ARKANSAS RIVER BASIN

07134180 ARKANSAS RIVER NEAR GRANADA, CO

LOCATION.--Lat 38°05'44", long 102°18'37", in SE14NE14 sec.36, T.22 S., R.44 W., Prowers County, Hydrologic Unit 11020009, on left bank at upstream side of end of bridge on U.S. Highway 385, 1.2 mi downstream from headgate of Buffalo Canal, and 2.3 mi north of Granada.

DRAINAGE AREA.--23,707 mi2, of which 1,648 mi2 is probably noncontributing.

PERIOD OF RECORD.--January 1899 to December 1901 (gage heights only), August to October 1903 (monthly discharge only for some periods, published in WSP 1311), December 1980 to current year. For a complete listing of historical data available for this site, see http://waterdata.usgs.gov/co/nwis/inventory/?site_no=07134180

REVISED RECORDS.--WDR CO-01-1: Drainage area.

GAGE.--Water-stage recorder with satellite telemetry and crest-stage gage. Elevation of gage is 3,480 ft above NGVD of 1929, from topographic map. See WSP 1311 for history of changes prior to December 5, 1980.

REMARKS.--No estimated daily discharges. Records good. Natural flow of stream affected by storage reservoirs, power developments, transbasin and transmountain diversions, diversions for irrigation and municipal use, ground-water withdrawals, return flows from irrigated areas, and flows from sewage-treatment plants. Flow regulated by John Martin Reservoir (station 07130000) 38 mi upstream since October 1948. Several measurements of specific conductance and water temperature were obtained and are published in the "Supplemental Water-Quality Data For Gaging Stations" section of this report.

Discharge, cubic feet per second 

WATER YEAR OCTOBER 2002 TO SEPTEMBER 2003

DAILY MEAN VALUES

DAY	OCT	NOV	DEC	JAN	FEB	MAR	APR	MAY	JUN	JUL	AUG	SEP
1	7.3	4.0	27	36	40	49	3.9	8.1	3.5	11	3.3	3.1
2	6.6	3.9	28	36	40	48	3.7	10	3.5	17	3.2	3.1
3	6.6	3.7	27	36	41	49	3.7	10	9.2	40	3.2	3.0
4	6.4	3.8	30	36	41	49	3.6	4.1	25	13	3.2	3.0
5	6.6	3.6	29	36	40	49	3.6	3.7	65	7.7	3.3	3.0
6	4.8	3.4	30	36	40	48	3.5	3.6	77	4.5	3.2	3.0
7	4.9	3.5	30	36	40	47	3.3	3.6	93	4.1	3.3	3.2
8	4.9	3.6	30	37	40	50	3.4	3.4	96	4.1	3.2	3.3
9	5.0	3.6	31	36	42	53	3.5	3.4	82	4.0	3.2	3.4
10	5.1	3.5	31	35	43	54	3.6	3.2	95	4.0	3.2	3.4
11	5.5	3.4	32	36	43	52	3.7	3.2	88	4.1	3.2	3.2
12	5.2	3.4	32	37	44	49	3.7	3.3	83	3.9	3.1	3.3
13	5.2	3.4	32	37	44	47	3.8	3.2	81	3.7	3.0	3.2
14	5.2	3.3	32	37	46	46	3.7	3.2	80	3.7	3.1	3.4
15	5.1	3.3	32	37	44	46	4.1	3.6	78	3.4	3.2	3.6
16	5.1	3.2	32	37	44	47	3.8	3.4	42	3.2	3.1	3.6
17	5.1	14	34	37	45	26	3.8	3.3	11	3.1	3.1	3.5
18	5.2	23	33	38	44	6.7	4.0	3.4	64	3.0	3.1	3.2
19	5.1	24	31	39	44	30	4.0	3.3	123	3.0	3.1	3.2
20	5.0	25	32	39	44	50	5.2	3.3	142	2.9	3.1	3.3
21	4.9	25	32	38	45	49	8.0	3.5	111	3.0	3.6	3.4
22	4.9	25	32	37	46	48	8.8	3.5	84	3.1	3.4	4.3
23	4.5	25	32	34	46	32	7.5	3.6	63	3.1	3.2	3.1
24	4.4	24	33	38	45	7.7	7.0	3.7	27	3.2	3.1	3.0
25	4.7	24	33	39	43	6.8	7.3	3.9	26	3.2	3.1	3.1
26	4.6	25	33	37	46	6.3	8.6	3.7	23	3.1	3.0	3.2
27	4.4	25	34	39	48	5.5	8.6	3.6	27	3.1	3.0	3.1
28	4.3	26	36	39	49	4.8	9.3	3.6	21	3.2	3.0	3.1
29	4.5	27	37	39	---	4.5	9.2	3.5	19	3.5	3.5	3.3
30	4.1	26	36	39	---	4.5	8.7	4.0	13	3.4	3.2	3.1
31	4.0	---	35	40	---	6.9	---	3.8	---	3.4	3.1	---
TOTAL	159.2	394.6	988	1,153	1,217	1,071.7	158.6	126.7	1,755.2	178.7	98.6	97.7
MEAN	5.14	13.2	31.9	37.2	43.5	34.6	5.29	4.09	58.5	5.76	3.18	3.26
MAX	7.3	27	37	40	49	54	9.3	10	142	40	3.6	4.3
MIN	4.0	3.2	27	34	40	4.5	3.3	3.2	3.5	2.9	3.0	3.0
AC-FT	316	783	1,960	2,290	2,410	2,130	315	251	3,480	354	196	194
STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1981 - 2003, BY WATER YEAR (WY)
MEAN	85.0	99.3	125	138	130	122	188	307	403	449	266	111
MAX	184	306	479	886	495	608	1,138	2,470	2,196	2,144	775	430
(WY)	(1984)	(1998)	(1998)	(1998)	(1998)	(1998)	(1987)	(1999)	(1987)	(1995)	(1999)	(1984)
MIN	4.15	9.68	31.9	37.2	43.5	22.7	5.29	4.09	9.39	5.76	3.18	3.26
(WY)	(1993)	(1982)	(2003)	(2003)	(2003)	(1994)	(2003)	(2003)	(1981)	(2003)	(2003)	(2003)

SUMMARY STATISTICS	FOR 2002 CALENDAR YEAR	FOR 2003 WATER YEAR	WATER YEARS 1981 - 2003
ANNUAL TOTAL	17,660.0	7,399.0
ANNUAL MEAN	48.4	20.3	208
HIGHEST ANNUAL MEAN			597 1987
LOWEST ANNUAL MEAN			20.3 2003
HIGHEST DAILY MEAN	1,240 Aug 29	142 Jun 20	4,070 May 5, 1999
LOWEST DAILY MEAN	2.9 Aug 13	2.9 Jul 20	a2.7 Aug 17, 1990
ANNUAL SEVEN-DAY MINIMUM	3.1 Aug 13	3.0 Jul 17	3.0 Aug 14, 1990
MAXIMUM PEAK FLOW		151 Jun 20	b4,610 May 5, 1999
MAXIMUM PEAK STAGE		6.03 Jun 20	c12.28 May 5, 1999
ANNUAL RUNOFF (AC-FT)	35,030	14,680	150,600
10 PERCENT EXCEEDS	91	46	513
50 PERCENT EXCEEDS	18	5.5	102
90 PERCENT EXCEEDS	3.6	3.2	6.6

a Also occurred Aug 18-19, 1990; minimum daily for period of record, 1 ft3/s, many days in 1903. b From rating curve extended above 3,470 ft3/s. c Maximum gage height, 12.38 ft, May 27, 1996.