Journal
WATER RESOURCES RESEARCH
Volume 54, Issue 9, Pages 5883-5889Publisher
AMER GEOPHYSICAL UNION
DOI: 10.1029/2018WR023078
Keywords
streams; turbulence; nutrients; hyporheic; biogeochemistry; sediment
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Funding
- U.S. NSF Partnerships for International Research and Education [OISE-1243543]
- UC Office of the President Multi-campus Research Program Initiative award [MRP-17-455083]
- USGS River Corridor Powell Center
- U.S. Department of Energy (DOE), Office of Biological and Environmental Research (BER), as part of BER's Subsurface Biogeochemistry Research Program (SBR)
- Australian Research Council [DP120102500]
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New experimental techniques are allowing, for the first time, direct visualization of mass and momentum transport across the sediment-water interface in streams. These experimental insights are catalyzing a renaissance in our understanding of the role stream turbulence plays in a host of critical ecosystem services, including nutrient cycling. In this commentary, we briefly review the nature of stream turbulence and its role in hyporheic exchange and nutrient cycling in streams. A simple process-based model, borrowed from biochemical engineering, provides the link between empirical relationships for grain-scale turbulent mixing and nutrient processing at reach, catchment, continental, and global scales.
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