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| 黄土高原坡沟系统径流泥沙过程 | |
| 引用本文： | 魏霞,李勋贵,李占斌.黄土高原坡沟系统径流泥沙过程[J].兰州大学学报(自然科学版),2010,46(5). |
| 作者姓名： | 魏霞 李勋贵 李占斌 |
| 作者单位： | 1. 兰州大学,资源环境学院,兰州,730000;中国科学院,寒区旱区环境与工程研究所,兰州,730000 2. 兰州大学,资源环境学院,兰州,730000 3. 西安理工大学,水利水电学院,西安,710048 |
| 基金项目： | 国家自然科学基金项目，教育部博士点基金项目，中央高校基本科研业务费专项资金项目 |
| 摘 要： | 利用概化的坡沟系统模型,采用室内放水冲刷试验,对黄土高原坡沟系统径流侵蚀产沙过程进行模拟研究。结果表明:坡沟系统的产流产沙速率随流量的增大而增大;产流量随放水量的增大呈明显的指数函数变化趋势,且增长率有增大趋势;产沙量随冲刷流量的增大呈幂函数增大趋势,增长率却逐渐减小;冲刷流量相同时,产沙速率随冲刷历时呈现出波动式的双峰增长趋势;在实验流量和时间范围内,坡沟系统的累积产沙量随累积径流量呈现出非常显著的二次函数关系. |
| 关 键 词： | 坡沟系统 侵蚀产沙 累积径流量 累积产沙量 黄土高原 |
Sediment yield process in the slope-gully system on the loess plateau |
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| WEI Xia,LI Xun-gui,LI Zhan-bin.Sediment yield process in the slope-gully system on the loess plateau[J].Journal of Lanzhou University(Natural Science),2010,46(5). | |
| Authors: | WEI Xia LI Xun-gui LI Zhan-bin |
| Institution: | WEI Xia~(1,2),LI Xun-gui~1,LI Zhan-bin~3 (1.School of Resources and Environmental Sciences,Lanzhou University,Lanzhou 730000,China,2.Cold and Arid Regions Environmental and Engineering Research Institute,Chinese Academy of Sciences,3.Institute of Water Resources and Hydro-Electric Engineering,Xi'an University of Technology,Xi'an 710048,China) |
| Abstract: | Sediment yield process of the slope-gully system on the loess plateau was studied experimentally in flume by using a physical model for the slope-gully system and the runoff scouring method.It was found that the speed of runoff and sediment generation of the slope-gully system was rising with the increase in the scouring flow.The relation between the runoff yield and scouring flow was established as the exponential function,and the rate of increment increased gradually.Sediment yield increased as the power ... |
| Keywords: | slope-gully system sediment yield accumulation runoff accumulation sediment yield loess plateau |
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