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[1]YUAN Jie,CAO Guangchao,E Chongyi,et al.Grain Size Distributions of the Surface Soil Deposit Around Qinghai Lake and Its Implications[J].Research of Soil and Water Conservation,2015,22(03):150-154.

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Grain Size Distributions of the Surface Soil Deposit Around Qinghai Lake and Its Implications

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 22 Number of periods: 2015 03 Page number: 150-154 Column: Public date: 2015-06-28

Title:: Grain Size Distributions of the Surface Soil Deposit Around Qinghai Lake and Its Implications

Author(s):: YUAN Jie¹, CAO Guangchao¹, E Chongyi¹, YUAN Youjing²; 1. Key Laboratory of Qinghai Province Physical Geography and Environmental Process, Qinghai Normal University, Xi’ning 810008, China;
2. Environmental Geological Prospecting Bureau of Qinghai Province, Xi’ning 810000, China

Keywords:: Qinghai Lake; soil particle diameter; characteristic of grain size

CLC:: P512.2

DOI:: -

Abstract:: The research of analyzing the particle size feature distribution of 38 surface soil deposit samples collected from the areas around the Qinghai Lake showed that the main component of the surface soil deposit is silt accounting for 52% in the composition of soil grain. The sand content is 37%, and is the second largest. And the clay content is 11%, and is the least. The percentage of the particle size of the surface soil which is under the main vegetation types in the 38 sample points which are around the Qinghai Lake presents that silt content is more than sand content, and sand content is more than clay content. The feature of particle size distribution of the surface soil deposit collected from the east of the Qinghai Lake presents unimodal pattern, the west of the Qinghai Lake presents asymmetrical bimodal pattern, it is close to normal distribution in the south of the Qinghai Lake, it presents multimodal pattern in the north of the Qinghai Lake. The average particle size of the surface soil deposits collected around the Qinghai Lake area is between 1.96～6.71Ф, with an average of 4.68Ф, which is at the level of silt. The kurtosis values ranges from 0.75 to 1.89 with an average of 1.09. The standard deviation varies from 0.81 to 2.63 with an average of 1.77. And the skewness ranges from -0.03 to 0.43 with an average of 0.14. The analytical results reveal that the east area of Qinghai Lake is typical eolian sand deposition in the surface soil, it is eolian loess in the west and south of Qinghai Lake, and the soil deposits are complex and diverse in the north of Qinghai Lake.

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