利用稳定同位素方法识别内蒙古佘太盆地地下水补给来源

发布时间：2018-06-03 22:46

本文选题：地下水 + 稳定同位素　；参考：《水文》2017年01期

【摘要】：为研究近几十年来佘太盆地地下水补给变化情况,通过现场调查分析,对佘太盆地浅层地下水开展同位素样品采集工作,并测定了其氢、氧稳定同位素的值。在分析同位素分布特征及变化规律的基础上,结合当地地质及水文地质条件识别了地下水补给来源和补给区并构建了浅层地下水的补给模式图,探讨了区域上浅层地下水的补给流动状况。通过分析研究区大气降水和地下水中的氢氧稳定同位素的变化特征发现:当地大气降水并不是地下水的主要补给来源,其补给源区为周边山区,补给来源主要是周边山区的大气降水,且地下水所经历的蒸发作用较明显;盆地的东、西部地下水的补给源区不尽相同,西部的补给区高程要高于东部的补给区高程,但两部分地下水所经历的蒸发强度基本相同。
[Abstract]:In order to study the variation of groundwater recharge in Shetai Basin in recent decades, isotopic sampling of shallow groundwater in Shesai Basin was carried out through field investigation and analysis, and the values of stable isotopes of hydrogen and oxygen were determined. On the basis of analyzing the characteristics of isotopic distribution and variation, combined with the local geological and hydrogeological conditions, the groundwater recharge source and recharge area were identified and the recharge model map of shallow groundwater was constructed. The recharge flow of shallow groundwater in the region is discussed. By analyzing the variation characteristics of hydrogen and oxygen stable isotopes in precipitation and groundwater in the study area, it is found that local precipitation is not the main source of groundwater recharge, and its recharge source is the surrounding mountain area. The source of recharge is mainly the precipitation in the surrounding mountainous area, and the evaporation of groundwater is obvious, the source of groundwater recharge in the east and west of the basin is different, and the height of the recharge area in the west is higher than that in the recharge area in the east. But the evaporation intensity of the two parts of groundwater is basically the same.
【作者单位】：中国地质科学院水文地质环境地质研究所;
【基金】：国家自然科学基金项目(41272252) 中国地质调查项目(1212011121141)
【分类号】：P641

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