Virginia Real-Time Water Quality

Virginia Real-Time Water Quality

NRTWQ Home >> Virginia >> View Data >> 01645762

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

Model Form #1

ln(TPR) = - 4.854 + 0.605 ln(TURB) + 0.15 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:	199
Mean squared error:	0.36747844
Multiple R²:	0.85
Bias correction (smearing) factor:	1.22

Explanatory Variables

Variable	Value	Standard error
Intercept	-4.854	0.102
ln(TURB)	0.605	0.036
ln(Q)	0.15	0.043

Correlation Matrix

	Intercept	ln(TURB)	ln(Q)
Intercept	1	-0.002	-0.001
ln(TURB)	-0.002	1	-0.0013
ln(Q)	-0.001	-0.0013	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.