Kansas Real-Time Water Quality

Kansas Real-Time Water Quality

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USGS station:	Go to NWISWeb
Constituent:
Time period:
Model Form:

Funding to maintain the continuous water-quality monitor at this site ended on September 30, 2005.

Model Form #1

log₁₀(TRI) = 1.58 - 0.576 log₁₀(SC) - 0.254 cos(2π D / 365) - 0.0294 sin(2π D / 365)

where:

TRI is computed triazines, in micrograms per liter
SC is specific conductance at 25 degrees Celsius, in microsiemens per centimeter
D is day of year, in the range of integers 1 through 365

Model Calibration

Basic Data

Number of measurements:	55
Mean squared error:	0.06031936
Multiple R²:	0.5
Bias correction (smearing) factor:	1.18

Explanatory Variables

Variable	Value	Standard error
Intercept	1.58	0.6785
log₁₀(SC)	-0.576	0.2333
cos(2π D / 365)	-0.254	0.0473
sin(2π D / 365)	-0.0294	0.0561

Correlation Matrix

	Intercept	log₁₀(SC)	cos(2π D / 365)	sin(2π D / 365)
Intercept	1	-0.9987	-0.1995	0.5094
log₁₀(SC)	-0.9987	1	0.1944	-0.5017
cos(2π D / 365)	-0.1995	0.1944	1	0.109
sin(2π D / 365)	0.5094	-0.5017	0.109	1

Reference

Rasmussen, T.J., Ziegler, A.C., and Rasmussen, P.P., 2005, Estimation of Constituent Concentrations, Densities, Loads, and Yields in Lower Kansas River, Northeast Kansas, Using Regression Models and Continuous Water-Quality Monitoring, January 2000 Through December 2003: U.S. Geological Survey Scientific Investigations Report 2005-5165, 117 p.