水化学分析在勘探确认地下河管道中的应用——以寨底地下河系统试验基地为例  

Application of hydro-chemical analysis for surveying and confirming the groundwater river conduit:A case in the experiment base of Zhaidi ground-river system

作　　者：易连兴[1] 夏日元[1] 卢东华[1] 

机构地区：[1]中国地质科学院岩溶地质研究所,广西桂林541004

出　　处：《工程勘察》2012年第2期43-46,共4页Geotechnical Investigation & Surveying

基　　金：所控项目"缝洞含水介质地下水系统评价模型--以桂林寨底地下河为例";(2009004);国家修购专项"海洋-寨底岩溶地下河系统野外实验基地维修改造";(2010209)

摘　　要：在寨底地下河系统内的东究地下河中段,3个钻孔在埋深16～30m处揭露稳定水位及孔洞,水样平均矿化度为264.15mg/L,通过水化学分析,推测该部分地下水为局部上层滞水,所揭露的孔洞不是地下河主管道;经深入钻探找到了深部溶洞水,矿化度为159.21mg/L并与上游进口、下游出口矿化度比较,论证确认该溶洞为地下河主管道,验证了推测结果,最终获得了准确的地下河系统中上游、中下游水力坡度分别为9.07%、2.33%。At the middle part of the Dongjiu ground-river, some karst holes and stable water levels are discovered between 16 to 30m depth in three drills. By hydro-chemical analysis average mineralizing degree is 264.15 mg/L, and it concludes that those water is only local aquifer and those holes are not the ground river conduit. The groundwater mineralizing degree for another karst hole is 159.21mg/L, and it confirms that this karst hole is real the ground river conduit by comparing the mineralizing degree with up- stream and down-stream. At last, it obtains the hydraulic gradients for up-stream and down-stream about 9.07% , 2.33%.

关 键 词：地下河 上层滞水 水化学 矿化度 

分 类 号：P641.3[天文地球—地质矿产勘探]