Trajectories of river channel adjustments from nonequilibrium to equilibrium: Rate law evaluation using sand-bed flume data
文献类型：期刊论文
| 作者 | Bai, Yuwei1,2; Huang, He Qing1,2,3; Zhang, Min4; Xie, Zhehui5; Yu, Guoan1; Nanson, Gerald C.6 |
| 刊名 | EARTH SURFACE PROCESSES AND LANDFORMS
 |
| 出版日期 | 2025-12-01 |
| 卷号 | 50期号:15页码:e70220 |
| 关键词 | channel width hydrological regime change nondecaying trajectories rate law river channel adjustment sand-bed flume data |
| DOI | 10.1002/esp.70220 |
| 产权排序 | 1 |
| 文献子类 | Article |
| 英文摘要 | River systems are often in nonequilibrium because of changes in water and sediment inputs and channel-boundary conditions, but it remains unclear how the changes affect the trajectories of river channel-form adjustment from nonequilibrium to equilibrium. Using the data collected from a series of experiments conducted in sand-bed flumes and the generalized model of the rate law, this study presents a detailed investigation of the trajectories of channel-bed elevation adjustments from aggradation to equilibrium. For 15 runs of the experiments conducted respectively in the 2- and 4-m-wide sand-bed flumes at two flow discharges (30 and 60 Ls(-1)) and four sediment concentrations (5, 10, 20 and 30 kgm(-3)), the temporal variations of average channel-bed elevations at both inlet and outlet cross-sections in the 2-m-wide flume all take exponential decay trajectories and can reach equilibrium within a short period. In contrast, the temporal variations in the 4-m-wide flume take exponentially or linearly increasing trajectories in many runs, without a tendency of reaching equilibrium. Crucially, we found that under the combined influence of flow discharge, sediment concentration and channel width, the adjustment trajectories tend to shift from gradual increase to decay as the unit sediment transport rate increases. These trajectories arise from complex spatiotemporal interactions among flow conditions, sediment transport and channel-bed morphology. Further investigation is needed to identify the processes and conditions under which river channel-form adjustments evolve along nondecaying trajectories. |
| URL标识 | 查看原文 |
| WOS关键词 | YICHANG-CHENGLINGJI REACH ; MIDDLE YANGTZE-RIVER ; LOWER YELLOW-RIVER ; BANKFULL DISCHARGE ; MORPHOLOGICAL RESPONSE ; SEDIMENT TRANSPORT ; DELAYED-RESPONSE ; RIO-GRANDE ; LARGE DAMS ; EVOLUTION |
| WOS研究方向 | Physical Geography ; Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:001648130400029 |
| 出版者 | WILEY |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/219462]  |
| 专题 | 陆地水循环及地表过程院重点实验室_外文论文 |
| 通讯作者 | Huang, He Qing |
| 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, Beijing, Peoples R China; 3.China Univ Geosci, Sch Geog & Informat Engn, Hubei Key Lab Reg Ecol & Environm Change, Wuhan, Peoples R China; 4.Yellow River Inst Hydraul Res, Zhengzhou, Peoples R China; 5.Beijing Chenjinglun High Sch, Beijing, Peoples R China; 6.Univ Wollongong, Wollongong, NSW, Australia |
| 推荐引用方式 GB/T 7714 | Bai, Yuwei,Huang, He Qing,Zhang, Min,et al. Trajectories of river channel adjustments from nonequilibrium to equilibrium: Rate law evaluation using sand-bed flume data[J]. EARTH SURFACE PROCESSES AND LANDFORMS,2025,50(15):e70220. |
| APA | Bai, Yuwei,Huang, He Qing,Zhang, Min,Xie, Zhehui,Yu, Guoan,&Nanson, Gerald C..(2025).Trajectories of river channel adjustments from nonequilibrium to equilibrium: Rate law evaluation using sand-bed flume data.EARTH SURFACE PROCESSES AND LANDFORMS,50(15),e70220. |
| MLA | Bai, Yuwei,et al."Trajectories of river channel adjustments from nonequilibrium to equilibrium: Rate law evaluation using sand-bed flume data".EARTH SURFACE PROCESSES AND LANDFORMS 50.15(2025):e70220. |
入库方式： OAI收割
来源：地理科学与资源研究所
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