| 来沙条件对山区河流推移质输沙的影响 |
| |
| 引用本文： | 余国安,王兆印,杨吉山,张康.来沙条件对山区河流推移质输沙的影响[J].清华大学学报(自然科学版),2009(3). |
| |
| 作者姓名： | 余国安 王兆印 杨吉山 张康 |
| |
| 作者单位： | 清华大学水利水电工程系水沙科学与水利水电工程国家重点实验室; |
| |
| 基金项目： | 国家“九七三”重点基础研究项目(2003CB415206) |
| |
| 摘 要： | 为研究山区河流推移质输沙规律,在西南山区吊嘎河进行推移质运动野外观测和人工加沙试验。观测发现,推移质输沙与水流条件并不存在一个特定的关系,山区河流推移质输沙明显受到来沙量、来沙强度、级配等条件的影响。在同样的水流条件下,推移质输沙率在汛前和第一次洪水后可能相差数百到上千倍,推移质输沙率-水流强度关系呈顺时针"绳套型"。试验表明,粒径较小的推移质颗粒(D<20mm)运动主要决定于来沙条件,而粗颗粒泥沙的运动则主要依赖于水流条件。
|
| 关 键 词： | 山区河流 推移质输沙 来沙条件 水流条件 |
Effects of incoming sediment on bed load transport in mountain streams |
| |
| YU Guoan,WANG Zhaoyin,YANG Jishan,ZHANG Kang.Effects of incoming sediment on bed load transport in mountain streams[J].Journal of Tsinghua University(Science and Technology),2009(3). |
| |
| Authors: | YU Guoan WANG Zhaoyin YANG Jishan ZHANG Kang |
| |
| Institution: | State Key Laboratory of Hydroscience and Engineering;Departmemt of Hydraulic Engineering;Tsinghua University;Beijing 100084;China |
| |
| Abstract: | Field observations and experiments were conducted in the Diaoga River,a mountain stream in Southern China,to study the laws of bed load transport.The results show that there is no single relationship between the bed load transport and flow conditions,but that the bed load transport rate is greatly affected by the incoming sediment load.For the same flow conditions,the bed load discharge may be thousands of times less after the first flood of the year than before and that the bed load discharge versus stream... |
| |
| Keywords: | mountain stream bed load transport incoming sediment condition flow intensity |
| 本文献已被 CNKI 等数据库收录！ |
