摘要
诺木洪地区是柴达木盆地中发育较为典型的冲洪积扇,研究其地下水同位素特征及更新能力对于整个盆地地下水资源研究具有重要意义。分析了诺木洪地区地下水中的2H、3H、18O同位素特征,利用3H数据建立相应的数学物理模型,计算出冲洪积扇不同位置地下水的更新速率,并以此为依据定性划分了当地的地下水流动系统。山区至冲洪积扇中部地下水更新速率达5%/a^10%/a,更新能力较强。冲洪积扇前缘地下水更新速率为0.08%/a^1.4%/a,而在溢出带以下至盆地中心地下水更新速率小于0.07%/a,更新能力极弱。
As a typical alluvial fan, the isotopic characteristics and renewability of groundwater in the Nuomuhong alluvial fan are of important significance for regional groundwater resources studies in the Qaidam Basin. This paper analyzes the isotopic characteristics of2 H,18O and3 H in groundwater in the Nuomuhong allufial fan. The groundwater renewability at different places in the study era is calculated by establishing the corresponding3 H models and the local groundwater flow system is also divided qualitatively. The results show that from mountain areas to the middle part of the alluvial fan,groundwater has a strong renewability and the renewal rate ranges from 5 % / a to 10 % / a; in the leading edge of the alluvial fan,groundwater renewability rate ranges between 0. 08% / a and 1. 4% / a; from the overflow zone to the centre of the basin, the groundwater renewability is extremely poor（ the renewal rate is less than 0. 07% / a）,in which groundwater can be regarded as nonrenewable resources.
出处
《水文地质工程地质》
CAS
CSCD
北大核心
2015年第6期1-7,共7页
Hydrogeology & Engineering Geology
基金
中国地质调查局干旱-半干旱区地下水与生态重点实验室基金项目(1212011121277)
关键词
诺木洪冲洪积扇
地下水
同位素
更新速率
Nuomuhong alluvial-proluvial fan
groundwater
isotopes
renewable rate
