Kansas Real-Time Water Quality

Kansas Real-Time Water Quality

NRTWQ Home >> Kansas >> View Data >> 06893390

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

Model Form #1

log₁₀(Ca) = - 0.562 + 0.798 log₁₀(SC)

where:

Ca is computed calcium, in milligrams per liter as calcium
SC is specific conductance at 25 degrees Celsius, in microsiemens per centimeter

Model Calibration

Basic Data

Number of measurements:	22
Mean squared error:	0.00652864
Multiple R²:	0.88
Bias correction (smearing) factor:	1.02

Explanatory Variables

Variable	Value	Standard error
Intercept	-0.562	0.1782
log₁₀(SC)	0.798	0.0669

Correlation Matrix

	Intercept	log₁₀(SC)
Intercept	1	-0.9953
log₁₀(SC)	-0.9953	1

Reference

Rasmussen, T.J., Lee, C.J., and Ziegler, A.C., 2008, Estimation of Constituent Concentrations, Loads, and Yields in Streams of Johnson County, Northeast Kansas, Using Continuous Water-Quality Monitoring and Regression Models, October 2002 through December 2006: U.S. Geological Survey Scientific Investigations Report 2008-5014, 103 p.

Notes

does not match cited model, which is written as: logCa = 0.798logSC-0.562