Hydrology and Earth System Sciences
Hydrology and Earth System Sciences
HESS
Articles | Volume 24, issue 2
Articles | Volume 24, issue 2
https://doi.org/10.5194/hess-24-991-2020
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/hess-24-991-2020
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 24, issue 2
Research article
 | Highlight paper
 | 
03 Mar 2020
Research article | Highlight paper |  | 03 Mar 2020

Changing suspended sediment in United States rivers and streams: linking sediment trends to changes in land use/cover, hydrology and climate

Jennifer C. Murphy

Supplement

https://doi.org/10.5194/hess-24-991-2020-supplement

Data sets

Water-quality and streamflow datasets used in the Weighted Regressions on Time, Discharge, and Season (WRTDS) models to determine trends in the Nation’s rivers and streams, 1972-2012 L. A. De Cicco, L. A. Sprague, J. C. Murphy, M. L. Riskin, J. A. Falcone, E. G. Stets, G. P. Oelsner, and H. M. Johnson https://doi.org/10.5066/F7KW5D4H

Water-quality trends and trend component estimates for the Nation's rivers and streams using Weighted Regressions on Time, Discharge, and Season (WRTDS) models and generalized flow normalization, 1972-2012 J. C. Murphy, W. H. Farmer, L. A. Sprague, L. A. De Cicco, and R. M. Hirsch https://doi.org/10.5066/F7TQ5ZS3

Watershed characteristics for study sites of the Surface Water Trends project, National Water Quality Program J. A. Falcone https://doi.org/10.5066/F7TX3CKP

Daily streamflow datasets used to analyze trends in streamflow at sites also analyzed for trends in water quality and ecological condition in the Nation's rivers and streams W. H. Farmer, J. C. Murphy, M. L. Riskin, K. R. Ryberg, and R. E. Zuellig https://doi.org/10.5066/F7D798JN

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Short summary
Between 1992 and 2012, concentrations of suspended sediment decreased at about 60 % of 137 US stream sites, with increases at only 17 % of sites. Sediment trends were primarily attributed to changes in land management, but streamflow changes also contributed to these trends at > 50 % of sites. At many sites, decreases in sediment occurred despite small-to-moderate increases in the amount of anthropogenic land use, suggesting sediment reduction activities across the US may be seeing some success.
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