Model Form #1
ln(Sb) =
- 9.525 + 2.377 ln(SC)
+ 0.503 ln(Q)
+ 0.532 sin(2π D / 365)
+ 0.303 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: | 22 |
|---|---|
| Mean squared error: | 0.130110982681 |
| Multiple R2: | 65 |
| Bias correction (smearing) factor: | 1.055 |
Explanatory Variables
| Variable | Value | Standard error |
|---|---|---|
| Intercept | -9.525 | 4.14 | ln(SC) | 2.377 | 0.771 | ln(Q) | 0.503 | 0.271 | sin(2π D / 365) | 0.532 | 0.164 | cos(2π D / 365) | 0.303 | 0.199 |
Correlation Matrix
| Intercept | ln(SC) | ln(Q) | sin(2π D / 365) | cos(2π D / 365) | |
|---|---|---|---|---|---|
| Intercept | 1 | -0.9948 | -0.9296 | 0.3471 | -0.0937 |
| ln(SC) | -0.9948 | 1 | 0.8888 | -0.28 | 0.0499 |
| ln(Q) | -0.9296 | 0.8888 | 1 | -0.5441 | 0.3119 |
| sin(2π D / 365) | 0.3471 | -0.28 | -0.5441 | 1 | -0.1485 |
| cos(2π D / 365) | -0.0937 | 0.0499 | 0.3119 | -0.1485 | 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.