Estimation of suspended-sediment concentration from total suspended solids and turbidity data for Kentucky, 1978-1995

Journal of the American Water Resources Association
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Abstract

Suspended sediment is a constituent of water quality that is monitored because of concerns about accelerated erosion, nonpoint contamination of water resources, and degradation of aquatic environments. In order to quantify the relationship among different sediment parameters for Kentucky streams, long-term records were obtained from the National Water Information System of the U.S. Geological Survey. Suspended-sediment concentration (SSC), the parameter traditionally measured and reported by the U.S. Geological Survey, was statistically compared to turbidity and total suspended solids (TSS), two parameters that are considered surrogate data. A linear regression of log-transformed observations was used to estimate SSC from TSS; 72% of TSS observations were less than coincident SSC observations; however, the estimated SSC values were almost as likely to be overestimated as underestimated. The SSC-turbidity relationship also used log-transformed observations, but required a nonlinear, breakpoint regression that separated turbidity observations ???6nephelometric turbidity units. The slope for these low turbidity values was not significantly different than zero, indicating that low turbidity observations provide no real information about SSC; in the case of the Kentucky sediment record, this accounts for 30% of the turbidity observations. ?? 2011 American Water Resources Association. This article is a U.S. Government work and is in the public domain in the USA.

Additional publication details

Publication type Article
Publication Subtype Journal Article
Title Estimation of suspended-sediment concentration from total suspended solids and turbidity data for Kentucky, 1978-1995
Series title Journal of the American Water Resources Association
DOI 10.1111/j.1752-1688.2011.00538.x
Volume 47
Issue 4
Year Published 2011
Language English
Publisher American Water Resources Association
Description 11 p.
First page 739
Last page 749
Online Only (Y/N) N
Additional Online Files (Y/N) N