Journal
SCIENCE ADVANCES
Volume 3, Issue 5, Pages -Publisher
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/sciadv.1603114
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Funding
- NSF [1427262]
- National Natural Science Foundation of China (NSFC) [51525901, 5153000441]
- NSF Graduate Research Fellowship [145068]
- Directorate For Geosciences
- Division Of Earth Sciences [1427380] Funding Source: National Science Foundation
- Division Of Earth Sciences
- Directorate For Geosciences [1427177, 1427262] Funding Source: National Science Foundation
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Sedimentary dispersal systems with fine-grained beds are common, yet the physics of sediment movement within them remains poorly constrained. We analyze sediment transport data for the best-documented, fine-grained river worldwide, the Huanghe (Yellow River) of China, where sediment flux is underpredicted by an order of magnitude according to well-accepted sediment transport relations. Our theoretical framework, bolstered by field observations, demonstrates that the Huanghe tends toward upper-stage plane bed, yielding minimal form drag, thus markedly enhancing sediment transport efficiency. We present a sediment transport formulation applicable to all river systems with silt to coarse-sand beds. This formulation demonstrates a remarkably sensitive dependence on grain size within a certain narrow range and therefore has special relevance to silt-sand fluvial systems, particularly those affected by dams.
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