Model Form #1
log10(CLR) =
- 0.928 + 0.911 log10(SC)
- 0.141 log10(Q)
- 0.0391 cos(4π D / 365)
- 0.0209 sin(4π D / 365)
- 2.29E-5 D
where:
- CLR is computed chloride, in milligrams per liter
- 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
- D is day of year, in the range of integers 1 through 365
Model Calibration
Basic Data
| Number of measurements: | 64 |
|---|---|
| Mean squared error: | 0.003481 |
| Multiple R2: | 0.77 |
| Bias correction (smearing) factor: | 1.00196 |
Explanatory Variables
| Variable | Value | Standard error |
|---|---|---|
| Intercept | -0.928 | 0.059 | log10(SC) | 0.911 | 0.0209 | log10(Q) | -0.141 | 0.1 | cos(4π D / 365) | -0.0391 | 0.0115 | sin(4π D / 365) | -0.0209 | 0.0122 | D | -2.29E-5 | 8.68E-6 |
Correlation Matrix
A correlation matrix is not available for this model. Therefore, the prediction interval was calculated by assuming that there is no correlation between the explanatory variables.
Reference
- Galloway, J., 2014, Continuous Water-Quality Monitoring and Regression Analysis to Estimate Constituent Concentrations and Loads in the Red River of the North at Fargo and Grand Forks, North Dakota, 2003–12: U.S. Geological Survey Scientific Investigations Report 2014–5064, 37 p.