Kansas Real-Time Water Quality

Kansas Real-Time Water Quality

NRTWQ Home >> Kansas >> View Data >> 06888990

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

Model Form #1

log₁₀(Ca) = - 0.234 + 0.739 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 Archive Summary

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

Model Calibration

Basic Data

Number of measurements:	34
Mean squared error:	0.00159201
Multiple R²:	0.938
Bias correction (smearing) factor:	1

Explanatory Variables

Variable	Value	Standard error
Intercept	-0.234	0.0953
log₁₀(SC)	0.739	0.0332

Correlation Matrix

	Intercept	log₁₀(SC)
Intercept	1	-0.997
log₁₀(SC)	-0.997	1

Reference

Williams, T.J., 2023, Linear regression model documentation for computing water-quality constituent concentrations or densities using continuous real-time water-quality data for the Kansas River above Topeka Weir at Topeka, Kansas, November 2018 through June 2021: U.S. Geological Survey Scientific Investigations Report 2022-5130, 14 p.