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Volume 35 Issue 3
Jun.  2016
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Article Navigation >  CARSOLOGICA SINICA  > 2016  >  35(3): 274-281
WU Xia, PAN Mou-cheng, ZHU Xiao-yan, BAI Xiao, ZHANG Bi-yun, ZHANG Mei-liang. The effect of heavy rain event on soil temperature and soil volumetric water content in epikarst during summer[J]. CARSOLOGICA SINICA, 2016, 35(3): 274-281. doi: 10.11932/karst20160305
Citation: WU Xia, PAN Mou-cheng, ZHU Xiao-yan, BAI Xiao, ZHANG Bi-yun, ZHANG Mei-liang. The effect of heavy rain event on soil temperature and soil volumetric water content in epikarst during summer[J]. CARSOLOGICA SINICA, 2016, 35(3): 274-281. doi: 10.11932/karst20160305
shu

The effect of heavy rain event on soil temperature and soil volumetric water content in epikarst during summer

doi: 10.11932/karst20160305
  • 1.

    Institute of Karst Geology, GAGS / Key Laboratory of Karst Dynamics, MLR & GZAR/China University of Geosciences

  • 2.

    Institute of Karst Geology, GAGS / Key Laboratory of Karst Dynamics, MLR & GZAR

  • 3.

    Guangxi Institute of Regional Geological Survey

  • 4.

    Hydrogeological Engineering Geological Party of Guangxi

  • Publish Date: 2016-06-25
    Abstract
  • To discover the carbon cycle in Guilin epikarst, the effect of heavy rain events on soil temperature and soil volumetric moisture has been studied. The HOBO equipment was used to monitor the the soil temperature and soil volumetric moisture content at depths of 20 cm and 70 cm in the summer of 2014 (July and August). The results shows a daily variation at the depth of 20 cm in soil temperature, which is mainly dominated by the daily variation atmosphere temperature. Soil temperature shows a steady increase at the depth of 70 cm, which is dominated by the increased atmospheric temperature due to summer monsoon. At the depth of 20 cm, soil temperature generally decreased and soil volumetric moisture content generally increased during and after the heavy rain events. At the depth of 70 cm, soil temperature increased first and then decreased, while soil volumetric moisture content increased during and after the heavy rain event. In the case of low soil moisture, the deep soil temperature can be elevated when the shallow high-temperature soil water infiltrates down. When the soil volumetric moisture content reaches a certain threshold, it can respond to storm events quickly. The results show that heavy rain events have different effects on soil temperature and soil volumetric moisture content at different depths in the karst area. Shallow soil can quickly respond to the heavy rain events, while the deep soil temperature and soil volumetric moisture content is not only dominated by the rain amount, but also by shallow soil temperature and soil volumetric moisture content.

     

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