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 #2

log₁₀(TRI) = 0.134 - 0.000203 log₁₀(SC) + 0.06158 sin(2π D / 365) - 0.4224 cos(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 Archive Summary

The model archive summary for computed triazines can be viewed in pdf form here.

Model Calibration

Basic Data

Number of measurements:	45
Mean squared error:	0.2916
Multiple R²:	0.29
Bias correction (smearing) factor:	1.69

Explanatory Variables

Variable	Value	Standard error
Intercept	0.134	0.226
log₁₀(SC)	-0.000203	0.000322
sin(2π D / 365)	0.06158	0.134
cos(2π D / 365)	-0.4224	0.159

Correlation Matrix

	Intercept	log₁₀(SC)	sin(2π D / 365)	cos(2π D / 365)
Intercept	1	-0.903	-0.0872	0.708
log₁₀(SC)	-0.903	1	-0.085	-0.643
sin(2π D / 365)	-0.0872	-0.085	1	0.103
cos(2π D / 365)	0.708	-0.643	0.103	1

Reference

King, A.S., Rasmussen, P.P., and Ziegler, A.C., 2012, Use of regression analysis and continuous real-time water-quality monitoring to compute constituent concentrations, loads, and yields in the Little Arkansas River, south-central Kansas, 1995-2011: U.S. Geological Survey Scientific Investigations Report 2012-XXXX, XX pp.