[1]曹颖,张光辉,唐科明,等.地表覆盖对坡面流流速影响的模拟试验[J].山地学报,2011,(06):654.
　CAO Ying,ZHANG Guanghui,et al.Experiment on the Effect of Simulated Surface Cover on the Overland Flow Velocity[J].Mountain Research,2011,(06):654.
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地表覆盖对坡面流流速影响的模拟试验()
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《山地学报》[ISSN:1008-2186/CN:51-1516]

卷:
期数:
2011年06期
页码:
654
栏目:
山地学报
出版日期:
2011-01-01

文章信息/Info

Title:
Experiment on the Effect of Simulated Surface Cover on the Overland Flow Velocity
作者:
曹颖;张光辉;唐科明;罗榕婷;
1.北京市地质研究所，北京 100120；
2.北京师范大学 地表过程与资源生态国家重点实验室，北京 100875
Author(s):
CAO Ying;  ZHANG Guanghui;  TANG Keming; LUO Rongting
1. Beijing Institute of Geology, Beijing 100120, China;
2. State Key Laboratory of Earth Surface Processes and Resource Ecology, Beijing Normal University, Beijing 100875, China
关键词:
坡面流; 流速; 模拟覆盖
Keywords:
overland flow;  velocity;  coverage rate
分类号:
S157.1
文献标志码:
A
摘要:
植被覆盖对坡面流流速的影响,会引起坡面输沙特征的改变,但在陡坡条件下盖度与流速的响应关系尚不明确。针对目前国内外研究的不足,本研究采用变坡实验水槽在较大坡度(5°～25°)、流量(0.25～2 L/s)和盖度(0%～25%)范围内,系统研究了坡面流平均流速与盖度、坡度、流量之间的关系。结果表明:坡面流流速在0.15～1.35 m/s内变化,流速与盖度、坡度和流量关系密切。随着地表模拟盖度的增加,水流克服覆盖物的阻碍作用而消耗的能量越多,水流流速随之减小。随着坡度和流量的增加,坡面流重力势能与水流动能增加,因此流速随坡度和流量呈幂函数增加。通过统计回归发现,盖度对流速的影响最大,占45%左右,坡...
Abstract:
The effect of vegetation cover on overland flow velocity can cause changes of characteristics of sediment discharge, but the relationship between coverage changes and the velocity is still unclear under steep slope conditions. Aiming at the shortage of research at home and abroad, this study discussed the relationships between average velocity and coverage rate, slope and discharge systematically on overland flow. Flow velocity was simulated in an experimental flume with varying slope in a large scale of slope gradient (5°~25°), flow discharge (025~2 L/s) and coverage rate (0%~25%). The result indicated that average velocity of overland flow changes from 015 L/s to 135 L/s. It is closely related to the coverage rate, slope and discharge. With the simulated surface coverage increasing, the water flow consumed more energy to overcome the resistance, so the flow velocity decreased along. With the increasing of slope and discharge, gravitational potential energy and kinetic energy of overland flow increased, and the average velocity increased by power function. The statistical regression showed that the dominating influential factor to velocity is coverage rate (45% more or less), and then slope and discharge. Three factors could be used to simulate the velocity of overland flow (R2=0.93). The research is helpful to have further understanding of the character of overland flow on steep slope with coverage by the way of dynamics, and provides theoretical basis of physical modeling of soil erosion.

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　YAN Dongchun,WEN Anbang,SHI Zhonglin,et al.Configuration Characteristic and Cause of Drop-Pit Development on Purple Slopeland[J].Mountain Research,2012,(06):30.
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[5]王协康,方铎,曹叔尤.山区流域坡面流的一种近似解[J].山地学报,1998,(04):8.

备注/Memo

备注/Memo:
收稿日期(Received date)：2011-08-25；改回日期(Accepted)：2011-10-25。
基金项目（Foundation item）：地表过程与资源生态国家重点实验室自主研究课题（2008-ZZ-04），北京师范大学自主科研
基金项目（2009SD-6）。［Supported by the project of State Key Laboratory of Earth Surface Processes and Resource Ecology (2008-ZZ-04), and the project of Beijing Normal University (2009SD-6).］
作者简介（Biography）：曹颖（1983-），女，河北秦皇岛人，博士，主要从事土壤侵蚀及其环境影响研究。［Cao Ying (1983-), female, was born in Qinhuangdao，Hebei province, doctor degree, mainly engaged in research of soil erosion and its environmental effect.］E-mail：cy_998@163.com
更新日期/Last Update: 1900-01-01