River Channel Forms in Relation to Bank Steepness: A Theoretical Investigation Using a Variational Analytical Method
文献类型：期刊论文
| 作者 | Fan, Jinsheng1,2; Huang, Heqing1,2; Yu, Guoan1; Su, Teng1 |
| 刊名 | WATER
 |
| 出版日期 | 2020-05-01 |
| 卷号 | 12期号:5页码:18 |
| 关键词 | alluvial rivers riverbank anti-scourability variational method equilibrium river channel forms |
| DOI | 10.3390/w12051250 |
| 通讯作者 | Huang, Heqing(huanghq@igsnrr.ac.cn) |
| 英文摘要 | Riverbanks vary considerably in anti-scourability and consequently take various profiles. By using an isosceles trapezoid as the generalized form of river channel cross-sections and then incorporating the effects of bank angle into the variational analytical approach developed by Huang and Nanson (2000), this study presents a detailed theoretical investigation of the self-adjustment of alluvial channel forms. It is demonstrated that when alluvial channel flow achieves stable equilibrium, a significant decrease in riverbank steepness leads to a slight decrease in maximum sediment (bedload) discharge, and yet results in a significant increase in optimal channel width and a considerable decrease in optimal channel depth. The hydraulic geometry relations, theoretically derived for bank steepness to vary across a wide range, show that among the multivariant controls, the roles of bed sediment size, channel roughness, flow discharge and sediment (bedload) discharge are independent of bank steepness. While the effects of bank steepness illustrated in the theoretically derived hydraulic geometry relations are highly consistent with the results of threshold theory and previous empirical studies, limitations on using bank angle to reflect the anti-scourability of natural riverbanks are also highlighted. |
| WOS关键词 | UNIT STREAM POWER ; GRAVEL-BED RIVERS ; MAXIMUM FLOW EFFICIENCY ; HYDRAULIC GEOMETRY ; EXTREMAL HYPOTHESES ; EQUILIBRIUM BANKS ; STRAIGHT RIVERS ; STABLE WIDTH ; MINIMUM RATE ; MOBILE BED |
| 资助项目 | National Key Research and Development Program of China[2016YFC0402502] ; National Natural Science Foundation of China[41561144012] ; National Natural Science Foundation of China[41661144030] ; National Natural Science Foundation of China[41971010] |
| WOS研究方向 | Water Resources |
| 语种 | 英语 |
| WOS记录号 | WOS:000555915200029 |
| 出版者 | MDPI |
| 资助机构 | National Key Research and Development Program of China ; National Natural Science Foundation of China |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/158146]  |
| 专题 | 中国科学院地理科学与资源研究所 |
| 通讯作者 | Huang, Heqing |
| 作者单位 | 1.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Water Cycle & Related Land Surface Proc, Beijing 100101, Peoples R China 2.Univ Chinese Acad Sci, Coll Resources & Enviroment, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Fan, Jinsheng,Huang, Heqing,Yu, Guoan,et al. River Channel Forms in Relation to Bank Steepness: A Theoretical Investigation Using a Variational Analytical Method[J]. WATER,2020,12(5):18. |
| APA | Fan, Jinsheng,Huang, Heqing,Yu, Guoan,&Su, Teng.(2020).River Channel Forms in Relation to Bank Steepness: A Theoretical Investigation Using a Variational Analytical Method.WATER,12(5),18. |
| MLA | Fan, Jinsheng,et al."River Channel Forms in Relation to Bank Steepness: A Theoretical Investigation Using a Variational Analytical Method".WATER 12.5(2020):18. |
入库方式： OAI收割
来源：地理科学与资源研究所
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