Texas Real-Time Water Quality

USGS station:

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Constituent:
Time period:
Model Form:

Model Form #1

log10(TP) = - 1.4584 - 0.0811 log10(Q) + 0.4574 log10(TURB) - 0.0443 sin(2π D / 365) - 0.02 cos(2π D / 365) - 0.0038 sin(4π D / 365) - 0.0529 cos(4π D / 365)

where:

Model Calibration

Basic Data

Number of measurements: 44
Mean squared error: 0.00736164
Multiple R2: 0.7314
Bias correction (smearing) factor: 1.0172

Explanatory Variables

VariableValueStandard error
Intercept-1.45840.05
log10(Q) -0.08110.0298
log10(TURB) 0.45740.0563
sin(2π D / 365) -0.04430.0168
cos(2π D / 365) -0.020.0206
sin(4π D / 365) -0.00380.0175
cos(4π D / 365) -0.05290.0176

Correlation Matrix

Interceptlog10(Q) log10(TURB) sin(2π D / 365) cos(2π D / 365) sin(4π D / 365) cos(4π D / 365)
Intercept1-0.0607-0.5696-0.15560.2165-0.0813-0.031
log10(Q) -0.06071-0.77130.0769-0.48530.23060.2231
log10(TURB) -0.5696-0.771310.03460.2244-0.1423-0.1484
sin(2π D / 365) -0.15560.07690.03461-0.1018-0.02130.066
cos(2π D / 365) 0.2165-0.48530.2244-0.10181-0.1299-0.1356
sin(4π D / 365) -0.08130.2306-0.1423-0.0213-0.129910.062
cos(4π D / 365) -0.0310.2231-0.14840.066-0.13560.0621