[1]YUAN Jing,GAO Hua-duan,ZHANG Xu-xian,et al.Research on the Interlayer Joints of Bedrock in the Karst Region of Guiyang City Based on Soil Erosion[J].Research of Soil and Water Conservation,2012,19(05):167-170.
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Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
19
Number of periods:
2012 05
Page number:
167-170
Column:
Public date:
2012-10-20
- Title:
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Research on the Interlayer Joints of Bedrock in the Karst Region of Guiyang City Based on Soil Erosion
- Author(s):
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YUAN Jing, GAO Hua-duan, ZHANG Xu-xian, WEI Hai-xia
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College of Forestry, Guizhou University, Guiyang 550025, China
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- Keywords:
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soil erosion; interlayer joints; Karst region; Guiyang City
- CLC:
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S157.1
- DOI:
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- Abstract:
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The study on bedrock interlayer joint is the premise and basis to examine the soil erosion mechanism in Karst region. ArcGIS 9.3 software was used to classify, merge, and count the stratigraphy data of Guiyang City, and according to the classification standard of the type of the interlayer joint, the interlayer joint frequency with grade Ⅰ, Ⅱ, Ⅲ, Ⅳ, Ⅴas the classification index was selected. On the basis of a certain scale geological map, the geological map was digitalized according to the statistical data, the interlayer joint frequency distribution map and the carbonate distribution map of Guiyang City were formed. The results showed that the dolomite area accounted for 36% of the total area in Guiyang Karst region, and the limestone area took up 43% of the total area in Karst region of Guiyang. The interlayer joint frequencies of bedrock were grade Ⅰ, Ⅱ, Ⅲ among which grade Ⅰ took up 15% of the total area, grade Ⅱ accounted for 20%, and grade Ⅲ accounted for 44%. In limestone area of Guiyang, the distribution area order of interlayer joint frequency of different levels from high to low was gradeⅢ>gradeⅠ>gradeⅡ;the order was gradeⅢ>gradeⅡ>grade in dolomite area. The high frequency of the interlayer joint frequency was readily formed in the limestone area of Guiyang City.