Inter-basin groundwater flow in the Ordos Basin:Evidence of environmental isotope and hydrological investigations  

作　　者：Yitong Zhang Jiaqi Chen Jiansheng Chen Wang Wang 

机构地区：[1]Geotechnical Research Institute,College of Civil and Transportation,Hohai University,Nanjing 210098,China [2]College of Information Science and Engineering,Hohai University,Nanjing 210098,China [3]Water Science Research Institute,Hohai University,Nanjing 210098,China

出　　处：《Geoscience Frontiers》2025年第1期249-260,共12页地学前缘(英文版)

基　　金：supported by the National Natural Science Foundation of China(Grant No.61771183).

摘　　要：The Ordos Basin,located in arid and semi-arid region of China,is famous for its abundant groundwater resources and artesian features.The source of groundwater recharge,whether from local precipitation or external sources,has been debated.This study aims to elucidate the groundwater circulation mechanism in the Ordos Basin through scientific expedition,environmental isotope method,and hydrological drilling exploration,providing valuable insights for other artesian basins.Comprehensive analysis indicates that groundwater in the Ordos Basin is recharged by modern precipitation,primarily from high-elevation areas outside the basin.Deep groundwater from these external sources ascends to the aquifer through basement fault zones.Evidence from hydrogen and oxygen isotopes,hydraulic gradients,and water quantities suggests that the Tibetan Plateau is the most potential recharge source.Based on the distribution of Cenozoic basalt and data from seismic observation wells,we propose that leakage water from the Tibetan Plateau rift valley is transported to the Ordos Basin through fast channels,possibly lava tubes,and then upwelling through basement fault zones.This work provides a new perspective on the mechanism of inter-basin groundwater circulation.

关 键 词：Groundwater circulation Ordos Basin Artesian basins Deep-circulating groundwater 

分 类 号：P64[天文地球—地质矿产勘探]