05440700 DATA: Discharge Tables, 2002

Station list Available data
ROCK RIVER BASIN

05440700 ROCK RIVER AT BYRON, IL


LOCATION.-- Lat 42°07'23", long 89°15'21" (NAD of 1927), in NW1/4SW1/4 sec.32, T.25 N., R.11 E., Ogle County, Hydrologic Unit 7090005, at bridge on State Highway 72, 0.3 mi south of Byron, 1.2 mi upstream from Mill Creek, 1.3 mi downstream from Stillman Creek, and at mile 120.3.

DRAINAGE AREA.-- 7,990 mi².

PERIOD OF RECORD.--
SURFACE-WATER DISCHARGE AND STAGE
	DISCHARGE: May 2000 to current year.
	STAGE: Water years 2000-2002.
SURFACE-WATER QUALITY
	CHEMICAL: 1978-1988. Additional data for water years 1964, 1971-1977 are published in Water-Resources Investigations 78-23 and 79-24 as site P 14.

GAGE.-- Water-stage recorder, phone telemeter, and raingage. Datum of gage is 666.13 ft above NGVD of 1929.

EXTREMES FOR PERIOD OF RECORD.--
SURFACE-WATER DISCHARGE AND STAGE: Maximum discharge, 35,400 ft³/s, June 14, 2000, gage-height, 16.12 ft; minimum discharge, 2,300 ft³/s, Aug. 11, 2002.

REMARKS FOR CURRENT YEAR.-- Records good except those for estimated daily discharges, which are poor.

DISCHARGE, in CFS, WATER YEAR OCTOBER 2001 TO SEPTEMBER 2002 DAILY MEAN VALUES
DAY	OCT	NOV	DEC	JAN	FEB	MAR	APR	MAY	JUN	JUL	AUG	SEP

1	e6400	8230	6740	e4900	4600	7190	6830	7900	5580	5500	2710	3900
2	6160	7820	6480	e4900	4610	7170	6880	8140	5340	5090	2620	3820
3	5960	7540	6380	e4850	4540	6950	6960	8000	5410	4720	2560	4150
4	5570	7290	6340	e4800	4390	8680	6810	7890	20800	4460	2550	3770
5	5460	7090	6360	e4800	4430	8770	6670	7660	29600	4030	2630	3770

6	5310	6910	6160	e4800	4230	8170	6540	7510	22900	3970	2660	3700
7	5120	6700	5950	e4800	4300	7250	6590	7280	19800	3900	2690	3510
8	4970	6430	6000	e4800	4380	7220	7430	7200	18000	3890	2580	3290
9	4820	6300	5990	e4800	4360	9190	11100	7310	16800	3860	2560	3140
10	4860	6150	5940	e4800	4680	10900	13400	6920	15800	3380	2510	3000

11	4960	5960	5820	e4800	5660	10400	13300	6970	15000	3700	2380	2940
12	5090	5860	5790	e4800	5680	10600	12900	8220	13500	3480	2420	2890
13	5260	5830	6020	e4750	5630	10400	12500	9690	13000	3400	2650	2870
14	5810	6150	6170	e4700	5580	10100	12000	9970	12500	3080	2860	2810
15	6180	6270	6220	e4700	5410	10000	11300	9780	11900	3040	2990	2720

16	5960	6260	6250	e4750	5300	9370	10500	9130	11200	3100	3090	2720
17	5850	6290	6360	e4900	5130	9030	9850	8670	10600	3060	2990	2740
18	5640	6150	6390	e5000	5030	8850	9430	8720	9840	2900	2550	2800
19	5400	6020	6360	e4950	5110	8720	9230	8340	9230	2880	2370	2900
20	5280	5840	6270	e4650	5920	8470	8940	7820	8720	2930	2430	3320

21	5120	5740	6190	e4600	7360	8130	8810	7490	8200	2860	2510	3480
22	5130	5550	6370	e4750	8020	8120	8890	7110	8000	2760	8330	3220
23	7110	5520	6420	4610	8150	7880	8670	6880	7600	2800	11400	3160
24	9980	5930	6120	4560	8140	7660	8520	6560	7200	2800	9730	3030
25	11800	6750	6020	4560	8070	7570	8510	6580	6870	2810	8640	2910

26	11500	6660	e5030	4510	7890	7620	8050	6620	6780	2840	8170	2920
27	11300	6940	e4400	4490	7650	7340	7970	6310	6440	2910	7800	2910
28	10800	7000	e4300	4430	7570	7130	8420	6200	6210	2840	7340	2920
29	9970	6860	e5500	4410	---	7080	8390	6130	5950	2780	7190	3020
30	9170	6820	e5600	4390	---	7110	8120	6030	5690	2810	6100	3250

31	8680	---	e4900	4330	---	6960	---	5760	---	2740	4720	---

TOTAL	210620	194860	184840	145890	161820	260030	273510	234790	344460	105320	134730	95580
MEAN	6794	6495	5963	4706	5779	8388	9117	7574	11480	3397	4346	3186
MAX	11800	8230	6740	5000	8150	10900	13400	9970	29600	5500	11400	4150
MIN	4820	5520	4300	4330	4230	6950	6540	5760	5340	2740	2370	2720
CFSM	0.85	0.81	0.75	0.59	0.72	1.05	1.14	0.95	1.44	0.43	0.54	0.40
IN.	0.98	0.91	0.86	0.68	0.75	1.21	1.27	1.09	1.60	0.49	0.63	0.45

e Estimated

STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 2000 - 2002, BY WATER YEAR (WY)
MEAN	5659	5643	4660	4082	8128	9147	9447	8196	13900	5592	4236	4889
MAX	6794	6495	5963	4706	10480	9905	9777	8817	21220	8699	4685	5868
(WY)	2002	2002	2002	2002	2001	2001	2001	2001	2000	2000	2000	2000
MIN	4523	4791	3358	3458	5779	8388	9117	7574	9002	3397	3679	3186
(WY)	2001	2001	2001	2001	2002	2002	2002	2002	2001	2002	2001	2002

SUMMARY STATISTICS	FOR 2001 CALENDAR YEAR		FOR 2002 WATER YEAR		WATER YEARS 2000 - 2002
ANNUAL TOTAL	2562090		2346450
ANNUAL MEAN	7019		6429		6447
HIGHEST ANNUAL MEAN					6465	2001
LOWEST ANNUAL MEAN					6429	2002
HIGHEST DAILY MEAN	18400	Feb 12	29600	Jun 5	34700	Jun 14 2000
LOWEST DAILY MEAN	2720	Aug 1	2370	Aug 19	2370	Aug 19 2002
ANNUAL SEVEN-DAY MINIMUM	3130 A	Jan 1	2540	Aug 7	2540	Aug 7 2002
MAXIMUM PEAK FLOW			30800	Jun 5	35400	Jun 14 2000
MAXIMUM PEAK STAGE			14.72	Jun 5	16.12	Jun 14 2000
INSTANTANEOUS LOW FLOW			2300	Aug 11	2300	Aug 11 2002
ANNUAL RUNOFF (CFSM)	0.88		0.80		0.81
ANNUAL RUNOFF (INCHES)	11.93		10.92		10.96
10 PERCENT EXCEEDS	10700		9900		11200
50 PERCENT EXCEEDS	6480		6030		6010
90 PERCENT EXCEEDS	3400		2900		3160

A - Estimated due to backwater from ice.