Developed in partnership with the Lower Platte River Corridor Alliance and the Nebraska Environmental Trust
Model Form #1
log10(ECBR) =
12.0344 + 0.9637 log10(TURB)
- 3.8001 log10(SC)
where:
- ECBR is computed E. coli, in colonies per 100 milliliters
- TURB is turbidity, YSI model 6136, in formazin nephelometric units
- SC is specific conductance at 25 degrees Celsius, in microsiemens per centimeter
Model Calibration
Basic Data
| Number of measurements: | 20 |
|---|---|
| Mean squared error: | 0.1444 |
| Multiple R2: | 0.83 |
| Bias correction (smearing) factor: | 1.33 |
Explanatory Variables
| Variable | Value | Standard error |
|---|---|---|
| Intercept | 12.0344 | 3.1733 | log10(TURB) | 0.9637 | 0.2031 | log10(SC) | -3.8001 | 1.0403 |
Correlation Matrix
| Intercept | log10(TURB) | log10(SC) | |
|---|---|---|---|
| Intercept | 1 | -0.6941 | -0.9947 |
| log10(TURB) | -0.6941 | 1 | 0.6192 |
| log10(SC) | -0.9947 | 0.6192 | 1 |
Reference
- Schaepe, Nathaniel J.; Soenksen, Philip J.; Rus, David L., 2014, Relations of water-quality constituent concentrations to surrogate measurements in the lower Platte River corridor, Nebraska, 2007 through 2011: U.S. Geological Survey Open-File Report 2014–1149, 16 p.