globalchange  > 科学计划与规划
DOI: 10.1002/2015GL064155
论文题名:
Fractal patterns in riverbed morphology produce fractal scaling of water storage times
作者: Aubeneau A.F.; Martin R.L.; Bolster D.; Schumer R.; Jerolmack D.; Packman A.
刊名: Geophysical Research Letters
ISSN: 0094-9431
EISSN: 1944-9162
出版年: 2015
卷: 42, 期:13
起始页码: 5309
结束页码: 5315
语种: 英语
英文关键词: surface-groundwater interaction
Scopus关键词: Fractals ; Groundwater ; Morphology ; River pollution ; Rivers ; Sand ; Solute transport ; Stream flow ; Surface topography ; Topography ; Travel time ; Water resources ; Anomalous transport ; Contaminant transport ; Fractal properties ; High resolution observations ; Hyporheic exchange ; Surface-groundwater interaction ; Surface-subsurface interactions ; Topography controls ; Residence time distribution ; bedform ; groundwater-surface water interaction ; hyporheic zone ; pollutant transport ; porewater ; residence time ; river bed ; solute transport ; stream bed ; topography ; travel time ; water storage
英文摘要: River topography is famously fractal, and the fractality of the sediment bed surface can produce scaling in solute residence time distributions. Empirical evidence showing the relationship between fractal bed topography and scaling of hyporheic travel times is still lacking. We performed experiments to make high-resolution observations of streambed topography and solute transport over naturally formed sand bedforms in a large laboratory flume. We analyzed the results using both numerical and theoretical models. We found that fractal properties of the bed topography do indeed affect solute residence time distributions. Overall, our experimental, numerical, and theoretical results provide evidence for a coupling between the sand-bed topography and the anomalous transport scaling in rivers. Larger bedforms induced greater hyporheic exchange and faster pore water turnover relative to smaller bedforms, suggesting that the structure of legacy morphology may be more important to solute and contaminant transport in streams and rivers than previously recognized. Key Points The fractality of sand-bed morphology and residence times are related Legacy topography controls surface-subsurface interactions in sand-bed streams Our results show that fractal patterns in space and time are linked. © 2015. American Geophysical Union. All Rights Reserved.
URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84938151614&doi=10.1002%2f2015GL064155&partnerID=40&md5=a43fd39484c44f664186954784f4491b
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/9046
Appears in Collections:科学计划与规划
气候变化与战略

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作者单位: Department of Civil and Environmental Engineering, University of Notre Dame, Notre Dame, IN, United States

Recommended Citation:
Aubeneau A.F.,Martin R.L.,Bolster D.,et al. Fractal patterns in riverbed morphology produce fractal scaling of water storage times[J]. Geophysical Research Letters,2015-01-01,42(13).
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