Kansas Real-Time Water Quality

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

Model Form #1

log₁₀(Br) = - 4.304 + 1.269 log₁₀(SC)

where:

Br is computed bromide, 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 bromide can be viewed in pdf form here.

Model Calibration

Basic Data

Number of measurements:	59
Mean squared error:	0.018769
Multiple R²:	0.89
Bias correction (smearing) factor:	1.04

Explanatory Variables

Variable	Value	Standard error
Intercept	-4.304	0.17574
log₁₀(SC)	1.269	0.06504

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., 2023, Long-term water-quality constituent trends in the Little Arkansas River, South-Central Kansas, 1995-2021: U.S. Geological Survey Scientific Investigations Report 2023-5102, 103 p.

Notes

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