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Volume 29 Issue 1
Mar.  2010
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Article Navigation >  CARSOLOGICA SINICA  > 2010  >  29(1): 20-26
WEI Xing-ping, YUAN Dao-xian, XIE Shi-you. Relationship between soil erosion and rocky desertification in Southwest China karst region-A case in Nanchuan karst area, Chongqing[J]. CARSOLOGICA SINICA, 2010, 29(1): 20-26. doi: 10.3969/j.issn.1001-4810.2010.01.004
Citation: WEI Xing-ping, YUAN Dao-xian, XIE Shi-you. Relationship between soil erosion and rocky desertification in Southwest China karst region-A case in Nanchuan karst area, Chongqing[J]. CARSOLOGICA SINICA, 2010, 29(1): 20-26. doi: 10.3969/j.issn.1001-4810.2010.01.004
shu

Relationship between soil erosion and rocky desertification in Southwest China karst region-A case in Nanchuan karst area, Chongqing

doi: 10.3969/j.issn.1001-4810.2010.01.004
  • 1.

    School of Geographic Science, Southwest University，School of Geographic Science, Chongqing Normal University

  • 2.

    School of Geographic Science, Southwest University

  • Received Date: 2009-05-25
  • Publish Date: 2010-03-25
    Abstract
  • The paper takes Nanchuan in Chongqing as an example and obtains change relationship between soil erosion intensity and rocky desertification via TM remote sensing image and Arcgis as well as Erdas software on the basis of map algebra principle to transfer matrix of image data. The results show that the increased area of soil erosion is 9 605.89 hm2 and the decreased area is 79 947.85 hm2 from 1988 to 2000 while the increased area of rocky desertification is 15 078.92 hm2 and the decreased area is 12 492.53 hm2. Rocky desertification is a result of long-term effect of soil erosion and soil erosion is the stage of rocky desertification, i.e. there is causal relationship between them. But the area of rocky desertification lightening lags that of soil erosion. The reason for the lag is that the time for ecological restoration of the rocky desertification is longer than that for soil erosion.

     

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