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Volume 36 Issue 5
Oct.  2017
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Article Navigation >  CARSOLOGICA SINICA  > 2017  >  36(5): 648-658
HUANG Fen, YIN Weilu, HU Xiaonong, CAO Jianhua. A quantitative analysis of tracing tests for the Maocun subterranean river basin of Guilin during rainy and dry seasons[J]. CARSOLOGICA SINICA, 2017, 36(5): 648-658. doi: 10.11932/karst2017y32
Citation: HUANG Fen, YIN Weilu, HU Xiaonong, CAO Jianhua. A quantitative analysis of tracing tests for the Maocun subterranean river basin of Guilin during rainy and dry seasons[J]. CARSOLOGICA SINICA, 2017, 36(5): 648-658. doi: 10.11932/karst2017y32
shu

A quantitative analysis of tracing tests for the Maocun subterranean river basin of Guilin during rainy and dry seasons

doi: 10.11932/karst2017y32
  • 1.

    Institute of Karst Geology, CAGS/Key Laboratory of Karst Dynamics, MLR & GZAR/International Research Centre on Karst, UNESCO

  • 2.

    Institute of Karst Geology, CAGS/Key Laboratory of Karst Dynamics, MLR & GZAR/China University of Geosciences (Beijing)/International Research Centre on Karst, UNESCO

  • Publish Date: 2017-10-25
    Abstract
  • This paper selected the typical underground river basin in Maocun village of Guilin, Guangxi for quantitative tracer tests in rainy and dry seasons based on online high-resolution monitoring to depict fine characteristics of groundwater aqueous media. According to the tracer test results and groundwater runoff and distribution characteristics, the Maocun underground river system is divided into Shegengyan and Bianyan underground river, Dachongli-Beidiping sub-system and Dayanqian sinkholes-Maocun outlet sub-system, which are distributed in upstream and downstream of the Maocun basin, respectively. The experimental tracer study shows that the breakthrough curves (BTC) are featured by steep upward and steep drop pinnacles, which suggest that the conduits are relatively simple, and have no large turnouts and karst tams developed. Each section of the underground river is generally turbulence which is dominated by convection; the flow velocity and flux in rainy seasons are larger, the average travel time is shorter, and the tracer recovery rates are higher than in dry seasons. The aqueous medium in the middle region is relatively uniform, and has no conduit developed. Groundwater is mainly stored in karst cracks.

     

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