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%.
出处
《工程勘察》
CSCD
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)
关键词
地下河
上层滞水
水化学
矿化度
ground river
local aquifer
hydro-chemical
mineral gradient
