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Volume 29 Issue 1
Mar.  2010
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Article Navigation >  CARSOLOGICA SINICA  > 2010  >  29(1): 1-5
WANG Ji, CAI Xiongfei, LEI Li, ZHANG Hao. Laboratory simulation on soil erosion under different bedrock outcrop ratein Southwest karst area, China[J]. CARSOLOGICA SINICA, 2010, 29(1): 1-5. doi: 10.3969/j.issn.1001-4810.2010.01.001
Citation: WANG Ji, CAI Xiongfei, LEI Li, ZHANG Hao. Laboratory simulation on soil erosion under different bedrock outcrop ratein Southwest karst area, China[J]. CARSOLOGICA SINICA, 2010, 29(1): 1-5. doi: 10.3969/j.issn.1001-4810.2010.01.001
shu

Laboratory simulation on soil erosion under different bedrock outcrop ratein Southwest karst area, China

doi: 10.3969/j.issn.1001-4810.2010.01.001
  • 1.

    School of Geographic and Environmental Sciences, Guizhou Normal University

  • 2.

    Institute of Mountain Hazards and Environment, Chinese Academy of Sciences，Graduate School of Chinese Academy of Sciences

  • Received Date: 2009-07-13
  • Publish Date: 2010-03-25
    Abstract
  • This paper chooses Southwest China karst area as the research region. On the basis of data analysis and field research work, a rain-simulator is designed, which could fulfill the range of rainfall intensity in this area. Twelve processes of soil erosion simulation are made on the slopes with different gradient under different bedrock outcrop rate. Results of the simulation are as follows: (1) The slopes runoff ratio keeps steady after 180～300 s and hardly changes with the increase of gradient. (2) The change trend of transport rate of sediment yield can be divided into five periods: rapid increase, decrease, increase, slow decrease and steady. The transport rate of sediment yield decreases with the increase of the bedrock outcrop rate on same or different slopes, and the changing extent decreases by 40.2% to 1.0% with the increase the of slope. (3) The total sediment yield decreases with the increase of the bedrock outcrop rate on same or different slopes, and the changing extent decreases with the increase of the slope.

     

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