Application of online technique in tracer test——A case in Qingmuguan subterranean river system,Chongqing,China
Year: 2008
Type: article
Abstract: The recovering state of tracer fluorescent sodium being put into the Qingmuguan underground river is tested by means of high-resolution automatic field fluorometer and artificial sampling as well as adding active carbon after hydrogeologic survey.The results show that :(1) The Jiangjia spring is the major outlet of the Qingmuguan underground river and 93.9 % of the total amount of tracer that has been put into the river at Yankou sinkhole is recovered.The time the tracer begins to appear is 33.3h;the maximum linear velocity is 222.2m/h and the dominant linear flow velocity 172.1m/h,the average velocity 176.6m/h.Those prove that the groundwater assumes typical turbulent flow in this tested section of the underground river,and the medium is quite uneven,or there could be large conduit without branches.(2) There is no direct hydraulic relation between Yankou sinkhole and Damushuiwo spring,Zhichang spring.There is also no direct hydraulic relation between the outlet Jiangjia spring and Zhichang spring.(3) Because the field automatic fluorometer is highly precious,quite automobile and handy,all this made the test very economical,so it is of high application value in tracer test in southwest China.
Source: Zhongguo yanrong
Author: Lin Yu-shi
Institution: Chinese Academy of Geological Sciences
Language: English
Subfield: Earth-Surface Processes
Field: Earth and Planetary Sciences
Domain: Physical Sciences
Open Access status: diamond
OpenAlex ID: W2386676276