贺兰山东麓洪积扇含水系统特征研究  

Study on the Characteristics of the Diluvial Fans’Aquifer System at the Eastern Foothills of the Helan Mountains

作　　者：方磊 吴瑞 金亮 韩强强 FANG Lei;WU Rui;JIN Liang;HAN Qiangqiang(Institute of Hydrogeology and Environmental Geology of Ningxia,Yinchuan 710021,China)

机构地区：[1]宁夏回族自治区水文环境地质勘察院,宁夏银川750021

出　　处：《宁夏工程技术》2021年第4期367-371,共5页Ningxia Engineering Technology

摘　　要：为了进一步查清贺兰山东麓洪积扇地下水系统,合理开发利用水资源,妥善处置水环境问题,采用水文地质钻探、岩土测试、物探测井、抽水试验、水化学分析、氘氧同位素分析和^(14)C同位素测年等技术方法,对LS01钻孔进行综合勘查研究。结果表明:LS01钻孔在地表以下150 m处的上下两层水的水动力场和水化学场都具有明显的差异,显示出明显的地下水分层现象,而非单一潜水含水系统;贺兰山东麓洪积扇深层的地下水径流缓慢,更替速度慢,年龄大于1万年,是地质历史时期形成的宝贵水资源。In order to further investigate the groundwater system of the diluvial fans at the eastern foothills of the Helan Mountains,reasonably develop and utilize the water resources,and properly deal with water environment problems,a comprehensive investigation study is conducted on the LS01 borehole,using technical methods such as hydrogeological drilling,geotechnical testing,physical wells exploration,pumping tests,water chemical analysis,deuterium-oxygen isotope analysis and ^(14)C isotope dating.The results show that the hydrodynamic and hydrochemical fields of the upper and lower water layers in borehole LS01 at 150 m below the surface are significantly different,showing obvious groundwater stratification rather than a single submerged water-bearing system.The groundwater in the deeper layers of the diluvial fans has a slow runoff,with a slow replacement rate and an age of more than 10,000 years,which is a valuable water resource formed during the geological history.

关 键 词：贺兰山东麓 洪积扇 分层 地下水流系统 

分 类 号：P641[天文地球—地质矿产勘探]