摘要
巴丹吉林沙漠东南部湖泊群是该沙漠重要的水源之一,为揭示湖泊群水体潜在补给来源和补给方式,探索湖泊水体离子空间变化特征及其影响因素,系统分析了该沙漠东南部湖泊群水体δ^(18) O和δD同位素特征及水化学组成。结果表明:①巴丹吉林沙漠湖泊群水体pH和电导率平均值分别为9.29,291 mS/cm,以Na^(+)和Cl^(-)离子为主,占离子总量比例达69.4%。②湖泊群水体δ^(18) O和δD同位素平均值分别为6.42‰和-3.67‰,不同区域湖泊群蒸发效应差异显著,湖泊蒸发强度自东南部至西北部逐步增大。③基于同位素高程效应方程,研究区湖泊水体潜在补给来源为东南部雅布赖山大气降水,补给方式主要以周边地下水侧向补给为主。补给水源和区域岩石风化是研究区湖泊群水体离子空间变化的主控因素。
The lakes,located in the southeast of the Badain Jaran Desert,are one of most significant water resources in this desert.In order to reveal the potential recharge sources and recharge modes of lakes and explore the spatial variation characteristics of chemical ions and influence factors on lake water,the stable isotopic(δ^(18) O andδD)characteristics and hydrochemical features of lake water in the Badain Jaran Desert had been systematically analyzed.The results were as follows:the average values of pH and Ec for lake water were 9.29 and 291 mS/cm respectively,and the main ions of lake water were Na^(+) and Cl^(-),accounting for 69.4%of total ions.The average values of δ^(18) O and δD for lake water were 6.42‰and-3.67‰respectively.The evaporation effects on lakes in different regions varied significantly,and the evaporation intensity of lakes gradually increased from the southeastern to the northwestern of this desert.Based on the isotope-elevation relationship equation,the potential recharge source of lakes was the atmospheric precipitation from the Yabulai Mountains located in the southeast of this desert,and the recharge mode of lakes was mainly the lateral recharge from the surrounding groundwater.The recharge sources and regional rock weathering were the main controlling factors for the spatial variation of lake water ions in this desert.
作者
金可
张乾柱
卢阳
胡月
饶文波
JIN Ke;ZHANG Qianzhu;LU Yang;HU Yue;RAO Wenbo(Chongqing Branch,Changjiang River Scientific Research Institute,Chongqing 400026,China;College of Earth Sciences and Engineering,Hohai University,Nanjing 211100,China)
出处
《人民长江》
北大核心
2022年第4期65-72,共8页
Yangtze River
基金
国家自然科学基金项目(41273025)
中央级公益性科研院所基本科研业务费项目(CKSF2019413/CQ,CKSF2021464/CQ)。
关键词
湖泊群
氢氧同位素
水化学特征
补给来源
影响因素
巴丹吉林沙漠
lake groups
hydrogen and oxygen isotopes
hydrochemical features
recharge sources
influence factors
Badain Jaran Desert
