Characteristics of Soil Particle Fractal Dimension After Formation of Water Area in Tail-streams of Shiyang River

LIU Shu-juan; YUAN Hong-bo; LIU Shi-zen; LIU Hu-jun; LI Fa-ming; GUO Shu-jiang; WANG Qi; GUO Chun-xiu; LI Jing-jing; WEI Huan-dong

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Characteristics of Soil Particle Fractal Dimension After Formation of Water Area in Tail-streams of Shiyang River

- Characteristics of Soil Particle Fractal Dimension After Formation of Water Area in Tail-streams of Shiyang River
- Bulletin of Soiland Water Conservation Vol. 32, Issue 6, Pages: 285-289(2013)
- 作者机构：
  
  甘肃省荒漠化与风沙灾害防治重点实验室/省部共建国家重点实验室培育基地甘肃民勤荒漠草地生态系统国家野外科学观测研究站甘肃省治沙研究所,甘肃,兰州,730070
- 作者简介：
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- Published：2013
- 稿件说明：
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LIU Shu-juan, YUAN Hong-bo, LIU Shi-zen, et al. Characteristics of Soil Particle Fractal Dimension After Formation of Water Area in Tail-streams of Shiyang River[J]. Bulletin of Soiland Water Conservation, 2013, 32(6): 285-289.
DOI：

LIU Shu-juan, YUAN Hong-bo, LIU Shi-zen, et al. Characteristics of Soil Particle Fractal Dimension After Formation of Water Area in Tail-streams of Shiyang River[J]. Bulletin of Soiland Water Conservation, 2013, 32(6): 285-289. DOI：

摘要

青土湖是石羊河的尾闾湖

观测分析了距青土湖水面边缘0-500m范围内的土壤颗粒粒径分布、分形维数及其与土壤颗粒含量的关系。结果表明

0-20cm和20-40cm土层土壤颗粒的分形维数范围分别在2.3708~2.8796和2.3590~2.7509。在0~150m范围内

0-20cm土层土壤粒径分形维数与水面间距呈缓慢增加趋势

在150m处达到最大(2.8796)

随后逐渐降低而20-40cm土层在0~100m范围内呈缓慢增加趋势

在100m处分形维数达到最大(2.7509)土壤颗粒分形维数大小与土壤质地的细粒化有一致的变化趋势

且与大于0.05mm粒径含量呈极显著负相关关系

而与黏粒含量、粉粒含量呈极显著正相关关系。小于0.05mm粒径物质含量的增加和>0.05mm粒径物质含量的降低共同导致了土壤颗粒分形维数在水面形成150m范围内的增大

说明水面形成对土壤粒径的影响范围在0~150m。

Abstract

Qingtu Lake is the tail-streams of Shivang River.The soil particle size distribution

the fractal dimension and the relationships between the fractal dimension of soil particle size and fractal dimension within the distance of 0-500 m of the edge of Qingtu Lake's surface were analyzed.The results showed that:the range of fractal dimension of soil particles in 0-20cm

20-40 cm soil layer were 2.3708-2.8796 and 2.3590-2.7509 respectively. Fractal dimension of 0-20 cm soil layer had a slowly increasing trend in the range of 0-150 m and reached the maximum(2.8796)at 150 m

then it gradually decreased;Fractal dimension of 20-40 cm soil layer was slowly increasing within 100 m and at 100 m reached the maximum(2.7509);The soil fractal dimension had a significant negative correlation with sand content

and significant positive correlation with proportion content of silt and clay.Both the increase of particle content with diameter<0.05 mm and decrease of particle content with diameter>0.05 mm caused the increase of fractal dimension of soil particle size after the formation of water area.

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