Characteristics of groundwater in Northeast Qinghai-Tibet Plateau and its response to climate change and human activities:A case study of Delingha,Qaidam Basin  

作　　者：Wei Zhao Yan-zhu Lin Peng-peng Zhou Guang-cai Wang Xue-ya Dang Xiao-fan Gu 

机构地区：[1]China Institute of Geo-Environment Monitoring,China Geological Survey,Beijing 100081,China [2]State Key Laboratory of Biogeology and Environmental Geology and MOE Key Laboratory of Groundwater Circulation and Environmental Evolution,School of Water Resources and Environment,China University of Geosciences(Beijing),Beijing 100083,China [3]Xi’an Center,China Geological Survey,Xi’an 710054,China

出　　处：《China Geology》2021年第3期377-388,共12页中国地质（英文）

基　　金：This work was supported by the National Natural Science Foundation of China(41672243);the China Geological Survey Program(DD20160291,DD20189270).

摘　　要：Delingha is located in the northeast margin of Qaidam Basin.Bayin River alluvial proluvial fan is the main aquifer of Delingha,in which groundwater generally flows from north to south.The hydrochemistry results showed that two different hydrochemical evolution paths formed along southeast and southwest directions,respectively.Cl-Na type groundwater was formed in front of Gahai Lake,and SO_(4)·HCO_(3)-Na·Ca type groundwater was formed in front of Keluke Lake.The results of deuterium(D)and 18O revealed that the groundwater mainly originated from the continuous accumulation of precipitation during geological history under cold and humid climate conditions.In addition,results of ^(14)C indicated that the groundwater age was more than 1140 years,implying relatively poor renewal capability of regional groundwater.Moreover,our numerical modeling results showed that the regional groundwater level will continue to rise under the warm and humid climate conditions.

关 键 词：GROUNDWATER Global climate change HYDROCHEMISTRY Groundwater circulation Groundwater age Groundwater level rising Geological survey engineering Qaidam Basin Delingha Qinghai-Tibet Plateau 

分 类 号：P641[天文地球—地质矿产勘探] P467[天文地球—地质学]