ISWC OpenIR  > 水保所知识产出(1956---)
雨强对工程堆积体侵蚀规律和细沟发育的影响
戎玉博1; 骆汉1,2; 谢永生1,2; 王爱娟3
2016
Source Publication泥沙研究
Volume2016Issue:12Pages:12-18
Abstract

以陕西杨凌周边开发建设项目弃土堆积体表层土壤为试验材料,模拟野外最常见的散乱锥状堆积体的
形成过程和堆置形态。在室内模拟降雨的条件下,设计了七组降雨强度( 1. 0、1. 25、1. 5、1. 75、2. 0、2. 25、
2. 5mm/min) ,研究了雨强对物质组成为全土的锥状工程堆积体的产流产沙规律和细沟发育的影响。结果表
明: ①降雨强度对径流率和侵蚀速率的变化规律有着显著的影响,在不同的降雨条件下,径流率和侵蚀速率随
时间的变化规律不同; ②各雨强条件下,细沟长度、宽度和深度的变化趋势不同,其中细沟长度与侵蚀速率之
间存在着显著的正相关关系; ③在产流初期( 0 ~ 10 min) ,侵蚀速率随雨强的增大呈现出一条较为平缓的曲
线,产流时间> 10 min 后,侵蚀速率随雨强的增大呈现出指数增大的趋势; ④总侵蚀量与雨强之间存在着明显
的指数关系。

Other Abstract

Erosion of engineering piles is different from traditional slopes,owing to lacking organic matter, scatter
material composition and special form. However existing studies are mainly focused on the tradition slopes
or the short-slope piles, so that the erosion processes of the engineering deposits in the field can’t be studied
accurately. As a result, studying the erosion processes of three-dimensional engineering piles with the same degree
with that in the field is necessary. In this paper, in order to simulate the engineering piles,a self-made
platform was used to pile the soil which is selected from the Yangling District in Shanxi Province. The rain simulation
experiments were conducted in the laboratory with seven kinds of rainfall intensities ( 1. 0,1. 25,1. 5,
1. 75,2. 0,2. 25,2. 5mm/min) . Variations in erosion were studied experimentally, including volume of runoff,
rate of erosion,and characteristics of the rill. Results show that both the rainfall intensity and the rill have significant
impacts on the volume of runoff and the rate of erosion. The tendency of runoff and erosion is different
from the rainfall intensity; The length,width and depth of rills show different tendency in each rainfall test. The
length of rill which has obvious relevance to the rate of erosion can represent the process of rill well. In the initial
runoff ( 1 ~ 10min) , the rainfall intensity has a small influence on the rate of erosion. As the increase of
rainfall intensity, the erosion rate shows a relatively smooth curve. When the runoff time is more than 10 minutes,
the erosion rate is affected by the rainfall intensity significantly,and the erosion rate shows an exponential
increasing trend with the increase of rainfall intensity. There is an obvious exponential relationship between
the total amount of erosion and the rainfall intensity according to the experimental data.

Keyword侵蚀速率 降雨强度 径流 细沟 工程堆积体
Indexed By中文核心期刊要目总览
Language中文
Document Type期刊论文
Identifierhttp://ir.iswc.ac.cn/handle/361005/8703
Collection水保所知识产出(1956---)
Affiliation1.西北农林科技大学水土保持研究所
2.中国科学院- 水利部水土保持研究所
3.水利部水土保持监测中心
Recommended Citation
GB/T 7714
戎玉博,骆汉,谢永生,等. 雨强对工程堆积体侵蚀规律和细沟发育的影响[J]. 泥沙研究,2016,2016(12):12-18.
APA 戎玉博,骆汉,谢永生,&王爱娟.(2016).雨强对工程堆积体侵蚀规律和细沟发育的影响.泥沙研究,2016(12),12-18.
MLA 戎玉博,et al."雨强对工程堆积体侵蚀规律和细沟发育的影响".泥沙研究 2016.12(2016):12-18.
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