U.S. Department of the Interior U.S. Geological Survey Utah Water Science Center
Upper Colorado River Streamflow and Reservoir Contents
Provisional Data for: March 2018
All data contained in this report is provisional and subject to revision.
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 March 2018 31 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 3,934 2,921 74% 90,550 179,289 3,650 27 2,550 9 ADJUSTED (B) 2,695 69% 83,534 165,689 GREEN RIVER AT GREEN RIVER , UT 3,790 3,544 93% 109,850 217,503 4,130 4 3,220 17 ADJUSTED (C) 3,160 83% 97,960 194,303 SAN JUAN RIVER NEAR BLUFF, UT 1,262 507 40% 15,702 31,090 575 14 432 29 ADJUSTED (D) 452 36% 14,011 27,790
(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 3,426 829,500 533,500 -13,600 547,100 FLAMING GORGE RESERVOIR AT FLAMING GORGE DAM, UT (b) 15,100 3,739,000 3,184,300 -9,700 3,194,000 FONTENELLE RESERVOIR AT FONTENELLE , WYOMING (b) 4,280 344,300 117,400 -13,500 130,900 NAVAJO RESERVOIR NEAR ARCHULETA, NEW MEXICO (b) 3,320 1,696,000 1,236,400 -9,600 1,246,000 NIIP 6,300 LAKE POWELL RESERVOIR AT GLEN CANYON DAM, ARIZONA (b) 107,700 25,002,000 12,956,100 -389,700 13,345,800
TOTALS 31,620,800 18,027,700 -436,100 18,463,800 (a) Preliminary Data (b) Approximate Colorado River near Cisco, UT Monthly Mean Discharge (cubic feet per second) 16,000
14,000
12,000
10,000
8,000
6,000 DISCHARGE (cubic feet per second) 4,816
4,000 3,575 3,662 3,279 2,828 2,921
2,000
0 0 0 0 0 0 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
WY 2018 Monthly Mean Discharge 1981-2010 Median Monthly Discharge Green River at Green River, UT Monthly Mean Discharge (cubic feet per second) 14,000
12,000
10,000
8,000
6,000 DISCHARGE (cubic feet per second)
4,000 4,066 3,927 3,863 3,543 3,544 3,275
2,000
0 0 0 0 0 0 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
WY 2018 Monthly Mean Discharge 1981-2010 Median Monthly Discharge San Juan River near Bluff, UT Monthly Mean Discharge (cubic feet per second) 4,500
4,000
3,500
3,000
2,500
2,000
DISCHARGE (cubic feet per second) 1,500
1,000 1,049
789 695 646 575 500 507
0 0 0 0 0 0 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
WY 2018 Monthly Mean Discharge 1981-2010 Median Monthly Discharge Estimated Flow at Confluence Sum of Colorado River near Cisco, UT and Green River at Green River, UT Monthly Mean Discharge (cubic feet per second) 30,000
25,000
20,000
15,000
DISCHARGE (cubic feet per second) 10,000
8,092 7,590 7,118 7,142 6,895 6,465 5,000
0 0 0 0 0 0 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
WY 2018 Monthly Mean Discharge 1981-2010 Median Monthly Discharge Acre-feet 100,000 200,000 300,000 400,000 500,000 600,000 700,000 800,000 900,000 0 OCT 295,614 - 17 267,840 NOV 212,335 - 17 243,238 DEC 224,789 - 17
WY 2018 Monthly TotalWY (ac-ft) 2018Monthly 223,002 Colorado RiverCisco, near Utah Total Monthly Discharge (ac JAN 201,643 - 18 204,481 FEB 156,796 - 18 185,365 MAR 179,289 1981-2010 Median Total1981-2010 (ac-ft) Monthly - 18 241,949 APR 0 - 18 404,736 MAY -
0 ft) - 18 775,050 JUN 0 - 18 821,674
