Kansas Real-Time Water Quality

USGS station:	Go to NWISWeb
Constituent:
Time period:

Model Form

log₁₀(ECB) = 0.632 + 1.01 log₁₀(TURB)

where:

ECB is computed E. coli, in colonies per 100 milliliters
TURB is turbidity, YSI model 6136, in formazin nephelometric units

Model Calibration

Basic Data

Number of measurements:	23
Mean squared error:	0.289444
Multiple R²:	0.63
Bias correction (smearing) factor:	2.28

Explanatory Variables

Variable	Value	Standard error
Intercept	0.632	0.3791
log₁₀(TURB)	1.01	0.1798

Covariance Matrix

	Intercept	log₁₀(TURB)
Intercept	1	-0.9552
log₁₀(TURB)	-0.9552	1

Reference

U.S. Geological Survey, 2007, Modification of turbidity-based regression models for use with 6136 turbidimeters, Little Arkansas River, Kansas: Online Report

Notes

Model was modified from the original publication source. Beginning in 2007, station's 6026-model turbidity sensor was replaced with a 6136-model sensor. A side-by-side comparison indicated that, at this station, multiplying measurements from a 6136 sensor by 0.64 makes them approximately equivalent to measurements from a 6026 sensor. This conversion factor has been incorporated into this model.