新疆鄯善县水环境氢氧同位素特征及其指示作用

根据鄯善县氢氧稳定同位素资料及氘盈余（d）值,分析了地表与地下水体的δD、δ18O和d值的分布规律,并得到地下水的主要补给来源及其与地表水的相互作用关系;地下水的δD在-87.88‰～-65.97‰间,δ18O在-9.4‰～-12.37‰间;地表水的δ18O在-10.08‰～-13.63‰间,d在14.12‰～32.19‰间。结果表明：鄯善县地下水和地表水同源于大气降水,且经历了较强的蒸发作用;地下水与地表水之间的水力联系较弱,深层地下水主要接受河水在洪积扇区的入渗补给,浅层地下水主要接受河流引水灌溉入渗;不同深度地下水之间的水力联系较为密切,为统一的地下水系统。

Feature of hydrogen and oxygen isotopes of water environment and their indication in Shanshan county of Xinjiang

Based on the data of hydrogen and oxygen isotope and deuterium excess（ d） in water in ShanShan,this paper analyzed the distribution rule of δD、δ18O and d in different water,got the relation between the main make-up source of groundwater and surface water which indicate that in groundwater δD varies from- 87. 88‰ to- 65. 97‰ and δ18O from- 9. 4‰ to- 12. 37‰,while in surface water d is from 14. 12‰ to ～ 32. 19‰ and δ18O is from- 10. 08‰ to- 13. 63. The results indicate that both groundwater and stream water are derived from the rainfall and experience the stronger role of evaporation; the hydraulic relation of groundwater and surface water is weaker,the groundwater in deep aquifer is mainly recharged by the intensive infiltration of stream water in the proluvial fan,and the groundwater in shallow aquifer mainly receive irrigation infiltration from river in plain area. the hydraulic connection of different deep groundwater is closer,which is a unified groundwater system.