Virginia Real-Time Water Quality

Virginia Real-Time Water Quality

NRTWQ Home >> Virginia >> View Data >> 01646305

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

Model Form #1

ln(TPR) = - 3.804 + 0.47 ln(TURB) + 0.091 ln(Q)

where:

TPR is computed total phosphorous, in milligrams per liter
TURB is turbidity, YSI model 6136, in formazin nephelometric units
Q is computed discharge, stage-discharge rating curve, in cubic feet per second

Model Calibration

Basic Data

Number of measurements:	206
Mean squared error:	0.24790441
Multiple R²:	0.85
Bias correction (smearing) factor:	1.13

Explanatory Variables

Variable	Value	Standard error
Intercept	-3.804	0.072
ln(TURB)	0.47	0.034
ln(Q)	0.091	0.037

Correlation Matrix

	Intercept	ln(TURB)	ln(Q)
Intercept	1	-0.001	0.0006
ln(TURB)	-0.001	1	-0.002
ln(Q)	0.0006	-0.002	1

Reference

Jastram, J.D., 2014, Streamflow, Water Quality, and Aquatic Macroinvertebrates of Selected Streams in Fairfax County, Virginia, 2007–12: U.S. Geological Survey Scientific Investigations Report 2014–5073, 68 p.