Why some alluvial rivers develop an anabranching pattern
文献类型：期刊论文
| 作者 | Huang H. Q.; Nanson G. C. |
| 刊名 | Water Resources Research
 |
| 出版日期 | 2007 |
| 卷号 | 43期号:7页码:W07441 |
| 关键词 | Arid Central Australia Maximum Flow Efficiency Channel-pattern Hydraulic Geometry Northern Plains British-columbia Bank Stability Least Action Vegetation Behavior |
| ISSN号 | 0043-1397 |
| 英文摘要 | [1] Anabranching rivers have been identified globally, but a widely accepted and convincing theoretical explanation for their occurrence has remained elusive. Using basic flow and sediment transport relations, this study analyzes the mechanisms whereby self-adjusting alluvial channels can anabranch to alter their flow efficiency ( sediment transport capacity per unit of stream power). It shows that without adjusting channel slope, an increase in the number of channels can produce a proportional decrease in flow efficiency, a finding particularly relevant to understanding energy consumption in some braided rivers. However, anabranching efficiency can be significantly increased by a reduction in channel width, as occurs when vegetated alluvial islands or between-channel ridges form. The counteracting effects of width reduction and an increasing number of channels can cause, with no adjustment to slope, an otherwise unstable system (underloaded or overloaded) to achieve stability. As with other river patterns, anabranching can be characterized by stable equilibrium or accreting disequilibrium examples. |
| 语种 | 英语 |
| 公开日期 | 2012-06-08 |
| 源URL | [http://159.226.115.200/handle/311030/23831]  |
| 专题 | 陆地水循环及地表过程院重点实验室_外文论文 |
| 推荐引用方式 GB/T 7714 | Huang H. Q.,Nanson G. C.. Why some alluvial rivers develop an anabranching pattern[J]. Water Resources Research,2007,43(7):W07441. |
| APA | Huang H. Q.,&Nanson G. C..(2007).Why some alluvial rivers develop an anabranching pattern.Water Resources Research,43(7),W07441. |
| MLA | Huang H. Q.,et al."Why some alluvial rivers develop an anabranching pattern".Water Resources Research 43.7(2007):W07441. |
入库方式： OAI收割
来源：地理科学与资源研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。