05446500 DATA: Discharge Tables, 2004

Station list Available data
ROCK RIVER BASIN

05446500 ROCK RIVER NEAR JOSLIN, IL


LOCATION.-- Lat 41°33'21", long 90°11'08" (NAD of 1927), in NE1/4NE1/4 sec.18, T.18 N., R.3 E., Rock Island County, Hydrologic Unit 07090005, near center of span on downstream side of bridge on State Highway 92, 1.8 mi east of Joslin, 14.5 mi downstream from Rock Creek, and at mile 26.9.

DRAINAGE AREA.-- 9,549 mi².

PERIOD OF RECORD.--
SURFACE-WATER DISCHARGE AND STAGE
	DISCHARGE: October 1939 to current year.
	STAGE: Water years 1994 to current year.
SURFACE-WATER QUALITY
	CHEMICAL: Water years 1975-94.
	SEDIMENT: May 1980 to September 1982.
	SPECIFIC CONDUCTANCE: Water years 1976-81.
	WATER TEMPERATURE: Water years 1976-81.

REVISED RECORDS.-- WDR IL-79-1: Drainage area.

GAGE.-- Water-stage recorder, U.S. Army Corps of Engineers satellite telemeter and crest-stage gage. Datum of gage is 564.06 ft above NGVD of 1929 (levels by U.S. Army Corps of Engineers). Prior to Apr. 6, 1940, nonrecording gage at same site and datum.

REMARKS.-- Some diurnal fluctuation caused by powerplants upstream from station.

EXTREMES FOR PERIOD OF RECORD.--
SURFACE-WATER DISCHARGE AND STAGE: Maximum discharge, 47,700 ft³/s, June 7, 2002, gage height, 19.24 ft., minimum daily discharge, 834 ft³/s, Jan. 3, 1940.
SUSPENDED-SEDIMENT CONCENTRATION: Maximum daily mean, 1,210 mg/L June 14, 1981; minimum daily mean, 17 mg/L Feb. 9, 1981.
SUSPENDED-SEDIMENT LOADS: Maximum daily, 48,000 tons Apr. 5, 1982; minimum daily, 131 tons Feb. 9, 1981.

REMARKS FOR CURRENT YEAR.-- Records good except those for May 26 to July 2, which are fair, and estimated daily discharges, which are poor.

Discharge, cubic feet per second, WATER YEAR OCTOBER 2003 TO SEPTEMBER 2004 DAILY MEAN VALUES
DAY	OCT	NOV	DEC	JAN	FEB	MAR	APR	MAY	JUN	JUL	AUG	SEP

1	1950	2770	4980	5410	e2400	7060	13200	6400	24200	15300	7010	5020
2	2010	2860	5070	5420	e2500	7020	12800	6550	26900	14700	6850	5320
3	1930	3050	4910	5150	e2650	7480	12300	6480	28400	14200	6710	5200
4	1870	3670	4680	5300	e2820	7520	11700	6290	28500	13800	6990	4610
5	2050	3960	4650	5080	e3050	7830	11000	5870	27800	14000	7490	4720

6	2030	5010	4820	5190	e3290	9680	10300	6060	26800	14400	7520	4560
7	1970	5110	4760	e4700	e3480	11400	9850	5630	24900	14500	6700	4380
8	1930	5730	4620	e3300	e3550	11800	9340	5500	23200	14200	6930	4340
9	1940	5640	4650	e2800	e3600	11500	9050	5210	22100	13800	6800	4010
10	1900	5980	5290	e3800	e3400	11300	8740	5180	21000	14100	6550	4180

11	1950	5950	7400	e4400	e3200	10800	8300	5080	20700	14100	6300	3820
12	2050	5490	8080	e4000	e3100	10500	8030	5070	20000	13400	5910	3620
13	2000	4870	8040	e4500	e3000	9840	7670	5850	20900	12800	5980	3580
14	2070	5000	7680	e4400	e2900	9070	7600	6930	23600	12000	6060	3430
15	2100	4440	7370	e4200	e2850	8930	7310	7420	25800	11800	5390	3520

