Some regression models require post-processing of streamflow data during ice-affected periods in the winter. Please check back in spring for real-time estimates and estimates from the prior winter.
Model Form #1
ln(Sb) =
- 11.776 + 2.888 ln(SC)
+ 0.615 ln(Q)
+ 0.181 sin(2π D / 365)
+ 0.156 cos(2π D / 365)
where:
- Sb is computed antimony, in micrograms per liter
- SC is specific conductance at 25 degrees Celsius, in microsiemens per centimeter
- Q is computed discharge, 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: | 21 |
|---|---|
| Mean squared error: | 0.02560025600064 |
| Multiple R2: | 0.91 |
| Bias correction (smearing) factor: | 1.01 |
Explanatory Variables
| Variable | Value | Standard error |
|---|---|---|
| Intercept | -11.776 | 2.157 | ln(SC) | 2.888 | 0.373 | ln(Q) | 0.615 | 0.148 | sin(2π D / 365) | 0.181 | 0.074 | cos(2π D / 365) | 0.156 | 0.102 |
Correlation Matrix
| Intercept | ln(SC) | ln(Q) | sin(2π D / 365) | cos(2π D / 365) | |
|---|---|---|---|---|---|
| Intercept | 1 | -0.9948 | -0.946 | 0.3538 | -0.2364 |
| ln(SC) | -0.9948 | 1 | 0.9093 | -0.2901 | 0.1814 |
| ln(Q) | -0.946 | 0.9093 | 1 | -0.5198 | 0.4416 |
| sin(2π D / 365) | 0.3538 | -0.2901 | -0.5198 | 1 | -0.2153 |
| cos(2π D / 365) | -0.2364 | 0.1814 | 0.4416 | -0.2153 | 1 |
Reference
- Etheridge, A.B., 2015, Occurrence and transport of selected constituents in streams near the Stibnite mining area, central Idaho, 2012–14: U.S. Geological Survey Scientific Investigations Report 2015–5166, 47 p.