U.S. Department of the Interior U.S. Geological Survey Utah Water Science Center
Upper Colorado River Streamflow and Reservoir Contents
Provisional Data for: February 2018
On the Web at: http://ut.water.usgs.gov/reports/ucr_monthly.html PROVISIONAL DATA U.S. GEOLOGICAL SURVEY SUBJECT TO REVISION UTAH WATER SCIENCE CENTER STREAMFLOW AND RESERVOIR CONTENTS IN UPPER COLORADO RIVER BASIN DAYS IN contact 435-259-4430 or [email protected] MONTH February 2018 29 MONTHLY DISCHARGE (a) MAXIMUM DAILY MINIMUM DAILY (A)MEDIAN PERCENT TOTAL 3 3 3 3 3 STREAM ft /s MEAN ft /s 30 YEAR ft /s ACRE ft /s DATE ft /s DATE (1981-2010) THIS MONTH MEDIAN DAYS FEET COLORADO RIVER NR CISCO, UTAH 3,307 2,828 86% 79,190 156,796 3,020 16 2,590 28 ADJUSTED (B) 2,597 79% 75,319 149,396 GREEN RIVER AT GREEN RIVER , UT 2,855 4,066 142% 113,860 225,443 4,310 12 3,650 25 ADJUSTED (C) 2,189 77% 63,495 125,943 SAN JUAN RIVER NEAR BLUFF, UT 1,217 575 47% 16,087 31,852 626 1 537 25 ADJUSTED (D) 422 35% 12,227 24,252
(A) MEDIAN OF MEAN DISCHARGES FOR THE MONTH FOR 30-YR PERIOD 1981-2010 (B) ADJUSTED FOR CHANGE IN STORAGE IN BLUE MESA RESERVOIR. STORAGE BEGAN OCT. 27, 1965 (C) ADJUSTED FOR CHANGE IN STORAGE IN FLAMING GORGE RESERVOIR & FONTENELLE RESERVOIR, STORAGE BEGAN NOV. 1, 1962 & OCT., 1964 RESPECTIVELY. (D) ADJUSTED FOR CHANGE IN STORAGE IN NAVAJO RESERVOIR (STORAGE BEGAN JUNE 27, 1962) AND SINCE AUGUST 1964, RELEASES TO NAVAJO INDIAN IRRIGATION PROJECT (NIIP). RELEASES TO NIIP BEGAN JANUARY 1976. e ESTIMATED DRAINAGE USABLE END OF MO. CHANGE DURING RESERVOIR ABOVE DAM CAPACITY USABLE CONTENTS MONTH PREVIOUS (MI2) (AC-FT) (AC-FT) (AC-FT) MONTH BLUE MESA RESERVOIR NEAR SAPINERO, COLORADO 3,426 829,500 547,100 -7,400 554,500 FLAMING GORGE RESERVOIR AT FLAMING GORGE DAM, UT (b) 15,100 3,739,000 3,194,000 -65,200 3,259,200 FONTENELLE RESERVOIR AT FONTENELLE , WYOMING (b) 4,280 344,300 130,900 -34,300 165,200 NAVAJO RESERVOIR NEAR ARCHULETA, NEW MEXICO (b) 3,320 1,696,000 1,246,000 -8,900 1,254,900 NIIP 1,300 LAKE POWELL RESERVOIR AT GLEN CANYON DAM, ARIZONA (b) 107,700 25,002,000 13,345,800 -326,500 13,672,300
TOTALS 31,620,800 18,463,800 -442,300 18,906,100 (a) Preliminary Data (b) Approximate Colorado River near Cisco, Utah 900,000
800,000
700,000
600,000
500,000 feet - WY 2018 Monthly Total (ac-ft)
Acre 400,000 1981-2010 Median Monthly Total (ac-ft)
300,000
200,000
100,000
0 Green River at Green River, Utah 800,000
700,000
600,000
500,000 feet - 400,000 WY 2018 Monthly Total (ac-ft) Acre 1981-2010 Median Monthly Total (ac-ft) 300,000
200,000
100,000
0 San Juan River near Bluff, Utah 300,000
250,000
200,000 feet - 150,000 WY 2018 Monthly Total (ac-ft) Acre 1981-2010 Median Monthly Total (ac-ft)
100,000
50,000
0 SUM OF MAJOR INFLOWS TO LAKE POWELL 2,000,000
1,800,000
1,600,000
1,400,000
1,200,000 ft - 1,000,000 WY 2018 Monthly Total (ac-ft) ac 1981-2010 Median Monthly Total (ac-ft)
800,000
600,000
400,000
200,000
0 Oct-17 Nov-17 Dec-17 Jan-18 Feb-18 Mar-18 Apr-18 May-18 Jun-18 Jul-18 Aug-18 Sep-18 Total Monthly Discharge as Percent of 30 year (1981-2010) Median 120
100
80
60
Percent Colorado River near Cisco, Utah
40
20
0 Total Monthly Discharge as Percent of 30 year (1981-2010) Median 180
160
140
120
100
Percent 80 Green River at Green River, Utah
60
40
20
0 Total Monthly Discharge as Percent of 30 year (1981-2010) Median 100
90
80
70
60
50
Percent San Juan River near Bluff, Utah 40
30
20
10
0 Total Monthly Discharge as Percent of 30 year (1981-2010) Median 150
130
110
90
70 Total Discharge of Major Inflows to Lake
Percent Powell
50
30
10
-10 10,000,000
9,000,000
8,000,000
7,000,000
6,000,000
5,000,000 Annual Total WY 2018 Total Discharge (ac-feet) 1981-2010 Median Annual Total Discharge (ac-feet)
4,000,000
3,000,000
2,000,000
1,000,000
0 Colorado River nr Green River at Green San Juan River nr Bluff,Sum of Major Inflow to Cisco, UT River, UT UT Lake Powell Annual Total Discharge as Percent of 30 year Median (1981-2010)
100
90
80
70
60
50 Annual Total Discharge as Percent of 30 year Median (1981-2010)
40
30
20
10
0 Colorado River nr Green River at San Juan River nr Sum of Major Cisco, UT Green River, UT Bluff, UT Inflow to Lake Powell