Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2019WR025126 |
Bedload Sediment Transport Regimes of Semi-alluvial Rivers Conditioned by Urbanization and Stormwater Management | |
Papangelakis, E.1; MacVicar, B.1; Ashmore, P.2 | |
2019-12-11 | |
发表期刊 | WATER RESOURCES RESEARCH |
ISSN | 0043-1397 |
EISSN | 1944-7973 |
出版年 | 2019 |
卷号 | 55期号:12页码:10565-10587 |
文章类型 | Article |
语种 | 英语 |
国家 | Canada |
英文摘要 | Watershed urbanization and stormwater management (SWM) alter the hydrologic processes of rivers. Although differences have been documented in channel morphology and sediment yield pre- and posturbanization, little is known about how the modified hydrology affects grain-scale bedload transport dynamics. This study aims to characterize the bedload sediment transport regime of three rivers with different hydrologic settings: rural, urban with no SWM, and urban with peak-shaving SWM. The rivers are "semi-alluvial," characterized by an alluvial layer over a cohesive till. Bedload transport was monitored using tracer stones over 3 years. Hydrograph characteristics of the streams fit with what is expected in urban and SWM systems, and the rural stream has an episodic transport regime typical of gravel-bed rivers. Entrainment thresholds are not detectably impacted by the semi-alluvial bed cover, but travel lengths of grains relative to their size are longer than in alluvial gravel-bed streams. Downstream displacement rates of particles up to the D-90 are accelerated in the urban river due to more frequent mobilization rather than increased event-based travel lengths and may explain channel enlargement. SWM decreases the mobility and travel lengths of particles below those in the rural system, which is combined with channel narrowing, and the loss of bed forms suggests a shift toward a competence-limited transport regime. This new regime is a result of reduced shear stresses that are insufficient to transport coarse material. This study presents empirical evidence of the effects of watershed urbanization and SWM on bedload transport and provides recommendations for process-based river management strategies. |
英文关键词 | bedload transport urbanization stormwater management tracers semi-alluvial sediment transport regime |
领域 | 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000501893400001 |
WOS关键词 | URBAN STREAM SYNDROME ; LARGE GRAINS MATTER ; GRAVEL-BED CHANNEL ; VIRTUAL VELOCITY ; INCIPIENT MOTION ; PATH-LENGTH ; LOW-RELIEF ; LAND-USE ; MORPHOLOGY ; FREQUENCY |
WOS类目 | Environmental Sciences ; Limnology ; Water Resources |
WOS研究方向 | Environmental Sciences & Ecology ; Marine & Freshwater Biology ; Water Resources |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/223973 |
专题 | 资源环境科学 |
作者单位 | 1.Univ Waterloo, Dept Civil & Environm Engn, Waterloo, ON, Canada; 2.Univ Western Ontario, Dept Geog, London, ON, Canada |
推荐引用方式 GB/T 7714 | Papangelakis, E.,MacVicar, B.,Ashmore, P.. Bedload Sediment Transport Regimes of Semi-alluvial Rivers Conditioned by Urbanization and Stormwater Management[J]. WATER RESOURCES RESEARCH,2019,55(12):10565-10587. |
APA | Papangelakis, E.,MacVicar, B.,&Ashmore, P..(2019).Bedload Sediment Transport Regimes of Semi-alluvial Rivers Conditioned by Urbanization and Stormwater Management.WATER RESOURCES RESEARCH,55(12),10565-10587. |
MLA | Papangelakis, E.,et al."Bedload Sediment Transport Regimes of Semi-alluvial Rivers Conditioned by Urbanization and Stormwater Management".WATER RESOURCES RESEARCH 55.12(2019):10565-10587. |
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