[1]弥智娟,穆兴民,赵广举.黄土高原水蚀风蚀交错区小流域泥沙粒径的分形分析[J].水土保持研究,2014,21(01):12-17.
　MI Zhi-juan,MU Xing-min,ZHAO Guang-ju.Multifractal Analysis of Sediment Grain Size in a Small Watershed of Water-wind Erosion Crisscross Region on the Loess Plateau[J].Research of Soil and Water Conservation,2014,21(01):12-17.
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黄土高原水蚀风蚀交错区小流域泥沙粒径的分形分析

《水土保持研究》[ISSN:1005-3409/CN:61-1272/P] 卷: 21 期数: 2014年01期 页码: 12-17 栏目: 出版日期: 2014-02-28
Title:
Multifractal Analysis of Sediment Grain Size in a Small Watershed of Water-wind Erosion Crisscross Region on the Loess Plateau
作者:
弥智娟1, 穆兴民2,3, 赵广举2,3
1. 西北农林科技大学 水利与建筑工程学院, 陕西 杨凌 712100;
2. 西北农林科技大学 水土保持研究所, 陕西 杨凌 712100;
3. 中国科学院 水利部 水土保持研究所, 陕西 杨凌 712100
Author(s):
MI Zhi-juan1, MU Xing-min2,3, ZHAO Guang-ju2,3
1. College of Water Resource and Architectural Engineering, Northwest A & F University, Yangling, Shaanxi 712100, China;
2. Institute of Soil and Water Conservation, Northwest A & F University, Yangling, Shaanxi 712100, China;
3. Institute of Soil and Water Conservation, Chinese Academy and Sciences and Ministry of Water Resources, Yangling, Shaanxi 712100, China
关键词:
淤地坝; 泥沙粒径; 分形维数; 多重分形; 黄土高原
Keywords:
checkdam; sediment size; fractal dimension; multifractal characteristics; Loess Plateau
分类号:
S152.3
摘要:
泥沙颗粒特征是表征泥沙表面形态、泥沙机械组成、排列模式及泥沙絮凝现象的主要物理属性之一。在水土流失严重的水蚀风蚀交错区，不同地表覆被类型的侵蚀产沙方式和粗泥沙的侵蚀产沙强度很不均衡，导致其泥沙粒径分布的差异很大。以黄土高原典型淤地坝为例，采用分形原理和多重分形理论研究淤地坝坝控小流域泥沙粒径的分形特征，结果表明：淤地坝坝内泥沙与坡面泥沙存在线性关系，相关系数高达0.93；泥沙粒径分形维数D在淤地坝坝内垂直方向上随泥沙颗粒的增大而减小；分形的5个特征参数D，D（0），D（1），D（2），D（0）/D（1）均表明不同地表覆被类型下，草地的粒度分布较均匀，裸地次之，分布最狭窄的是砂岩，该结果可为小流域泥沙来源和水土保持治理措施提供重要依据。
Abstract:
Grain size is one of the most important physical attributes due to its influence on sediment properties related to surface morphology of sediment, the mechanical composition of sediment, the arrangement of grains and flocculation of cohesive of sediment. So in the water-wind erosion crisscross region, ways of sediment generation have strong discrepancy with different patterns of surface cover, which lead to the differences in grain size distribution. In this paper, special dam on the Loess Plateau was taken as an example. The fractal dimension and multifractal theory were applied to study the fractal characteristics of grain size distribution in the checkdam and potential sediment sources. The results show that a good linear relationship between the sediment deriving from the slope and the sediment which deposited in the checkdam were found. Fractal dimension (D) in the checkdam decrease with the increase of sediment particles in the vertical direction. The same result is reflected by the five parameters such as D, D(0), D(1), D(2), D(0)/D(1). Under different types of surface cover, the grain size distribution of the grassland is uniform, bare land is the secondary, and the most narrow distribution is observed in sandstone. So the grassland, bare land and sandstone can allow the determination of sediment sources. Our results could be used to study the sediment source of small watershed and provide an important basis with soil and water conservation.

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备注/Memo

收稿日期:2013-11-12;改回日期:2013-12-30。
基金项目:中国科学院重点部署项目“近百年黄土高原侵蚀环境与水沙变化”（KZZD-EW-04）；国家自然科学基金“皇甫川流域泥沙来源的复合指纹示踪研究”（41201266）；中国科学院2011年西部之光项目“气候变化与人类活动对皇甫川水沙变化贡献的定量评价（2011ZD03）
作者简介:弥智娟(1987-),女,陕西蒲城人,硕士研究生,研究方向:生态水文、水土保持研究。E-mail:mzj_sh@163.com
通讯作者:穆兴民(1961-),男,陕西华阴人,研究员,博士生导师,主要从事生态水文、水土保持究。E-mail:xmmu@ms.iswc.ac.cn

更新日期/Last Update: 1900-01-01