USGS Water-Year Summary for Site USGS 09522000

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	00060 Discharge(Mean)

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Water year 2020: 2019-10-01 to 2020-09-30

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USGS Water-Year Summary 2020

09522000 COLORADO RIVER AT NORTHERLY INTERNATIONAL BOUNDARY, ABOVE MORELOS DAM, NEAR ANDRADE, CA

LOCATION - Lat 32°43'07", long 114°43'05" referenced to North American Datum of 1927, Yuma County, AZ, Hydrologic Unit 15030108, Gila and Salt River meridian, in Yuma County, AZ, on left bank at northerly international boundary, 0.5 miles east of Andrade, 1.1 miles upstream from Morelos Dam, 1.1 miles downstream from Rockwood Gate, and 6.4 miles downstream from gaging station on Colorado River below Yuma Main Canal Waste Way.

DRAINAGE AREA - 246,700 mi², approximately, including all closed basins entirely within the drainage boundary, also 3,959 mi² in Great Divide Basin in southern Wyoming.

SURFACE-WATER RECORDS

PERIOD OF RECORD - Jan. 1950 to current year. Prior to Oct. 1958 published as "at international boundary."

GAGE - Water-stage recorder.

COOPERATION - Discharges are furnished by International Boundary Water Commission. These discharge figures are then rounded in accordance with standard USGS policy.

REMARKS - Record is rated good. This record exhibits flows across the Northerly International Boundary above Morales Dam. Minor diversions to the United States below this station by pumping from ground water for irrigation in the floodway between river and Yuma levee. Station is accounting point for 1944 International Treaty detailing water delivery to Mexico.

EXTREMES FOR PERIOD OF RECORD - Maximum discharge, 40,600 ft³/s, Aug. 20, 1983; maximum elevation, 115.65 ft, Aug. 18 and 19, 1983; minimum discharge, 495 ft³/s, Sept. 28, 1970; minimum elevation, 101.72 ft, Nov. 2, 1981.

DISCHARGE, CUBIC FEET PER SECOND
YEAR 2019-10-01 to 2020-09-30
DAILY MEAN VALUES

Day	Oct
	2019
1	1,990
2	1,370
3	886
4	865
5	816
6	837
7	840
8	826
9	1,040
10	992
11	802
12	766
13	788
14	766
15	837
16	830
17	922
18	922
19	908
20	918
21	985
22	996
23	1,040
24	982
25	1,050
26	1,050
27	1,020
28	999
29	929
30	936
31	943
Total	29,850
Mean	963
Max	1990
Min	766
Ac-ft	59,209

Day	Nov
2019
1	1,080
2	1,090
3	1,090
4	1,090
5	1,090
6	1,090
7	1,130
8	1,110
9	1,120
10	1,130
11	1,370
12	1,480
13	1,420
14	1,440
15	1,440
16	1,410
17	1,410
18	1,430
19	1,400
20	1,760
21	2,660
22	4,560
23	3,350
24	2,550
25	1,680
26	1,440
27	1,420
28	1,530
29	2,750
30	2,910
--
Total	50,430
Mean	1,681
Max	4560
Min	1080
Ac-ft	100,000

Day	Dec
2019
1	2,220
2	1,670
3	1,640
4	1,920
5	2,000
6	1,540
7	1,450
8	1,370
9	1,140
10	1,110
11	1,090
12	1,090
13	1,090
14	1,060
15	1,060
16	1,050
17	1,060
18	1,060
19	1,070
20	1,060
21	1,080
22	1,060
23	968
24	936
25	961
26	954
27	975
28	929
29	911
30	932
31	939
Total	37,400
Mean	1,206
Max	2220
Min	911
Ac-ft	74,170

Day	Jan
2020
1	1,100
2	1,140
3	1,150
4	1,260
5	1,260
6	1,110
7	1,110
8	1,100
9	1,110
10	1,120
11	1,110
12	1,130
13	1,330
14	1,290
15	1,290
16	1,260
17	1,410
18	1,450
19	1,500
20	1,460
21	1,580
22	1,620
23	1,650
24	1,750
25	1,940
26	1,680
27	1,700
28	1,660
29	1,700
30	1,680
31	1,670
Total	43,320
Mean	1,397
Max	1940
Min	1100
Ac-ft	85,920

Day	Feb
2020
1	1,840
2	1,820
3	1,860
4	1,890
5	1,890
6	1,870
7	1,890
8	1,950
9	1,950
10	2,020
11	3,510
12	3,420
13	2,830
14	2,160
15	2,070
16	2,040
17	2,040
18	2,040
19	2,040
20	2,000
21	2,210
22	2,260
23	2,260
24	2,220
25	2,090
26	2,160
27	2,160
28	2,120
29	2,130
--
--
Total	62,739
Mean	2,163
Max	3510
Min	1820
Ac-ft	124,400

Day	Mar
2020
1	2,470
2	2,450
3	2,390
4	2,460
5	2,480
6	2,460
7	2,440
8	2,430
9	2,370
10	2,390
11	3,340
12	5,540
13	7,520
14	7,100
15	2,530
16	2,680
17	2,840
18	2,760
19	2,700
20	2,540
21	2,540
22	2,570
23	2,580
24	2,650
25	2,730
26	2,720
27	2,600
28	2,530
29	2,600
30	2,640
31	2,550
Total	92,600
Mean	2,987
Max	7520
Min	2370
Ac-ft	183,700

