托木尔峰冰川径流中悬移质粒度特征

干旱区研究 ›› 2011, Vol. 28 ›› Issue (3): 449-454.

托木尔峰冰川径流中悬移质粒度特征

高文华¹, 李忠勤^1,2, 张明军¹

1. 西北师范大学地理与环境科学学院, 甘肃兰州 730070;
2. 中国科学院寒区旱区环境与工程研究所冰冻圈科学国家重点实验室 /天山冰川站, 甘肃兰州 730000

收稿日期:2010-04-07 修回日期:2010-08-16 出版日期:2011-06-25 发布日期:2011-09-06
作者简介:高文华(1985-),女,山西阳泉人,硕士研究生,主要从事冰川水文与水化学方面研究.E-mail:gaowenhua-666@163.com
基金资助:
国家重点基础研究发展规划项目(2007CB411501); 中国科学院知识创新工程重要方向项目(KZCX2-YW-127); 国家自然科学基金项目(40631001, 40571033,40701035, 40371028, J0630966); 国家基金委创新群体项目(40121101); 教育部新世纪优秀人才支持计划(NCET-10-0019) 资助

Study on Particle-size Properties of Suspended Load in Glacier Runoff from the Tomor Peak

GAO Wen-hua¹, LI Zhong-qin^1,2, ZHANG Ming-jun¹

1. College of Geography and Environmental Science, Northwest Normal University, Lanzhou 730070, China;
2. State Key Laboratory of Cryospheric Sciences, Cold and Arid Regions Environmental and Engineering Research Institute, CSA, Lanzhou 730000, China

Received:2010-04-07 Revised:2010-08-16 Online:2011-06-25 Published:2011-09-06

摘要/Abstract

摘要： 利用2008年8月天山托木尔峰青冰滩72号冰川的考察资料,应用数理统计等方法,对该冰川区径流中悬移质粒度特征进行分析。结果表明:冰川径流中悬移质以细颗粒物质为主,且各个粒度组分含量变化幅度较大,粒度组成中约68%的颗粒物粒径小于63 μm,32%的颗粒物粒径大于63 μm,粒径小于4 μm颗粒物占1.34%,粒度分布为双峰模式。悬移质各个粒度与含沙量的关系不同,随含沙量的增加,沙粒的贡献量逐渐增大,粉粒和黏粒的贡献量逐渐减小。河流中的悬移质随径流量的增加变化不显著,这种较弱的相关性也表明冰川径流中悬移质主要受泥沙补给来源的控制,雪冰融水的增加能增大河流中沙粒物质的含量,而降水事件的发生能增加河流中粉沙物质的含量。

关键词: 冰川径流, 悬移质, 含沙量, 粒度组成, 青冰滩72号冰川, 托木尔峰

Abstract: Based on the data of suspended load in Glacier No.72 runoff at Qingbingtan in the Tomor Peak region, measured in August 2008, in this paper the mathematical statistical method is used to find out the particle size properties of suspended load in glacier runoff. The results show that the suspended load was dominated by fine materials, there was a high fluctuation in the contents of grain-size components of suspended load, the proportions of particles <63 μm, >63 μm and <4 μm were 68%, 32 % and 1.34 % of the total suspended load respectively, and their distribution curves were bimodal. There were different relationships between silt content and grain size of suspended load. With an increase of silt content, sand-sized material increased, but silt-sized and clay-sized materials decreased. There was no significant relationship between particle size parameters and discharge. Such weak correlation reveals that the suspended load of glacier runoff is mainly affected by the sand-silt source regime, ice-snow melt water can increase sand-sized material, and precipitation events can increase the silt-sized material.

Key words: glacier runoff, suspended load, particle size composition, Glacier No.72, Tomor Peak

中图分类号:

P343.6

高文华, 李忠勤, 张明军. 托木尔峰冰川径流中悬移质粒度特征[J]. 干旱区研究, 2011, 28(3): 449-454.

GAO Wen-hua, LI Zhong-qin, ZHANG Ming-jun. Study on Particle-size Properties of Suspended Load in Glacier Runoff from the Tomor Peak[J]. , 2011, 28(3): 449-454.

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