Channel change at Toudaoguai Station and its responses to the operation of upstream reservoirs in the upper Yellow River
文献类型：SCI/SSCI论文
| 作者 | Ran L. S. ; Wang S. J. ; Fan X. L. |
| 发表日期 | 2010 |
| 关键词 | cross-sectional profile median diameter reservoir Toudaoguai cross-section the upper Yellow River sediment load downstream dams impacts example basin texas flow |
| 英文摘要 | The application of dams built upstream will change the input conditions, including water and sediment, of downstream fluvial system, and destroy previous dynamic quasi-equilibrium reached by channel streamflow, so indispensable adjustments are necessary for downstream channel to adapt to the new water and sediment supply, leading the fluvial system to restore its previous equilibrium or reach a new equilibrium. Using about 50-year-long hydrological, sedimentary and cross-sectional data, temporal response processes of Toudaoguai cross-section located in the upper Yellow River to the operation of reservoirs built upstream are analyzed. The results show that the Toudaoguai cross-section change was influenced strongly by upstream reservoir operation and downstream channel bed armoring thereafter occurred gradually and extended to the reach below Sanhuhekou gauging station. Besides, median diameter of suspended sediment load experienced a three-stage change that is characterized by an increase at first, then a decrease and an increase again finally, which reflects the process of channel bed armoring that began at Qingtongxia reservoir and then gradually developed downstream to the reach below Sanhuhekou cross-section. Since the joint operation strategy of Longyangxia, Liujiaxia and Qingtongxia reservoirs was introduced in 1986, the three-stage change trend has become less evident than that in the time period between 1969 and 1986 when only Qingtongxia and Liupaxia reservoirs were put into operation alone. In addition, since 1987, the extent of lateral migration and thalweg elevation change at Toudaoguai cross-section has reduced dramatically, cross-sectional profile and location tended to be stable, which is beneficial to the normal living for local people. |
| 出处 | Journal of Geographical Sciences |
| 卷 | 20 |
| 期 | 2 |
| 页 | 231-247 |
| 收录类别 | SCI |
| 语种 | 英语 |
| ISSN号 | 1009-637X |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/23158]  |
| 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 | Ran L. S.,Wang S. J.,Fan X. L.. Channel change at Toudaoguai Station and its responses to the operation of upstream reservoirs in the upper Yellow River. 2010. |
入库方式： OAI收割
来源：地理科学与资源研究所
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