Aggregate Loss Characteristics on Red Soil Slope Under the Combination of Rainfall Simulator and Scouring Flow

doi:10.13870/j.cnki.stbcxb.2017.04.023

您当前的位置：

首页 >

文章列表页 >

Aggregate Loss Characteristics on Red Soil Slope Under the Combination of Rainfall Simulator and Scouring Flow

更新时间：2025-03-12

- Aggregate Loss Characteristics on Red Soil Slope Under the Combination of Rainfall Simulator and Scouring Flow
- Vol. 31, Issue 4, Pages: 141-147(2017)
- 作者机构：
  
  华中农业大学水土保持研究中心,武汉,430070
- 作者简介：
- 基金信息：
- DOI：10.13870/j.cnki.stbcxb.2017.04.023
  CLC： S157.1
- Published：2017
- 稿件说明：
移动端阅览
Aggregate Loss Characteristics on Red Soil Slope Under the Combination of Rainfall Simulator and Scouring Flow[J]. 2017, 31(4): 141-147.
DOI：

Aggregate Loss Characteristics on Red Soil Slope Under the Combination of Rainfall Simulator and Scouring Flow[J]. 2017, 31(4): 141-147. DOI： 10.13870/j.cnki.stbcxb.2017.04.023.

摘要

以第四纪红粘土发育红壤为研究对象，通过室内模拟降雨和放水冲刷组合试验，研究了不同降雨强度（0，60，90，120 mm/h）和放水流量（5，7.5 L/min）下红壤坡面团聚体流失特征，分析了团聚体平均重量直径（MWD）、几何平均直径（GDM）、分形维数（D）和平均重量比表面积（MWSSA）的变化特征。结果表明：侵蚀泥沙中＜0.05 mm微团聚体初始含量在19％～58％之间，随产流时间的延长先降低后趋于稳定；＞0.25 mm大团聚体含量最高，随产流时间的延长先升高后趋于稳定。相同降雨强度下，当放水流量由5 L/min增大到7.5 L/min时，团聚体MWD和GMD有所增大，D和MWSSA有所减小。无降雨时，泥沙中团聚体的MWD和GMD低于有降雨时的MWD和GMD，而D和MWSSA高于有降雨时的D和MWSSA。相同放水流量下，随着降雨强度增强，团聚体的MWD和GMD呈增大趋势，D和MWSSA呈减小趋势。

Abstract

To understand the characteristics of erosive aggregate loss in tropical and subtropical zones

a combination experiment of two discharge flow (5 L/min and 7.5 L/min) and four simulated rainfall intensities (0 mm/h

60 mm/h

90 mm/h

120 mm/h) was conducted. The variation characteristics of aggregates

such as mean weight diameter (MWD)

geometric mean diameter (GMD)

fractal dimension (D)

mean weight soil specific area (MWSSA)

were analyzed. The results showed that: the aggregates of ＜0.05 mm occupied 19％～58％ of the total sediment during the early phase of the event

and the tendency declined first then stabilized with rainfall duration. The content of ＞0.25 mm aggregates in erosive sediment was highest

and the tendency increased first and stabilized later

with the rainfall duration

. When the discharge flow increased from 5 L/min to 7.5 L/min under the same rainfall intensity

MWD and GMD of aggregates increased

while D and MWSSA decreased. MWD and GMD of aggregates in the sediments without rainfall were lower than that in the rainfall; however

D and MWSSA of aggregates in the sediments without rainfall were higher than those with rainfall. Under the condition of the same rainfall

MWD and GMD increased as rainfall intensity increased

while D and MWSSA decreased.

关键词

Keywords

references

Views

1130

下载量

CSCD

Alert me when the article has been cited

提交

Tools

Publicity Resources

Influence and Mechanisms of Vegetation Restoration on Soil Detachment Capacity in Red Soil Hilly Regions

Influence of Soil Physical Properties on Preferential Flow in Kongqingshan Forested Lands，Jiangsu Province

Effects of Drought Stress and Fly Ash on Fractal Dimension and Fertility of Aeolian Sandy Soil

Rainfall Erosion Characteristics of Young Citrus Orchards on Calcareous Soil and Red Soil Slopes in Karst Areas of Northwest Guangxi

Soil Erosion Process Under the Combined Action of Water and Gravity on Red Soil Slope

Related Author

WU Jieling

ZHOU Qin

LIN Qiang

ZHOU Shiqi

XI Jie

HUANG Shaoyan

ZHA Xuan

ZHANG Wenqi

Related Institution

Key Laboratory of Humid Subtropical Eco-Geographical Process of Ministry-of Education

Fujian Experimental Station of Soil and Water Conservation

School of Geographical Sciences， Fujian Normal University

Jiangsu Provincial Key Laboratory of Soil Erosion and Ecological Restoration

Innovation Center for Sustainable Forestry in Southern China， Nanjing Forestry University

⁰