Preliminary Estimations: Umpqua

 

Range for Annual Precipitation

36 - 70 in
914 - 1778 mm

Annual discharge per unit area

2.52 ft3/mi2
0.028 m3/km2

Monthly flow as a percent of Annual Flow (%)

OCT

NOV

DEC

JAN

FEB

MAR

APR

MAY

JUNE

JULY

AUG

SEPT
2
8
15
18
16
13
10
7
4
2
1
1

*Note: Values for monthly flow as a percentage of annual flow do not add up to 100% due to overlapping of drainage areas (i.e., nesting) of some or all gages used to calculate the percentages.

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