Day	Apr
2020
1	2,380
2	3,060
3	3,850
4	3,600
5	3,030
6	3,330
7	3,170
8	4,030
9	3,570
10	2,650
11	2,730
12	2,690
13	2,570
14	2,600
15	2,560
16	2,560
17	2,520
18	2,540
19	2,560
20	2,450
21	2,170
22	2,160
23	2,170
24	2,170
25	2,460
26	2,000
27	1,950
28	1,940
29	2,030
30	2,440
--
Total	79,940
Mean	2,665
Max	4030
Min	1940
Ac-ft	158,600

Day	May
2020
1	2,940
2	2,570
3	2,010
4	1,820
5	1,820
6	1,840
7	1,830
8	1,850
9	1,830
10	1,850
11	1,840
12	1,850
13	1,860
14	1,840
15	1,860
16	1,850
17	1,860
18	1,850
19	1,840
20	1,830
21	1,770
22	1,770
23	1,820
24	1,840
25	1,840
26	1,840
27	1,830
28	1,830
29	1,830
30	1,820
31	1,820
Total	58,850
Mean	1,898
Max	2940
Min	1770
Ac-ft	116,700

Day	Jun
2020
1	2,040
2	2,050
3	2,040
4	2,080
5	2,110
6	2,140
7	2,140
8	2,140
9	2,150
10	2,140
11	2,130
12	2,090
13	2,080
14	2,080
15	2,130
16	2,150
17	2,150
18	2,150
19	2,150
20	2,170
21	2,210
22	2,180
23	2,200
24	2,340
25	2,190
26	2,170
27	2,230
28	2,340
29	2,240
30	2,220
--
Total	64,630
Mean	2,154
Max	2340
Min	2040
Ac-ft	128,200

Day	Jul
2020
1	2,270
2	2,300
3	2,300
4	2,330
5	2,320
6	2,320
7	2,330
8	2,310
9	2,320
10	2,310
11	2,310
12	2,330
13	2,300
14	2,260
15	2,370
16	2,430
17	2,410
18	2,290
19	2,260
20	2,280
21	2,350
22	2,300
23	2,290
24	2,240
25	2,290
26	2,300
27	2,280
28	2,310
29	2,310
30	2,440
31	2,230
Total	71,690
Mean	2,313
Max	2440
Min	2230
Ac-ft	142,200

Day	Aug
2020
1	1,890
2	1,900
3	1,920
4	1,950
5	1,940
6	1,940
7	1,930
8	1,960
9	1,940
10	1,940
11	1,960
12	1,990
13	2,400
14	2,050
15	1,860
16	1,890
17	1,920
18	1,890
19	2,390
20	2,130
21	1,880
22	1,860
23	1,850
24	1,870
25	1,910
26	1,950
27	1,820
28	1,820
29	1,850
30	1,880
31	1,890
Total	60,370
Mean	1,947
Max	2400
Min	1820
Ac-ft	119,700

Day	Sep
2020
1	1,670
2	1,680
3	1,720
4	1,740
5	1,800
6	1,790
7	1,760
8	1,690
9	1,750
10	1,770
11	1,700
12	1,700
13	1,700
14	1,720
15	1,640
16	1,650
17	1,630
18	1,880
19	1,870
20	1,880
21	1,840
22	1,720
23	1,680
24	1,660
25	1,650
26	1,660
27	1,670
28	1,650
29	1,530
30	1,770
--
Total	51,570
Mean	1,719
Max	1880
Min	1530
Ac-ft	102,300

STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1950 - 2020, BY WATER YEAR (WY)
	Oct	Nov	Dec	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep
Mean	2,867	3,106	3,850	4,496	4,284	4,824	4,550	3,380	3,678	4,202	4,117	3,454
Max	31,879	25,750	23,760	25,490	24,040	21,650	18,020	18,160	22,210	30,380	32,770	31,150
(WY)	(1984)	(1984)	(1984)	(1984)	(1984)	(1993)	(1984)	(1986)	(1984)	(1983)	(1983)	(1983)
Min	699	696	904	1,002	1,088	1,744	2,595	1,161	1,340	1,479	1,308	905
(WY)	(1971)	(1972)	(1997)	(1966)	(1957)	(1957)	(1973)	(1972)	(2016)	(2016)	(2015)	(1970)

SUMMARY STATISTICS
	Water Year 2020		Water Years 1950 - 2020
Annual total	703,400
Annual mean	1,922		3,869
Highest annual mean			22,860	1984
Lowest annual mean			1,726	1973
Highest daily mean	7,520	Mar 13	39,200	Aug 19, 1983
Lowest daily mean	766.0	Oct 12	567.0	Sep 18, 1971
Annual 7-day minimum	815.9	Oct 11	579.1	Sep 18, 1971
Maximum peak flow
Maximum peak stage
Annual runoff (cfsm)	0.008		0.016
Annual runoff (inches)	0.106		0.215
10 percent exceeds	2,573		9,668
50 percent exceeds	1,885		2,320
90 percent exceeds	1,047		1,110

USGS Water-data graph for site USGS 09522000