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Volume 38 Issue 1
Feb.  2019
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Article Navigation >  CARSOLOGICA SINICA  > 2019  >  38(1): 10-18
LIANG Risheng, ZENG Cheng, YAN Zhiwei, SHI Biao, HE Shiyi, FAN Yuhong, GUAN Jin. Recession flow analysis for Longdongwan spring at Langxi karst valley in Yinjiang county, Guizhou Province[J]. CARSOLOGICA SINICA, 2019, 38(1): 10-18. doi: 10.11932/karst20190102
Citation: LIANG Risheng, ZENG Cheng, YAN Zhiwei, SHI Biao, HE Shiyi, FAN Yuhong, GUAN Jin. Recession flow analysis for Longdongwan spring at Langxi karst valley in Yinjiang county, Guizhou Province[J]. CARSOLOGICA SINICA, 2019, 38(1): 10-18. doi: 10.11932/karst20190102
shu

Recession flow analysis for Longdongwan spring at Langxi karst valley in Yinjiang county, Guizhou Province

doi: 10.11932/karst20190102
  • 1.

    State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, CAS, Guiyang, Guizhou 550081,China/College of Environmental Science and Engineering, Guilin University of Technology, Guilin, Guangxi 541004, China

  • 2.

    State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, CAS, Guiyang, Guizhou 550081,China

  • 3.

    College of Environmental Science and Engineering, Guilin University of Technology, Guilin, Guangxi 541004, China

  • 4.

    Water Affairs Bureau of Yinjiang Tujia and Miao Minority Autonomous County, Yinjiang, Guizhou 555200, China

  • 5.

    Institute of Karst Geology, CAGS, Guilin, Guangxi 541004, China

  • Publish Date: 2019-02-25
    Abstract
  • Longdongwan karst spring is situated in Langxi town, Yinjiang Tujia and Miao Autonomous county, Tongren City, Northeastern Guizhou Province, China. The karst spring occurs on the south-east side of the axis of Langxi trough-like syncline valley, which is a fault spring formed by partial water-resisting section of compressive-torsional faults to prevent groundwater from overflowing. The objective of this study is to understand the aquifer structure of high-level karst springs in the upper part of the mountain in karst valley area, so as to provide scientific basis for management and rational utilization of high-level karst springs in karst valley area. The high-resolution automatically recorded rainfall and water level data from the spring have been collected by using compound weir and automatic hydro-meteorological monitor. The spring flow rate is calculated by hydraulic equations. The characteristics of the flow regime of the karst spring are analyzed. The karst aquifer structure and sub-water storage are estimated by recession flow analysis based on interval exponential function. It is found that, (1) The time lag between peaks of rainfall intensity and flood is strongly affected by the curve shape of the rainfall intensity. The time lag will be short if there is heavy rainfall or previous rainfall influence. Inversely, it will be long if there is small rainfall or little previous rainfall influence.(2) After heavy rainfall event, the natural recession flow of the Longdongwan karst spring has 3 sub-regimes, and the recession coefficients are distinctly different. The recession coefficient of Stage I and Stage II is 11 times and 3 times as large as that of Stage III respectively, indicating that the characteristics of triple carbonate rock medium are obvious.(3) The aquifer medium of the Longdongwan karst spring is heterogeneous due to strong karst processes. The groundwater is dominated by conduit and fissure flows.

     

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