Model Form #1
log10(Atz) =
- 0.8096 - 0.2253 log10(Q)
+ 0.7473 log10(TURB)
+ 0.4027 sin(2π D / 365)
- 0.0718 cos(2π D / 365)
- 0.0105 sin(4π D / 365)
- 0.2353 cos(4π D / 365)
where:
- Atz is computed atrazine, wf, elisa, in micrograms per liter
- Q is computed discharge, in cubic feet per second
- TURB is turbidity, in formazin nephelometric units
- D is day of year, in the range of integers 1 through 365
Model Calibration
Basic Data
| Number of measurements: | 58 |
|---|---|
| Mean squared error: | 0.058564 |
| Multiple R2: | 1.001 |
| Bias correction (smearing) factor: | 1.0696 |
Explanatory Variables
| Variable | Value | Standard error |
|---|---|---|
| Intercept | -0.8096 | 0.1537 | log10(Q) | -0.2253 | 0.076 | log10(TURB) | 0.7473 | 0.1359 | sin(2π D / 365) | 0.4027 | 0.0451 | cos(2π D / 365) | -0.0718 | 0.0489 | sin(4π D / 365) | -0.0105 | 0.0497 | cos(4π D / 365) | -0.2353 | 0.0486 |
Correlation Matrix
| Intercept | log10(Q) | log10(TURB) | sin(2π D / 365) | cos(2π D / 365) | sin(4π D / 365) | cos(4π D / 365) | |
|---|---|---|---|---|---|---|---|
| Intercept | 1 | 0.0223 | -0.6761 | -0.2079 | -0.1187 | -0.4198 | -0.0427 |
| log10(Q) | 0.0223 | 1 | -0.7376 | 0.0807 | -0.0864 | 0.1763 | 0.1573 |
| log10(TURB) | -0.6761 | -0.7376 | 1 | 0.0791 | 0.1681 | 0.1588 | -0.0654 |
| sin(2π D / 365) | -0.2079 | 0.0807 | 0.0791 | 1 | 0.0031 | 0.1904 | 0.0994 |
| cos(2π D / 365) | -0.1187 | -0.0864 | 0.1681 | 0.0031 | 1 | 0.0582 | 0.1181 |
| sin(4π D / 365) | -0.4198 | 0.1763 | 0.1588 | 0.1904 | 0.0582 | 1 | 0.1052 |
| cos(4π D / 365) | -0.0427 | 0.1573 | -0.0654 | 0.0994 | 0.1181 | 0.1052 | 1 |