activity
pollution
