Suspended sediment in the St. Francis River at St. Francis, Arkansas, 1986-95

W. Reed Green; C. Shane Barks; Alan P. Hall

doi:10.3133/ofr99227

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Suspended sediment in the St. Francis River at St. Francis, Arkansas, 1986-95

W. Reed Green·C. Shane Barks·Alan P. Hall

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Abstract

Daily suspended-sediment concentrations were analyzed from the St. Francis River at St. Francis, Arkansas during 1986 through 1995. Suspended-sediment particle size distribution was measured in selected samples from 1978 through 1998. These data are used to assess changes in suspended-sediment concentrations and loads through time. Suspended-sediment concentrations were positively related to discharge. At higher flows, percent silt-clay was negatively related to discharge. Nonparametric trend analysis (Mann-Kendall test) of suspended-sediment concentration over the period of record indicated a slight decrease in concentration. Flow-adjusted residuals of suspended-sediment concentration also decreased slightly through the same period. No change was identified in annual suspended-sediment load or annual flow-weighted concentration. Continued monitorig of daily-suspended-sediment concentrations at this site and others, and similar data analysis at other sites where data are available will provide a better understanding of sediment transport withint the St. Francis River.

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W. Reed Green, C. Shane Barks, Alan P. Hall. 2000. Suspended sediment in the St. Francis River at St. Francis, Arkansas, 1986-95. https://doi.org/10.3133/ofr99227

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