干旱区研究2017，Vol.34Issue(4)：748-754,7.DOI:10.13866/j.azr.2017.04.05
鄂尔多斯高原潜水同位素特征及其成因分析
Isotope Characters of Shallow Groundwater and Their Formation in the Ordos Plateau
摘要
Abstract
Groundwater recharge in arid and semiarid areas in northwest China is still under debate currently.Hydrogen and oxygen stable isotopes in different water bodies showed that the mean values of δD and δ18O in shallow groundwater (-71.75‰,-9.64‰) were depleted more than the mean values of precipitation (-65.00‰,-8.79‰) in the Ordos Plateau.According to the combined analysis with local climate,groundwater recharge patterns and groundwater dynamic change of shallow groundwater level,it was considered that the depleted mean values of δD and δ18O in shallow groundwater were probably attributed to the effect of precipitation and soil water infiltration during the freezing-thawing periods of seasonal frozen soil in arid and semiarid areas.Groundwater recharge capacity in heavy rain was high,which possibly caused the depleted values of isotopes in shallow groundwater.The high recharge capacity of winter precipitation under soil freezing-thawing was another possible reason.The study revealed that the difference of groundwater recharge capacity caused by different conditions of precipitation and freezing-thawing of frozen soil must be taken into account when hydrogen and oxygen isotopes are used to study groundwater recharge.关键词
地下水/氢氧同位素/雨量效应/冻土冻融/鄂尔多斯高原Key words
groundwater/hydrogen and oxygen isotopes/rainfall effect/freezing-thawing process/frozen soil/Ordos Plateau引用本文复制引用
张俊,尹立河,马洪云,黄金廷,王晓勇..鄂尔多斯高原潜水同位素特征及其成因分析[J].干旱区研究,2017,34(4):748-754,7.基金项目
国家自然科学基金资助项目(41402226) （41402226）
中国地质调查局地调项目(20160293) （20160293）
国土资源公益性行业科研专项(201511047)资助 （201511047）
