“…Several manufacturers have developed self-cleaning sensors with low power requirements that are purported to allow for long-term in situ deployments. A number of researchers have assessed the use of continuous, instream turbidity as a surrogate for total suspended solids (TSS) and/or suspended sediment concentration (SSC) (Gippel, 1989;Lewis, 1996;Packman et al, 1999;Christensen, 2001;Dana et al, 2004;Jastram et al, 2007;Stubblefield et al, 2007;Jastrum et al, 2010;Jones et al, 2010;Williamson and Crawford, 2011), total phosphorus (TP) (Stubblefield et al, 2007;Jones et al, 2010), fecal coliforms (Christensen et al, 2000), and total mercury (Balogh, 1997;Ruzycki et al, 2011). Christensen (2001) used instream measures of specific electrical conductivity (EC at 25°C), pH, temperature, turbidity, and dissolved oxygen to estimate total dissolved solids, sodium, chloride, fecal coliforms, as well as suspended sediment.…”