16	2160	4650	7000	e4000	e2800	8620	7070	8850	25400	11200	5450	3680
17	2330	4780	6620	e3700	e2800	8400	6940	9490	23600	10800	4600	3780
18	2320	4400	7060	e4000	e2850	8290	6800	9980	21800	10500	4920	3650
19	2290	4650	6600	e4100	e2900	8170	6510	11500	20800	10400	4770	3370
20	2380	4580	6070	e3700	e2950	8020	6720	11700	20300	10200	4660	3850

21	2460	4910	5430	e3300	e3000	7950	6590	11300	19700	9900	4320	3570
22	2390	5290	5570	e3000	e3200	7950	7120	11300	19700	9790	4570	3540
23	2420	4650	6330	e2600	e3900	7780	7400	14700	20200	9990	4130	3450
24	2350	4990	6020	e2400	e4600	7880	7450	18800	19800	9770	4100	3150
25	2250	4790	5660	e2500	e5400	8590	7740	21100	19100	9510	4090	3140

26	2360	4690	5200	e2700	e6400	9570	7660	22200	18400	9080	3810	3090
27	2430	4310	4990	e2800	e7000	10900	7650	22700	17800	8620	3770	2950
28	2480	4560	5090	e2700	e7200	12000	7420	22000	17200	8380	4750	3030
29	2390	5350	5080	e2450	e7100	12600	7030	21300	16800	7810	5660	3370
30	2450	5240	5190	e2400	---	12900	6850	21300	16000	7670	5680	3130

31	2710	---	5220	e2370	---	13300	---	22500	---	7120	5230	---

TOTAL	67920	141370	180130	116370	107890	294650	254140	350240	661400	357840	173700	115060
MEAN	2191	4712	5811	3754	3720	9505	8471	11300	22050	11540	5603	3835
MAX	2710	5980	8080	5420	7200	13300	13200	22700	28500	15300	7520	5320
MIN	1870	2770	4620	2370	2400	7020	6510	5070	16000	7120	3770	2950
CFSM	0.23	0.49	0.61	0.39	0.39	1.00	0.89	1.18	2.31	1.21	0.59	0.40
IN.	0.26	0.55	0.70	0.45	0.42	1.15	0.99	1.36	2.58	1.39	0.68	0.45

e Estimated

STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1940 - 2004, BY WATER YEAR (WY)
MEAN	4549	5176	5012	5183	6365	10690	10700	8616	7832	5921	4409	4196
MAX	17110	16700	14780	15820	14520	22500	26950	26030	26810	24000	12420	13470
(WY)	1987	1986	1983	1973	2001	1948	1993	1973	2000	1993	1993	1972
MIN	1381	1626	1519	1172	1554	2803	3877	2032	2052	1902	1349	1084
(WY)	1957	1950	1959	1940	1940	1954	1940	1958	1977	1965	1958	1958

SUMMARY STATISTICS	FOR 2003 CALENDAR YEAR		FOR 2004 WATER YEAR		WATER YEARS 1940 - 2004
ANNUAL TOTAL	1444070		2820710
ANNUAL MEAN	3956		7707		6551
HIGHEST ANNUAL MEAN					14560	1993
LOWEST ANNUAL MEAN					2587	1964
HIGHEST DAILY MEAN	10700	May 16	28500	Jun 4	46100	Jun 7 2002
LOWEST DAILY MEAN	1560	Sep 11	1870	Oct 4	834	Jan 3 1940
ANNUAL SEVEN-DAY MINIMUM	1650	Sep 6	1960	Oct 4	977	Jan 1 1940
MAXIMUM PEAK FLOW			28600	Jun 3	47700	Jun 7 2002
MAXIMUM PEAK STAGE			15.04	Jun 3	19.24	Jun 7 2002
INSTANTANEOUS LOW FLOW			1790	Oct 4
ANNUAL RUNOFF (CFSM)	0.414		0.807		0.686
ANNUAL RUNOFF (INCHES)	5.63		10.99		9.32
10 PERCENT EXCEEDS	6480		16900		12900
50 PERCENT EXCEEDS	3630		5650		4990
90 PERCENT EXCEEDS	1980		2500		2010