Spatiotemporal variability of suspended sediment particle size in a mixed-land-use watershed

The Science of the Total Environment
Elliott Kellner, Jason A Hubbart

Abstract

Given existing knowledge gaps, there is a need for research that quantitatively characterizes spatiotemporal variation of suspended sediment particle size distribution (PSD) in contemporary watersheds. A five-year study was conducted in a representative watershed of the central United States utilizing a nested-scale experimental watershed study design, comprising five gauging sites partitioning the catchment into five sub-watersheds. Streamwater grab samples were collected four times per week, at each gauging site, for the duration of the study period (Oct. 2009-Feb. 2014). Samples were analyzed using laser particle diffraction. Significantly different (p<0.05) suspended sediment PSDs were observed at monitoring sites throughout the course of the study. For example, results indicated greater proportions of silt at site #5 (65%), relative to other sites (41, 32, 29, and 43%, for sites #1-#4, respectively). Likewise, results showed greater proportions of sand at sites #2 and #3 (66 and 68%, respectively), relative to other sites (57, 55, and 34%, for sites #1, #4, and #5, respectively). PSD spatial variability was not fully explained by hydroclimate or sub-watershed land use/land cover characteristics. Rather, results were streng...Continue Reading

Citations

Dec 22, 2019·Environmental Science and Pollution Research International·Sabine KeßlerReinhard Bierl
Aug 26, 2018·The Science of the Total Environment·Elliott Kellner, Jason A Hubbart
Jan 25, 2020·Journal of Hazardous Materials·Chao WangTengfei Li

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