Scientific Investigations Report 2006–5230

U.S. GEOLOGICAL SURVEY
Scientific Investigations Report 2006–5230

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Table 8. Calculated and estimated 80-, 50-, and 20-percent monthly exceedance discharge values for Morgan Creek above West Fork Morgan Creek near Challis (13299255), upper Salmon River Basin, Idaho.

[Values presented in cubic feet per second]

  July   August   September
Q.80 Q.50 Q.20 Q.80 Q.50 Q.20 Q.80 Q.50 Q.20
Water year 2005 1.43 5.08 10.7 0.33 0.55 0.98 3.47 5.08 5.62
Regional regression equations
Upper confidence limit 23.5 34.5 55.8 14.2 21.3 25.6 13.0 17.9 20.3
Estimate 10.6 18.8 35.6 6.77 9.76 16.0 6.36 8.52 13.1
Lower confidence limit 4.80 10.3 22.7 3.20 4.50 10.0 3.10 4.10 8.50

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