DRAINAGE AREA = 14,100 SQ. MI.
200 1460
FU LL P OOL EL.. 1,444.0 FT .
180 1440
160 1420
ELEVATION
140 1400
ELEVATION IN FEET
CRITICAL RULE CURVE
FLOW IN 1,000 CFS
BASE ENERGY CONTENT CURVE M I N I M U M POOL EL. 1,378.0 FT
FLOOD CONTROL RULE CURVE
120 VARIABLE REFILL CURVE 1380
INFLOW
OUTFLOW
100 1360
80 1340
60 1320
40 1300
20 1280
0 1260
JUL AUG SEP OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP
STORAGE AND STREAMFLOW HYDROGRAPHS 1998 - 1999
COLUMBIA RIVER AT ARROW PROJECT, BRITISH COLUMBIA
Chart 7
DRAINAGE AREA = 8,985 SQ. MI.
200 2500
FU LL POOL EL. 2,459.0 FT .
180 2450
160 2400
140 2350
ELEVATION IN FEET
FLOW IN 1,000 CFS
ELEVATION
CRITICAL RULE CURVE
120 BASE ENERGY CONTENT CURVE 2300
FLOOD CONTROL RULE CURVE M I N I M U M POOL EL. 2,287.0 F T.
VARIABLE ENERGY CURVE
100 INFLOW 2250
OUTFLOW
80 2200
60 2150
40 2100
20 2050
0 2000
JUL AUG SEP OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP
STORAGE AND STREAMFLOW HYDROGRAPHS 1998 - 1999
KOOTENAI RIVER AT LIBBY PROJECT, MONTANA
Chart 8