Grain-Size Fractal Characteristics of Fluvial Sediment in Xianyang Section of Weihe River

SHI Xing-min; HAN Yan

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Grain-Size Fractal Characteristics of Fluvial Sediment in Xianyang Section of Weihe River

- Grain-Size Fractal Characteristics of Fluvial Sediment in Xianyang Section of Weihe River
- Bulletin of Soiland Water Conservation Vol. 30, Issue 2, Pages: 22-26(2011)
- 作者机构：
  
  1. 陕西师范大学旅游与环境学院
  2. 成都理工大学地球科学学院
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Published：2011
- 稿件说明：
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SHI Xing-min, HAN Yan. Grain-Size Fractal Characteristics of Fluvial Sediment in Xianyang Section of Weihe River[J]. Bulletin of Soiland Water Conservation, 2011, 30(2): 22-26.
DOI：

SHI Xing-min, HAN Yan. Grain-Size Fractal Characteristics of Fluvial Sediment in Xianyang Section of Weihe River[J]. Bulletin of Soiland Water Conservation, 2011, 30(2): 22-26. DOI：

摘要

对渭河咸阳段高漫滩沉积物的粒度分形进行了研究。首先确定沉积物粒度分布具有分形特征的无标度区

然后计算出分维数。在无标度区范围内相关系数R2均大于0.95

沉积物粒度平均分维值为2.12

说明沉积物粒度分布具有很好的分形特征。将分维值作为一种新的沉积物粒度分析参数

与其传统粒度参数如平均粒径、标准偏差(σ)、偏度(SK)、峰度(KG)进行比较

利用SPSS软件分析Pearson相关系数

得出粒度分维值与其平均粒径的相关系数为0.807

与其标准偏差的相关系数为0.707

与其峰度的相关系数为0.675

与其偏度的相关系数为0.112。分析结果表明

沉积物粒度分维值与其平均粒径、标准偏差、峰度呈现明显的正相关关系

与其偏度呈现出并不明显的正相关关系。

Abstract

Fractal theory was applied to analyze grain size distribution of the sediment of Weihe River in Xianyang City.The fractal scaleless range and the fractal dimension of grain size distribution were determined.In the non-scaled range

the correlation coefficients(R2) of 53 samples were all higher than 0.95 and the average fractal dimension was 2.12

which shows that the distribution of sediment particle size exhibited good fractal characteristics.The fractal dimension as a new parameter of sediment grain size analysis was compared with traditional granularity index such as mean-diameter(Φ)

standard deviation(σ)

skewness and kurtosis.The correlation coefficients of fractal dimension of sediment grain size with mean diameter

standard deviation

kurtosis and skewness are 0.807

0.707

0.675

and 0.112

respectively

implying fractal dimension correlated significantly positively with mean diameter

standard deviation and kurtosis

but insignificantly positively with skewness.

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