Analysis of controls upon channel planform at the First Great Bend of the Upper Yellow River, Qinghai-Tibet Plateau
文献类型：SCI/SSCI论文
| 作者 | Du J. |
| 发表日期 | 2013 |
| 关键词 | Yellow River Source river pattern diversity river pattern transition anastomosing river anabranching river meandering river braided river patterns classification continuum basin china |
| 英文摘要 | The 270 km long section of the Upper Yellow River at the First Great Bend is comprised of single channel and multiple channel systems that alternate among anastomosing, anabranching, meandering and braided reaches. The sequence of downstream pattern changes is characterized as: anastomosing-anabranching, anabranching-meandering, meandering-braided and braided-meandering. Remote sensing images, DEM data and field investigations are used to assess and interpret controls on these reach transitions. Channel slope and bed sediment size are key determinants of transitions in channel planform. Anastomosing reaches have a relatively high bed slope (0.86aEuro degrees) and coarser sediment bed material (d (50) = 3.5 mm). In contrast, meandering reaches have a low slope (0.30aEuro degrees) and fine sediment bed material (d (50) = 0.036 mm). The transition from a meandering to braided pattern is characterized by an increase in channel width-depth ratio, indicating the important role of bank strength (i.e. cohesive versus non-cohesive versus channel boundaries). Interestingly, the braided-meandering and meandering-braided transitions are coincident with variable flow inputs from tributary rivers (Baihe and Heihe rivers respectively). Theoretical analysis of the meandering-braided transition highlights the key control of channel width-depth ratio as a determinant of channel planform. |
| 出处 | Journal of Geographical Sciences |
| 卷 | 23 |
| 期 | 5 |
| 页 | 833-848 |
| 收录类别 | SCI |
| 语种 | 英语 |
| ISSN号 | 1009-637X |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/30422]  |
| 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 | Du J.. Analysis of controls upon channel planform at the First Great Bend of the Upper Yellow River, Qinghai-Tibet Plateau. 2013. |
入库方式： OAI收割
来源：地理科学与资源研究所
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