Model Form #1
ln(Sb) =
- 14.457 + 2.92 ln(SC)
+ 0.816 ln(Q)
+ 0.375 sin(2π D / 365)
+ 0.583 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, 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: | 18 |
|---|---|
| Mean squared error: | 0.032094005904 |
| Multiple R2: | 72 |
| Bias correction (smearing) factor: | 1.012 |
Explanatory Variables
| Variable | Value | Standard error |
|---|---|---|
| Intercept | -14.457 | 6.272 | ln(SC) | 2.92 | 1.381 | ln(Q) | 0.816 | 0.329 | sin(2π D / 365) | 0.375 | 0.109 | cos(2π D / 365) | 0.583 | 0.168 |
Correlation Matrix
| Intercept | ln(SC) | ln(Q) | sin(2π D / 365) | cos(2π D / 365) | |
|---|---|---|---|---|---|
| Intercept | 1 | -0.9997 | -0.9838 | -0.6559 | -0.0879 |
| ln(SC) | -0.9997 | 1 | 0.9803 | 0.6662 | 0.0824 |
| ln(Q) | -0.9838 | 0.9803 | 1 | 0.5664 | 0.2144 |
| sin(2π D / 365) | -0.6559 | 0.6662 | 0.5664 | 1 | -0.0452 |
| cos(2π D / 365) | -0.0879 | 0.0824 | 0.2144 | -0.0452 | 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.