JUL 0 - 18 341,149 AUG 0 - 18 255,440 SEP 0 - 18 253,258 Acre-feet 100,000 200,000 300,000 400,000 500,000 600,000 700,000 800,000 0 OCT 201,049 - 17 181,100 NOV 210,474 - 17 177,657 DEC 241,065 - 17
WY 2018 Monthly TotalWY (ac-ft) 2018Monthly 145,259 Green River atGreen River, Utah Total Monthly Discharge (ac JAN 237,504 - 18 153,681 FEB 225,443 - 18 159,276 MAR 217,503 1981-2010 Median Total1981-2010 (ac-ft) Monthly - 18 233,120 APR 0 - 18 311,984 MAY -
0 ft) - 18 715,629 JUN 0 - 18 734,973
JUL 0 - 18 226,077 AUG 0 - 18 151,280 SEP 0 - 18 150,348 Acre-feet 100,000 150,000 200,000 250,000 300,000 50,000 0 OCT 64,400 - 17 75,729 NOV 46,871 - 17 67,605 DEC 42,675 - 17
WY 2018 Monthly TotalWY (ac-ft) 2018Monthly 62,694 Total Monthly Discharge (ac San Juan Rivernear Bluff,Utah JAN 39,733 - 18 63,081 FEB 31,852 - 18 67,615 MAR 31,090 1981-2010 Median Total1981-2010 (ac-ft) Monthly - 18 77,594 APR 0 - 18 105,092 MAY -
0 ft) - 18 258,813 JUN 0 - 18 233,914
JUL 0 - 18 97,236 AUG 0 - 18 72,297 SEP 0 - 18 75,114 AC-FT 1,000,000 1,200,000 1,400,000 1,600,000 1,800,000 2,000,000 200,000 400,000 600,000 800,000 0
Oct-17 561,063
524,669 Nov-17 469,680
488,500 SUM OF MAJOR INFLOWSSUM OF MAJOR TO POWELL LAKE Dec-17 508,529
WY 2018 Monthly TotalWY (ac-ft) 2018Monthly 430,955 Total Monthly Discharge (ac
Jan-18 478,880
421,243
Feb-18 414,091
412,255 Mar-18
1981-2010 Median Total1981-2010 (ac-ft) Monthly 427,882
552,663
Apr-18 0
821,812 May-18 -
0 ft)
1,749,491
Jun-18 0
1,790,560
Jul-18 0
664,461 Aug-18 0
479,017
Sep-18 0
478,719 Colorado River near Cisco, UT Total Monthly Discharge as Percent of 30 year (1981-2010) Median 120
110
100 101 99
87 85 80
74
60 Percent
40
20
0 0 0 0 0 0 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
Colorado River near Cisco, Utah Green River at Green River, UT Total Monthly Discharge as Percent of 30 year (1981-2010) Median 180
166 160 155
140 142
120 118 111
100 93 Percent 80
60
40
20
0 0 0 0 0 0 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
Green River at Green River, Utah San Juan near Bluff, UT Total Monthly Discharge as Percent of 30 year (1981-2010) Median 100
90
85
80
70 69 68
63 60
50
Percent 47
40 40
30
20
10
0 0 0 0 0 0 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
San Juan River near Bluff, Utah SUM OF FLOWS TO LAKE POWELL TOTAL MONTHLY DISCHARGE AS PERCENT OF 30 YEAR (1981-2010) MEDIAN 140
118 120 114
107
100 100 96
80 77 Percent
60
40
20
0 0 0 0 0 0 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 10,000,000 Annual Total Discharge (ac-ft)
9,000,000 8,814,347
8,000,000
7,000,000
6,000,000 FT - 5,000,000 AC
4,217,180
4,000,000
3,340,381
3,000,000 2,860,125
2,000,000
1,270,466 1,333,038 1,256,785
1,000,000
256,621
0 Colorado River nr Cisco, UT Green River at Green River, UT San Juan River nr Bluff, UT Sum of Major Inflow to Lake Powell
Annual Total WY 2018 Total Discharge (ac-feet) 1981-2010 Median Annual Total Discharge (ac-feet) Annual Total Discharge as Percent of 30 year Median (1981-2010)
100
90
80
70
60
50 PERCENT 40 40 32 30 30 20
20
10
0 COLORADO RIVER NR CISCO, UT GREEN RIVER AT GREEN RIVER, UT SAN JUAN RIVER NR BLUFF, UT SUM OF MAJOR INFLOW TO LAKE POWELL
Annual Total Discharge as Percent of 30 year Median (1981-2010)