Scientific Investigations Report 2006–5230
U.S. GEOLOGICAL SURVEY
Scientific Investigations Report 2006–5230
Table 2. Calculated and estimated 80-, 50-, and 20-percent monthly exceedance discharge values for Big Boulder Creek near Clayton (13297500), upper Salmon River Basin, Idaho.
[Values presented in cubic feet per second. Long term: Based on data for water years 1926–29 and 2005]
| July | August | September | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Q.80 | Q.50 | Q.20 | Q.80 | Q.50 | Q.20 | Q.80 | Q.50 | Q.20 | |||
| Water year 2005 | 25.7 | 38.2 | 54.1 | 15.1 | 17.8 | 22.9 | 10.3 | 11.5 | 12.4 | ||
| Long term | 24.7 | 43.6 | 65.4 | 14.7 | 22.1 | 28.0 | 8.00 | 12.5 | 16.0 | ||
| Regional regression equations | |||||||||||
| Upper confidence limit | 40.4 | 58.6 | 81.1 | 21.4 | 32.7 | 36.9 | 15.4 | 22.2 | 23.2 | ||
| Estimate | 18.2 | 32.0 | 51.8 | 10.2 | 15.0 | 23.1 | 7.56 | 10.6 | 15.0 | ||
| Lower confidence limit | 8.21 | 17.5 | 33.1 | 4.85 | 6.88 | 14.4 | 3.71 | 5.06 | 9.69 | ||
U.S.
Department of the Interior | U.S. Geological
Survey
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