Table 4.
Correlation coefficients for sediment transport factors
| Percentage detention efficiency | Total network | Wetland | Linear wetland | Long swale | Short swale |
|---|---|---|---|---|---|
| Pearson’s correlation coefficient | |||||
| Cumulative depth of rainfall | 0.13 | 0.31 | −0.29 | −0.06 | 0.36 |
| Velocity max | −0.23 | −0.37 | −0.52 | −0.08 | −0.69 |
| Running average velocity | −0.24 | 0.10 | −0.17 | 0.01 | −0.05 |
| Fr (Froude number) | 0.34 | 0.42 | −0.25 | −0.06 | 0.33 |
| Spearman’s Rho correlation | |||||
| Cumulative ADD | −0.20 | −0.95 | 0.11 | 0.28 | −0.75 |
| ADD since last sample | −0.06 | −0.12 | −0.05 | 0.01 | −0.05 |
| Wetted surface area | 0.43 | 0.55 | −0.23 | −0.15 | 0.36 |
| Stream power | 0.09 | 0.55 | −0.23 | −0.15 | 0.36 |
| Last prior event depth of rainfall | −0.17 | −0.96 | 0.40 | 0.36 | −0.75 |
| Average velocity | −0.30 | 0.05 | −0.28 | −0.20 | −0.52 |
| Average depth | 0.28 | 0.15 | −0.26 | −0.20 | −0.52 |
| Re (Reynold’s number) | −0.12 | 0.55 | −0.23 | −0.15 | 0.36 |
Values highlighted in bold show moderate correlation (0.3–0.6), and values in italics show strong correlation (>0.6). All factors are as at the time of sampling unless otherwise stated