Scientific Investigations Report 2006–5101–D
U.S. GEOLOGICAL SURVEY
Scientific Investigations Report 2006–5101–D
Table A4. Reach-scale habitat variables.
[Abbreviations: mm, millimeter; CV, coefficient of variance. Symbol: >, greater than]
| Description | Variable code | Definition |
|---|---|---|
| Mean embeddedness (riffle and runs) | EmbedPctAvgRR | Mean embeddedness (percent) for transects in riffle and run habitat only (excluding pool) |
| Mean width/depth ratio (riffle and runs) | WidthDepthAvgRR | Mean wetted-channel width-depth ratio of transects in riffle and run habitat only (excluding pool) |
| Percent riffle habitat | GCUTypeRiffPct | Relative proportion of the total length of all geomorphic channel units that are comprised of riffles (percent) |
| Percent large substrate | DomSub5-10Pct | Percentage of occurrence of transect points where the dominant substrate consists of larger than coarse gravel particles (>16 mm) |
| Mean habitat heterogeneity | stanRHH | sumRHH = Reach Habitat Heterogeneity Index scaled to 0–10, sum of CV of Shape Index, CV velocity, and CV substrate |
U.S. Department of the Interior | U.S. Geological Survey
URL: https://pubs.usgs.gov/sir/2006/5101-D
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