Scientific Investigations Report 2006–5101–D
U.S. GEOLOGICAL SURVEY
Scientific Investigations Report 2006–5101–D
Table 2. Correlations of urban indicator metrics and environmental setting metrics, Willamette River basin and surrounding area, Oregon and Washington.
[See appendix A for variable definitions. Correlation coefficients were considered strong when ≥ 0.66 (bolded and shaded) and moderate when 0.66 > rho ≥ 0.5 (bolded). Abbreviations: ROADDEN, road density; m, meter. Symbols: ≥, greater than or equal to; >, greater than; –, not applicable]
| Urban indicators | Mean soil erodibility |
Watershed elevation | Organic matter (mean percent) |
Annual precipitation |
Water surface
slope (mean percent) |
Water depth (mean depth) |
Mean | Minimum |
|---|---|---|---|---|---|---|---|---|
| Urban indicator metrics | ||||||||
| Urban intensity index (UII) | 0.63 | -0.87 | -0.53 | -0.61 | -0.71 | -0.81 | -0.70 | |
| Percent impervious surface | .57 | -.90 | -.59 | -.64 | -.67 | -.85 | -.68 | |
| POPDEN00 | .60 | -.88 | -.55 | -.62 | -.70 | -.81 | -.69 | |
| Percent urban + agriculture | .55 | -.87 | -.52 | -.53 | -.62 | -.90 | -.53 | |
| ROADDEN | .52 | -.81 | -.48 | -.54 | -.66 | -.76 | -.65 | |
| Environmental setting metrics | ||||||||
| Mean watershed elevation (m) | -0.75 | – | 0.76 | 0.72 | 0.76 | 0.81 | 0.70 | |
| Minimum watershed elevation (m) | -.71 | 0.76 | – | .59 | .63 | .40 | .68 | |
U.S. Department of the Interior | U.S. Geological Survey
URL: https://pubs.usgs.gov/sir/2006/5101-D
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