Particle Characteristics and Influencing Factors of Eroded Purple Soil

PENG Yi; WANG Yu-kuan; FU Bin; Xu Pei; WANG Dao-jie

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Particle Characteristics and Influencing Factors of Eroded Purple Soil

- Particle Characteristics and Influencing Factors of Eroded Purple Soil
- Bulletin of Soiland Water Conservation Vol. 29, Issue 2, Pages: 142-144(2010)
- 作者机构：
  
  1. 中国科学院水利部成都山地灾害与环境研究所,四川,成都,610041
  2. 中国科学院研究生院,北京,100049
  3. 中国科学院山地灾害与地表过程重点实验室,四川,成都,610041
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Published：2010
- 稿件说明：
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PENG Yi, WANG Yu-kuan, FU Bin, et al. Particle Characteristics and Influencing Factors of Eroded Purple Soil[J]. Bulletin of Soiland Water Conservation, 2010, 29(2): 142-144.
DOI：

PENG Yi, WANG Yu-kuan, FU Bin, et al. Particle Characteristics and Influencing Factors of Eroded Purple Soil[J]. Bulletin of Soiland Water Conservation, 2010, 29(2): 142-144. DOI：

摘要

土壤可蚀性是影响坡面水蚀过程的内在因素，与土壤质地，土壤有机质等理化性质密切相关。本研究利用田间人工模拟降雨观测资料，分析了侵蚀过程中流失土壤颗粒组成的变化。结果表明:(1)在次降雨过程中，流失土壤颗粒组成不断变化。随着降雨的进行，细砂含量逐步增加，而粉粒含量基本不变，黏粒含量逐渐减小;(2)雨强是影响流失土壤颗粒组成的重要因素。随雨强增加，细砂含量呈逐步增大的趋势，而粉粒与黏粒含量均逐步下降;(3)坡度对流失土壤颗粒组成影响比较复杂。随坡度增加，细砂含量先增大后减小，粉粒与黏粒含量先减小后增大;在20°坡度时，细砂含量最大，粉粒与黏粒含量最小。

Abstract

Soil erodibility is the intrinsic factor which has effect on water erosion on slope and is related to soil texture

soil organic matter

and other soil properties. Sediment particle is analyzed by using plot data from rainfall simulation experiments. Results show that (1) during rainfall

particle composition of sediment changes with time. Sand content increases

silt content keeps constant

and clay content decreases. (2) Rainfall intensity is the important factor to the particle composition of sediment. With rain intensity increasing

sand content increases and slit and clay contents are reduced. (3) The effect of slope gradient on sediment is complicated. When slope becomes steeper

sand content increases first and then decreases

whereas silt and clay contents decrease first and then increase. When slope gradient is 20°

sand content reaches the maximum and slit and clay contents

the minimum.

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Related Institution

Institute of Mountain Hazards and Environment, Chinese Academy of Sciences

Key Laboratory of Mountain Hazards and Earth Surface Process, Chinese Academy of Sciences

College of Environmental Science and Engineering， China West Normal University， Nanchong

Northwestuniversity of Agriculture and Forestry, Yangling District

Institute of Soil and Water Conservation, Chinese Academy of Sciences and Ministry of Water Resources, Yangling District 712100, Shaan xi Province

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