Kansas Real-Time Water Quality

Kansas Real-Time Water Quality

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

Model Form #1

log₁₀(TRI) = - 0.135 - 0.186 cos(2π D / 365) - 0.0434 sin(2π D / 365)

where:

TRI is computed triazines, in micrograms per liter
D is day of year, in the range of integers 1 through 365

Model Calibration

Basic Data

Number of measurements:	48
Mean squared error:	0.07414729
Multiple R²:	0.2
Bias correction (smearing) factor:	1

Explanatory Variables

Variable	Value	Standard error
Intercept	-0.135	0.04
cos(2π D / 365)	-0.186	0.0551
sin(2π D / 365)	-0.0434	0.0575

Correlation Matrix

	Intercept	cos(2π D / 365)	sin(2π D / 365)
Intercept	1	-0.1527	0.1244
cos(2π D / 365)	-0.1527	1	-0.0837
sin(2π D / 365)	0.1244	-0.0837	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.