Model Form #2
log10(Cl) =
- 3.92 + 1.91 log10(SC)
+ 0.12 log10(TURB)
where:
- Cl is computed chloride, in milligrams per liter
- SC is specific conductance at 25 degrees Celsius, in microsiemens per centimeter
- TURB is turbidity, in formazin nephelometric units
Model Calibration
Basic Data
| Number of measurements: | 116 |
|---|---|
| Mean squared error: | 0.01 |
| Multiple R2: | 0.79 |
| Bias correction (smearing) factor: | 1.03 |
Explanatory Variables
| Variable | Value | Standard error |
|---|---|---|
| Intercept | -3.92 | 0.34 | log10(SC) | 1.91 | 0.11 | log10(TURB) | 0.12 | 0.02 |
Correlation Matrix
| Intercept | log10(SC) | log10(TURB) | |
|---|---|---|---|
| Intercept | 1 | -0.998 | -0.797 |
| log10(SC) | -0.998 | 1 | 0.757 |
| log10(TURB) | -0.797 | 0.757 | 1 |
Reference
- Baldwin, A.K., Robertson, D.M., Saad, D.A., and Magruder, Christopher, 2013, Refinement of regression models to estimate real-time concentrations of contaminants in the Menomonee River drainage basin, southeast Wisconsin, 2008–11: U.S. Geological Survey Scientific Investigations Report 2013-5174, 113 p., seven appendixes