摘要
以重庆市彭水县岩窝坨至纸厂泉段地下河为研究对象,将荧光素钠作为示踪剂,利用在线高分辨率示踪技术获取地下水中荧光素钠穿透曲线,结合定量计算方法分析地下河管道几何特征.结果表明:试验示踪剂回收率为82.2%,证明纸厂泉为该流域岩溶地下水的主要排泄出口;穿透曲线为双峰型,表明岩窝坨至纸厂泉段岩溶地下河存在2条并联的岩溶管道.定量计算发现地下河储水管道的平均直径为17m,储水体积为4.5×106 m3.
It is relatively difficult to research the conduit structure in karst subterranean rivers in South China due to the high heterogeneity of their water-containing media.A case study was made of the conduit section of a subterranean river from Yanwotuo to Zhichang Spring in Pengshui County,Chongqing.A technique of online and high-resolution tracing test was employed with uranine as the tracer.The breakthrough curve（BTC）of the uranine in the karst groundwater was obtained to quantitatively investigate the geometrical characteristics of the conduit structure and the flow field.The results showed that the recovery mass rate of the injected uranine was as high as 82.2%,indicating that the Zhichang Spring was the main discharging outlet of the karst watershed basin,and the breakthrough curve（BTC）presented a doublepeaked shape,indicating the existence of two parallel karst conduits in the study area.Based on a quantitative calculation of the BTC,the mean diameter of the conduits and the water volume in the karst aquifer were 17 mand 4.5×10^6 m^3,respectively.In conclusion,owing to its characteristics of high precision,high automatic degree and low cost,the technique of the online and high-resolution tracing test can be widely applied in karst hydrogeology surveys.
出处
《西南大学学报（自然科学版）》
CAS
CSCD
北大核心
2015年第10期125-130,共6页
Journal of Southwest University(Natural Science Edition)
基金
广西岩溶动力学重点实验室开放基金(KDL2012-08)
重庆市国土资源和房屋管理局科技计划项目(CQGT-KJ-2012022
CQGT-KJ-2014056)
中央高校基本科研业务费专项资金(XDJK2014A016)
关键词
在线高分辨率
示踪试验
地下河
岩溶管道
彭水县
online and high-resolution
tracing test
subterranean river
karst conduit
Pengshui County
作者简介
刘树林（1984-），男，四川泸州人，工程师，主要从事水文地质、环境地质研究．
通信作者：杨平恒，副教授．
