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Volume 32 Issue 2
Jun.  2013
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CHEN Xue bin, ZHOU Jun, LAN Jia cheng, XIAO Jing ge, YANG Ping heng. Flow field inversion of karst underground river and estimation of hydrogeological parameters based on online tracer technique[J]. CARSOLOGICA SINICA, 2013, 32(2): 148-152. doi: 10.3969/j.issn.1001-4810.2013.02.004
Citation: CHEN Xue bin, ZHOU Jun, LAN Jia cheng, XIAO Jing ge, YANG Ping heng. Flow field inversion of karst underground river and estimation of hydrogeological parameters based on online tracer technique[J]. CARSOLOGICA SINICA, 2013, 32(2): 148-152. doi: 10.3969/j.issn.1001-4810.2013.02.004

Flow field inversion of karst underground river and estimation of hydrogeological parameters based on online tracer technique

doi: 10.3969/j.issn.1001-4810.2013.02.004
  • Received Date: 2012-12-19
  • Publish Date: 2013-06-25
  • A high-resolution online tracer test is performed in the Qingmuguan karst underground river system to get essential data for researching the morphologic features of karst underground river and estimate hydrogeological parameters. The recovery rate of the tracer is 99 %. The break-through curve of the tracer has two peaks. The first and the second peak value is respectively 37.63 and 1.21. The skewness and kurtosis of the two peaks are both greater than 0. The results of test confirmed that there is no pond developed in the Qinmuguan karst underground river. And the groundwater flow is turbulent. The paper presents empirical formulas and the formulas with practical physical meaning according to the test data and geospatial information of the underground river. The mean velocity of groundwater,friction factor, Reynolds number, Sherwood number and Schmidt number were estimated by these formulas, and the value is respectively 204 m/d, 0.26, 127 980, 4 165,1 140. These parameters show that the structure is complex in the pipeline of the Qingmuguan underground river and the environment of groundwater is vulnerable. In addition, the flow state that is represented by the estimated Reynolds number is consistent with the result that comes from concentration curve of the tracer.

     

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