Kansas Real-Time Water Quality

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

Model Form #2

log₁₀(CLR) = - 1.905 + 1.316 log₁₀(SC)

where:

CLR is computed chloride, in milligrams per liter
SC is specific conductance at 25 degrees Celsius, in microsiemens per centimeter

Model Archive Summary

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

Model Calibration

Basic Data

Number of measurements:	329
Mean squared error:	0.01990921
Multiple R²:	0.87
Bias correction (smearing) factor:	1.05

Explanatory Variables

Variable	Value	Standard error
Intercept	-1.905	0.0773
log₁₀(SC)	1.316	0.02833

Correlation Matrix

A correlation matrix is not available for this model. Therefore, the prediction interval was calculated by assuming that there is no correlation between the explanatory variables.

Reference

Stone, M.L., and Klager, B.J., 2022, Documentation of models describing relations between continuous real-time and discrete water-quality constituents in the Little Arkansas River, south-central Kansas, 1998-2019: U.S. Geological Survey Open-File Report 2022-1010, 34 p.

Notes

Model derived using Tobit regression estimation (absolute maximum likelihood estimation) approach.