Effect of reservoir construction on suspended sediment load in a large river system: thresholds and complex response
文献类型：SCI/SSCI论文
| 作者 | Xu J. X. ; Yan Y. X. |
| 发表日期 | 2010 |
| 关键词 | reservoir sediment transport threshold complex response upper Changjiang River channel adjustment downstream upper yangtze flow regulation china yield dams |
| 英文摘要 | Dam construction greatly alters the channel boundary of rivers, making the dammed river system a human-controlled system. Based on hydrometric data in the upper Changjiang River basin, the change in behaviour of sediment transport of some dammed rivers was studied. As a result, some phenomena of threshold and complex response were found. When the coefficient (C(r,a)) of actual runoff regulation by reservoirs, defined as the ratio of total capacity of reservoirs to annual runoff input, is smaller than 10%, suspended sediment load at Yichang station, the control station of the Changjiang River, shows a mild decreasing trend. When this coefficient becomes larger than 10%, suspended sediment load decreases sharply. The coefficient of 10% can be regarded as a threshold. The C(r,a) of 10% is also a threshold, when the variation of suspended sediment concentration (SSC) with C(r,a) at Yichang station is considered. The impacts of reservoir construction can be divided into several stages, including road construction, dam building and closure, water storage and sediment trapping. During these stages, some complex response was identified. At the station below the dam, SSC increases and reaches a maximum, and then declines sharply. This phenomenon was found on the main-stem and several major tributaries of the upper Changjiang River. In the Minjiang River, where a series of dams were built successively, the response of SSC is more complicated. Copyright (C) 2010 John Wiley & Sons, Ltd. |
| 出处 | Earth Surface Processes and Landforms |
| 卷 | 35 |
| 期 | 14 |
| 页 | 1666-1673 |
| 收录类别 | SCI |
| 语种 | 英语 |
| ISSN号 | 0197-9337 |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/22670]  |
| 专题 | 地理科学与资源研究所_历年回溯文献 |
| 推荐引用方式 GB/T 7714 | Xu J. X.,Yan Y. X.. Effect of reservoir construction on suspended sediment load in a large river system: thresholds and complex response. 2010. |
入库方式： OAI收割
来源：地理科学与资源研究所
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