05447500 DATA: Discharge Tables, 2004

Station list Available data
ROCK RIVER BASIN

05447500 GREEN RIVER NEAR GENESEO, IL


LOCATION.-- Lat 41°29'20", long 90°09'27" (NAD of 1927), in NE1/4SW1/4 sec.4, T.17 N., R.3 E., Henry County, Hydrologic Unit 07090007, on right bank at upstream side of bridge on State Highway 82, 1.4 mi upstream from Geneseo Creek, 2.4 mi north of Geneseo, and at mile 14.9.

DRAINAGE AREA.-- 1,003 mi².

PERIOD OF RECORD.--
SURFACE-WATER DISCHARGE AND STAGE
	DISCHARGE: March 1936 to current year.
	STAGE: Water years 1994 to current year.
SURFACE-WATER QUALITY
	SEDIMENT: March 1978 to September 1981.
	CHEMICAL: Water years 1978-91.

REVISED RECORDS.-- WSP 875: 1938. WSP 1508: 1937, 1939-41(M), 1946(P), 1947-49. WDR IL-74-1: Drainage area.

GAGE.-- Water-stage recorder, U.S. Army Corps of Engineers satellite telemeter and crest-stage gage. Datum of gage is 577.66 ft above NGVD of 1929 (levels by U.S. Army Corps of Engineers). Prior to Oct. 1, 1939, nonrecording gage at present site at datum 27.00 ft. lower. Oct. 1, 1939 to Apr. 3, 1940, nonrecording gage at present site at datum 3.0 ft. higher. Apr. 3, 1940 to Sept. 30, 1997, recording gage at present site at datum 3.0 ft. higher.

EXTREMES FOR PERIOD OF RECORD.--
SURFACE-WATER DISCHARGE AND STAGE: Maximum discharge, 12,100 ft³/s, June 22, 1974, gage height, 19.75 ft, present datum; maximum gage height, 21.59 ft, present datum, Jan. 23, 1969, ice jam; minimum daily discharge, 22 ft³/s, Jan. 18, 1977.
SUSPENDED-SEDIMENT CONCENTRATION: Maximum daily mean, 8,620 mg/L Apr. 14, 1981; minimum daily mean, 17 mg/L Jan. 15, 16, 1979.
SUSPENDED-SEDIMENT LOADS: Maximum daily, 132,000 tons Apr. 14, 1981; minimum daily, 7.3 tons Jan. 15, 16, 1979.

REMARKS FOR CURRENT YEAR.-- Records good except those for 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	70	80	135	366	e150	418	1090	499	5340	499	207	205
2	70	85	126	361	e160	424	1010	500	3910	475	200	180
3	71	152	127	356	e170	407	923	493	2930	461	202	164
4	71	211	131	e350	e180	403	854	473	2240	478	261	155
5	71	262	138	e347	e200	968	790	459	1810	452	304	140

6	71	243	141	e343	e210	1320	744	434	1550	565	233	131
7	70	185	139	e340	e220	1090	709	521	1370	553	207	126
8	69	159	134	e337	e210	927	672	602	1220	489	195	123
9	70	145	141	e333	e200	811	637	517	1100	445	184	121
10	71	138	1730	e330	e195	714	600	484	1080	462	175	117

11	71	134	2870	e327	e185	661	574	823	1670	452	172	117
12	70	133	1590	e323	e175	582	555	828	1610	426	170	111
13	71	118	1090	e320	e165	594	535	1020	1380	396	167	103
14	87	111	915	e317	e160	565	524	1290	1400	368	159	103
15	103	111	806	e313	e155	542	501	1670	1480	359	149	107

16	93	114	730	e300	e150	536	479	1720	1200	335	140	143
17	87	117	645	e340	e145	528	462	1340	1060	320	138	149
18	81	184	600	e300	e140	535	437	1500	962	308	159	114
19	78	246	559	e270	e220	541	426	1700	875	299	175	100
20	77	211	442	e240	e400	534	429	1460	812	288	169	96

21	74	188	471	e210	935	520	520	1350	785	293	151	95
22	73	173	520	e180	779	490	574	1290	788	294	138	91
23	73	169	491	e170	898	471	555	2130	746	305	129	90
24	74	161	424	e165	e700	485	522	2040	699	292	131	91
25	79	155	363	e160	e600	557	539	1710	663	282	144	90

26	80	154	374	e170	e520	892	555	1500	624	269	166	87
27	81	147	420	e180	e460	1300	539	1280	596	259	168	88
28	83	141	414	e170	e410	1200	506	1130	579	247	247	86
29	80	132	400	e160	410	1180	486	997	553	232	362	84
30	81	138	394	e155	---	1230	484	2150	525	219	303	84

31	82	---	381	e153	---	1140	---	5310	---	214	243	---

TOTAL	2382	4697	17841	8386	9502	22565	18231	39220	41557	11336	5948	3491
MEAN	76.8	157	576	271	328	728	608	1265	1385	366	192	116
MAX	103	262	2870	366	935	1320	1090	5310	5340	565	362	205
MIN	69	80	126	153	140	403	426	434	525	214	129	84
CFSM	0.08	0.16	0.57	0.27	0.33	0.73	0.61	1.26	1.38	0.36	0.19	0.12
IN.	0.09	0.17	0.66	0.31	0.35	0.84	0.68	1.45	1.54	0.42	0.22	0.13

e Estimated

STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1936 - 2004, BY WATER YEAR (WY)
MEAN	379	448	459	525	749	1020	1058	1004	924	560	379	331
MAX	2135	1790	1905	1976	2318	3244	3562	3500	3568	2946	1845	1777
(WY)	1999	1978	1983	1946	2001	1979	1973	1974	1974	1990	1987	1970
MIN	48.8	60.4	57.1	26.5	68.8	174	157	140	127	62.9	61.0	46.5
(WY)	1954	1954	1959	1977	1940	2003	2003	1989	1977	1940	1988	1940

SUMMARY STATISTICS	FOR 2003 CALENDAR YEAR		FOR 2004 WATER YEAR		WATER YEARS 1936 - 2004
ANNUAL TOTAL	112383		185156
ANNUAL MEAN	308		506		654
HIGHEST ANNUAL MEAN					1579	1993
LOWEST ANNUAL MEAN					159	1940
HIGHEST DAILY MEAN	3670	May 1	5340	Jun 1	10100	Mar 19 1979
LOWEST DAILY MEAN	59	Aug 28	69	Oct 8	22	Jan 18 1977
ANNUAL SEVEN-DAY MINIMUM	63	Aug 25	70	Oct 6	24	Jan 17 1977
MAXIMUM PEAK FLOW			5840	May 31	12100 A	Jun 22 1974
MAXIMUM PEAK STAGE			13.77	May 31	21.59 B	Jan 23 1969
INSTANTANEOUS LOW FLOW			68	C
ANNUAL RUNOFF (CFSM)	0.307		0.504		0.652
ANNUAL RUNOFF (INCHES)	4.17		6.87		8.86
10 PERCENT EXCEEDS	643		1200		1460
50 PERCENT EXCEEDS	147		325		384
90 PERCENT EXCEEDS	72		89		97

	A - Gage height, 19.75 ft., present datum.
	B - Present datum, due to backwater from ice, estimated discharge, 8000 ft³/s.
	C - Oct. 2, 7, 8.