Kansas Real-Time Water Quality

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

Model Form #3

log₁₀(DOP) = - 0.196 - 0.00144 SC

where:

DOP is computed diss. orthophosphorus, in milligrams per liter as phosphorus
SC is specific conductance at 25 degrees Celsius, in microsiemens per centimeter

Model Archive Summary

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

Model Calibration

Basic Data

Number of measurements:	108
Mean squared error:	0.11950849
Multiple R²:	0.68
Bias correction (smearing) factor:	1.33

Explanatory Variables

Variable	Value	Standard error
Intercept	-0.196	0.09189
SC	-0.00144	0.0001073

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.

Notes

Model derived using Tobit regression estimation (absolute maximum likelihood estimation) approach. Regression models were updated in Kramer and others (2021) and the newest version of the model was applied beginning January 1, 2017. Computations using the previous version of the model (Stone and others, 2012) ended in 2016. More information detailing models, period of application, and computed concentrations can be found in Kramer and others (2021).