Kansas Real-Time Water Quality

Kansas Real-Time Water Quality

NRTWQ Home >> Kansas >> View Data >> 07144100

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

Model Form #1

log₁₀(ALK) = 0.574 + 0.671 log₁₀(SC) - 0.1211 log₁₀(Q)

where:

ALK is computed alkalinity, in milligrams per liter as calcium carbonate
SC is specific conductance at 25 degrees Celsius, in microsiemens per centimeter
Q is computed discharge, stage-discharge rating curve, in cubic feet per second

Model Archive Summary

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

Model Calibration

Basic Data

Number of measurements:	131
Mean squared error:	0.0058813561
Multiple R²:	0.9364
Bias correction (smearing) factor:	1.01447

Explanatory Variables

Variable	Value	Standard error
Intercept	0.574	0.1487
log₁₀(SC)	0.671	0.0419
log₁₀(Q)	-0.1211	0.0163

Correlation Matrix

	Intercept	log₁₀(SC)	log₁₀(Q)
Intercept	1	-0.9895	-0.9151
log₁₀(SC)	-0.9895	1	0.8521
log₁₀(Q)	-0.9151	0.8521	1

Reference

Christensen, V.G., Ziegler, A.C., Rasmussen, P.P., and Jian, Xiaodong, 2003, Continuous Real-Time Water-Quality Monitoring of Kansas Streams, in Proceedings of 2003 Spring Specialty Conference on Agricultural Hydrology and Water Quality, May 12-14, 2003, Kansas City, Missouri: Middleburg, Virginia, American Water Resources Association, AWRA Technical Publication Series No. TPS-03-1, compact disc.

Notes

Old model used through 2006.