湖北低山丘陵区侵蚀泥沙颗粒特征及其与地形因子的关系

朱方方; 程金花; 王书韬; 李语晨

doi:10.13870/j.cnki.stbcxb.2021.04.005

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湖北低山丘陵区侵蚀泥沙颗粒特征及其与地形因子的关系

更新时间：2025-03-12

- 湖北低山丘陵区侵蚀泥沙颗粒特征及其与地形因子的关系
- Characteristics of Eroded Sediment Particles and Their Relationship with Topographical Factors in the Low Mountain and Hilly Area of Hubei Province
- 水土保持学报 2021年35卷第4期页码：27-33
- 作者机构：
  
  1. 北京林业大学水土保持学院,北京,100083
  2. 国家林业局水土保持与荒漠化防治重点实验室,北京,100083
- 作者简介：
  
  [ "朱方方(1993-),女,硕士研究生,主要从事土壤侵蚀研究。E-mail:Fangf0506@163.com" ]
- 基金信息：
  
  国家重点基础研究发展计划项目（2017YFC0505504，2017YFC050550401）国家自然科学基金项目（32071839）
- DOI：10.13870/j.cnki.stbcxb.2021.04.005
  中图分类号： 157.1
- 纸质出版：2021
- 稿件说明：
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朱方方, 程金花, 王书韬, 等. 湖北低山丘陵区侵蚀泥沙颗粒特征及其与地形因子的关系[J]. 水土保持学报, 2021,35(4):27-33.

ZHU Fangfang, CHENG Jinhua, WANG Shutao, et al. Characteristics of Eroded Sediment Particles and Their Relationship with Topographical Factors in the Low Mountain and Hilly Area of Hubei Province[J]. 2021, 35(4): 27-33.
朱方方, 程金花, 王书韬, 等. 湖北低山丘陵区侵蚀泥沙颗粒特征及其与地形因子的关系[J]. 水土保持学报, 2021,35(4):27-33. DOI： 10.13870/j.cnki.stbcxb.2021.04.005.

ZHU Fangfang, CHENG Jinhua, WANG Shutao, et al. Characteristics of Eroded Sediment Particles and Their Relationship with Topographical Factors in the Low Mountain and Hilly Area of Hubei Province[J]. 2021, 35(4): 27-33. DOI： 10.13870/j.cnki.stbcxb.2021.04.005.

摘要

坡面地形变化是影响侵蚀泥沙颗粒特征的重要因素，深入理解地形因子与侵蚀泥沙颗粒粒径组成及分选特征的关系是研究坡面土壤侵蚀动力学的基础。采用野外降雨试验和粒径分析试验，结合ArcGIS系统识别和提取得到地形因子数据，研究低山丘陵地区侵蚀泥沙颗粒特征及其与地形因子的关系。结果表明：（1）在试验条件下，侵蚀泥沙中黏粒和粉粒总含量远高于砂粒，粗颗粒含量与坡度因子呈显著正相关关系（p<0.01），粗颗粒与洼地蓄积量呈显著负相关关系（p<0.05）。（2）试验样地平均质量直径MWD变化范围为0.031~0.164 mm，分形维数D的变化范围为2.021~2.778，MWD和D的决定因素是粗颗粒含量多少。从整体来看，雨强对泥沙颗粒分选特征参数影响显著，MWD随雨强的增大而增大，D随雨强的增大而减小，二者与坡度因子呈显著相关关系（p<0.05）。（3）回归分析表明，MWD、D与坡度因子、洼地蓄积量呈显著幂函数关系（R2>0.5），结合相关性研究结果，将坡度因子作为侵蚀泥沙粒径模型研究的优先选择。研究结果旨在揭示地形因子对坡面侵蚀泥沙颗粒的作用机理，为土壤侵蚀模型的构建提供科学参考。

Abstract

Slope topography changes are the important factors that affect the characteristics of eroded sediment particles. A deep understanding of the relationship between topographic factors and eroded sediment particle size composition and sorting characteristics is the basis for studying slope soil erosion dynamics. In this study

field rainfall experiments and particle size analysis experiments were used

combined with ArcGIS system identification and extraction to obtain topographic factor data

to study the characteristics of erosion and sediment particles in the low mountain and hilly areas and their relationship with topographic factors. The results showed that: (1) Under the test conditions

the total contents of clay and silt particles in the eroded sediment were much higher than that of sand particles. The content of coarse particles had a significant positive correlation with the slope factor (p<0.01)

and a significantly negative correlation (p<0.05) with the accumulation of depressions. (2) In this study

the average mass diameter (MWD) of the test plot varied from 0.031 to 0.164 mm

and the fractal dimension (D) varied from 2.021 to 2.778. The determining factor of the MWD and D size was the content of coarse particles. From an overall point of view

rain intensity had a significant impact on the sediment particle sorting characteristic parameters. MWD increased with the increase of rain intensities

and D decreased with the increase of rain intensities. The two have a significant correlation with the slope factor (p<0.05). (3) The regression results show that the MWD and D had the significant power function relationships with the slope factor and the accumulation of depressions (R2>0.5). Combining the results of the correlation study

the slope factor was suggested as the preferred choice for the study of erosion and sediment particle size models. This study aimed to reveal the effect mechanism of topographical factors on slope erosion and sediment particles

and provide a scientific reference for the construction of soil erosion models.

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