兰州市区地下水矿化度分布特征及成因分析  

Distribution characteristics and origin of total dissolved solids in groundwater under Lanzhou City

作　　者：吕晓立[1,2] 邵景力[2] 刘景涛[1] 温吉利[1] 孙继朝[1] 

机构地区：[1]中国地质科学院水文地质环境地质研究所,石家庄050061 [2]中国地质大学(北京),北京100083

出　　处：《干旱区资源与环境》2013年第7期23-27,共5页Journal of Arid Land Resources and Environment

基　　金：中国地质调查局地质调查项目:西北地区主要城市地下水污染调查评价项目(1212011121165)资助

摘　　要：以兰州市地下水样宏量化学组分测试结果为依据,采用统计分析和对比分析方法,研究了兰州市区地下水矿化度的分布及其成因。结果表明:现状条件下研究区地下水矿化度(TDS)普遍偏高,变化范围在340至18300mg/L之间,平均值为2212mg/L。广泛分布的第三系地层是地下水盐分的重要来源,开采引起的地下水位下降是引起市区水源地地下水矿化度升高的重要驱动因素,工业污染是引起地下水矿化度升高的潜在因素。The main chemical composition of the groundwater in Lanzhou was investigated.According to the analysis results of 40 samples collected from Lanzhou city area,the total dissolved solid（TDS） is universally high than drinking water standard,and the fresh water only distributed along the Yellow River.Among the 40 samples collected,the TDS is among 340 and 18300 mg/L,with average value of 2212 mg/L,and over 52.5% of the samples have TDS higher than 1000mg/L.The occurrence and distribution of high TDS groundwater have close relationship with the distribution of Tertiary strata,change of groundwater level by pumping is the driving factor of TDS rise,pollution is another factor caused the rise of TDS.

关 键 词：兰州市区 地下水 矿化度 

分 类 号：P641.11[天文地球—地质矿产勘探]