[1]WANG Li-qin,LI Hong-li,DONG Zhi,et al.Particle Size Characteristics of Sediment Profile in Gobi of Ejina Basin[J].Research of Soil and Water Conservation,2014,21(01):152-156,162.
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Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
21
Number of periods:
2014 01
Page number:
152-156,162
Column:
Public date:
2014-02-28
- Title:
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Particle Size Characteristics of Sediment Profile in Gobi of Ejina Basin
- Author(s):
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WANG Li-qin1, LI Hong-li1, DONG Zhi1, SHEN Yun-kuo1, ZHANG Zhi-peng1, YANG Wen-bin2
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1. Taishan Forest Ecosystem Research Station, Shandong Provincial Key Laboratory of Soil Erosion and Ecological Restoration, College of Forestry, Shandong Agricultural University, Tai’an, Shandong 271018, China;
2. Institute of Desertification Studies, Chinese Academy of Forestry, Beijing 100091, China
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- Keywords:
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Gobi; sediments; profile; particle size composition; particle size characteristics; Ejina basin
- CLC:
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P588.21,X141
- DOI:
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- Abstract:
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By taking the Ejina Basin region as the research site, the particle size composition of sediment profile in gobi, average particle size, sorting coefficient, skewness and kurtosis were analyzed by field investigation and laboratory test. The results show that each sample point along the vertical direction from top to bottom sediment particle size composition from stone into sand on the longitudinal sediment. Except for the top of alluvial fan, the average grain size changed smaller and had significantly thinner trend by vertical direction. The grain sorting coefficient in different profile layers was poor or poorer, but only it was better or medium on near shore lake shallow and lake side. Except for the top of alluvial fan, the skewness was from negative to very negative, in other points; the skewness of sediment particle from top to bottom tends to nearly symmetry and positive distribution by the vertical direction. The kurtosis in the top of alluvial fan and in the middle of alluvial fan sediment were flat, while from the alluvial fan edge to lake side sediment by flat, wide flat into sharp distribution from the bottom up. All in all, the sediment profiles of gobi appeares the characteristics of fine average grain size, poor or pooer sorting coefficient, nearly symmetry and positive skewness and flat kurtosis, which reflects the particles in different levels of sedimentary environment, geomorphic feature, erosion and deposition pattern, and can provide the basis for the gobi classification.