Scientific Investigations Report 2006–5101–D
U.S. GEOLOGICAL SURVEY
Scientific Investigations Report 2006–5101–D
Table A5. Hydrologic variation metrics.
[Abbreviations: POR, period of record. Symbols: >, greater than; ≥, greater than or equal to]
| Description | Variable code | Definition |
|---|---|---|
| Number of falling events > 5×median (PeriodF5) | d_periodf5 | Frequency of falling stream-discharge events, where hourly stream-discharge change is ≥5 multiplied by the median fall over POR (number of hourly periods) |
| Number of falling events > 9×median (PeriodF9) | d_periodf9 | Frequency of falling stream-discharge events, where hourly stream-discharge change is ≥9 multiplied by the median fall over POR (number of hourly periods) |
| Number of rising events > 5×median (PeriodR5) | d_periodr5 | Frequency of rising stream-discharge events, where hourly stream-discharge change is ≥5 multiplied by the median rise over POR (number of hourly periods) |
| Richards-Baker Flashiness Index (Rb-flash) | d_rb_flash | Version of Richards-Baker Flashiness Index (Baker and others, 2004), calculated as the sum of the absolute value of the relative change in daily mean stream discharge, divided by the sum of the daily mean stream discharge for the POR (dimensionless) |
U.S. Department of the Interior | U.S. Geological Survey
URL: https://pubs.usgs.gov/sir/2006/5101-D
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