[1]XU Quan-bin,FU Wa-li,SUN Lu,et al.Study on Soil Anti-erodibility for the Water Level-fluctuating Zone in Three Gorges Reservoir Area[J].Research of Soil and Water Conservation,2009,16(05):13-18.
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Study on Soil Anti-erodibility for the Water Level-fluctuating Zone in Three Gorges Reservoir Area
Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
16
Number of periods:
2009 05
Page number:
13-18
Column:
Public date:
2009-10-20
- Title:
- Study on Soil Anti-erodibility for the Water Level-fluctuating Zone in Three Gorges Reservoir Area
- Keywords:
- Three Gorges reservoir area; water level-fluctuating zone; soil anti-erodibility; principal component analysis; correlation analysis
- CLC:
- S157.1
- DOI:
- -
- Abstract:
- With the formation of water-level-fluctuating zone of the Three Gorges reservoir area in 2009,its original status of the ecological environment will no longer exists,a number of important parameters and data of the ecological environment may not be able to access.Based on the 28 soil samples which were taked from the different lots and different elevation (145～175m) of the water level-fluctuating zone of the Three Gorges reservoir area in the July 2008,this article analyzed the soil anti-erodibility of 28 soil samples.15 indexes were used to analyze the soil anti-erodibility by means of PCA and obtained the 4 categories of water-stable aggregate type,inorganic colloid type,aggregate type,and organic and index of soil water-stable type that reflect 83.39% of the information of the eigenvalues.Through the contribution rate of the four principal component factor as the principal component weighting coefficients,soil anti-erodibility comprehensive index calculation equation can be obtaind and PCA comprehensive exponent of anti-erodibility index can be calculated.According to correlation analysis of the several soil anti-erodibility factor and PCA comprehensive exponent of anti-erodibility index,we can discover that the soil organic matter content in the water level-fluctuating zone of the Three Gorges reservoir area is very lower (an average of 15.88g/kg),the main cement material is <0.001mm inorganic clay,its correlation coefficient is 0.629 with the PCA comprehensive exponent of anti-erodibility index.This shows that inorganic clay <0.001mm content of water-level-fluctuating have great influence on soil anti-erodibility.
- References:
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