05576000 DATA: Discharge Tables, 2001

Station list Available data
ILLINOIS RIVER BASIN

05576000 SOUTH FORK SANGAMON RIVER NEAR ROCHESTER, IL

LOCATION.-- Lat 39°44'32", long 89°34'02", in NE1/4NW1/4 sec.20, T.15 N., R.4 W., Sangamon County, Hydrologic Unit 07130007, on right bank at city of Springfield dam, 100 ft downstream from Horse Creek, 1.7 mi southwest of Rochester, and at mile 7.4.

DRAINAGE AREA.-- 867 mi².

PERIOD OF RECORD.--
SURFACE-WATER DISCHARGE AND STAGE

DISCHARGE: July 1949 to current year.

STAGE: Water years 1994-2001.

REVISED RECORDS.-- WDR IL-75-1: Drainage area.

GAGE.-- Water-stage recorder, U.S. Army Corps of Engineers satellite telemeter and rain gage, and crest-stage gage. Datum of gage is 511.30 ft above sea level. Prior to Oct. 1, 1964, water-stage recorder, and Oct. 1, 1964, to Apr. 12, 1966, non-recording gage, at site 1.8 mi downstream at same datum. Auxiliary water-stage recorder at site 1.2 mi downstream. Prior to May 19, 1950, auxiliary non-recording gage at site 6.2 mi downstream. May 19, 1950 to Apr. 29, 1975, auxiliary non-recording gage at site 1.2 mi downstream.

REMARKS.-- Beginning Apr. 14, 1955, diversion for Springfield's public-water supply periodically occurs upstream from the station and upstream from the dam between the confluence of Horse Creek and the gage. Occasional regulation caused by operation of gate at diversion dam.

EXTREMES FOR PERIOD OF RECORD.--
SURFACE-WATER DISCHARGE AND STAGE: Maximum discharge, 20,300 ft³/s, Apr. 14, 1994, gage height, 32.40 ft; no flow Nov. 4-6, 1985, Sept. 9, 1987, and for many days in 1988-90, 92, and 2000.

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

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 2000 TO SEPTEMBER 2001 DAILY MEAN VALUES
DAY	OCT	NOV	DEC	JAN	FEB	MAR	APR	MAY	JUN	JUL	AUG	SEP

1	360	e230	636	e240	2810	4730	351	206	341	114	2.1	3.9
2	271	e220	559	e230	2970	4330	340	198	416	e103	1.4	31
3	215	e210	502	e230	3040	3610	312	194	422	95	1.2	29
4	178	e200	465	e240	2910	2800	287	192	730	89	1.3	4.6
5	548	e200	e400	e250	2550	2060	265	181	1660	84	1.0	2.6

6	2150	e200	e340	e260	1930	1530	263	171	3250	76	2.1	2.7
7	3790	e300	e280	e270	1270	1160	260	172	6610	75	2.3	2.9
8	4080	668	e310	e270	990	972	259	164	5320	69	2.2	1.9
9	4970	879	e330	e260	1170	813	266	161	6310	62	1.8	44
10	5620	1030	e320	e260	1650	711	244	158	7290	60	1.8	75

11	5260	1130	e310	e250	1820	647	1590	169	6670	53	1.6	82
12	4390	1160	e360	e250	1920	596	1760	156	5460	46	1.3	34
13	3420	1210	e400	e260	1940	554	1450	146	4230	41	1.9	26
14	2130	1310	e450	e280	2030	511	1520	135	3020	36	2.0	34
15	1300	1370	e500	e350	2160	488	1590	129	2090	32	1.8	30

16	917	1350	e600	e500	2110	635	1520	124	1290	29	1.8	27
17	787	1290	e550	e700	1980	898	1160	117	842	28	1.8	64
18	711	1170	e500	e800	1790	1040	793	163	640	13	1.7	39
19	642	1010	e470	e840	1670	1080	607	550	519	1.9	1.7	13
20	565	837	e440	e740	1520	1130	532	670	419	2.1	2.1	28

21	474	703	e410	e600	1310	1050	525	545	341	1.9	2.1	31
22	441	617	e380	e550	1050	896	507	500	300	1.8	2.2	24
23	403	559	e350	e500	883	794	480	465	270	1.5	2.4	20
24	370	515	e330	e460	1200	685	398	390	247	1.3	38	19
25	e340	488	e320	e420	3070	592	345	316	225	1.2	87	16

26	e320	487	e310	e390	4190	521	292	270	200	1.4	17	13
27	e300	516	e290	e370	3870	472	261	271	176	1.5	5.3	12
28	e280	607	e280	e350	4440	413	248	318	154	1.4	5.0	10
29	e270	684	e270	e700	---	406	246	304	136	1.2	5.0	8.8
30	e250	699	e250	e2000	---	392	222	266	124	1.9	3.7	7.6

31	e240	---	e240	e2900	---	361	---	268	---	2.3	3.5	---

TOTAL	45992	21849	12152	16720	60243	36877	18893	8069	59702	1126.4	206.1	736.0
MEAN	1484	728	392	539	2152	1190	630	260	1990	36.3	6.65	24.5
MAX	5620	1370	636	2900	4440	4730	1760	670	7290	114	87	82
MIN	178	200	240	230	883	361	222	117	124	1.2	1.0	1.9
CFSM	1.71	.84	.45	.62	2.48	1.37	.73	.30	2.30	.04	.01	.03
IN.	1.97	.94	.52	.72	2.58	1.58	.81	.35	2.56	.05	.01	.03

e Estimated

STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1949 - 2001, BY WATER YEAR (WY)
MEAN	198	262	524	588	888	1024	1047	936	855	381	242	138
MAX	2748	2846	4546	3788	4273	3669	3991	4482	3600	3053	3046	2876
(WY)	1970	1986	1968	1950	1982	1978	1994	1996	1974	1957	1958	1993
MIN	1.06	.67	.19	.75	3.04	.053	2.80	17.9	3.20	1.74	1.02	1.13
(WY)	1989	1977	1977	1990	2000	2000	2000	1954	1988	1954	1964	1987

SUMMARY STATISTICS	FOR 2000 CALENDAR YEAR		FOR 2001 WATER YEAR		WATER YEARS 1949 - 2001
ANNUAL TOTAL	111156.26		282565.5
ANNUAL MEAN	304		774		589
HIGHEST ANNUAL MEAN					1345	1973
LOWEST ANNUAL MEAN					26.3	1954
HIGHEST DAILY MEAN	5620	Oct 10	7290	Jun 10	19000	Apr 14 1994
LOWEST DAILY MEAN	.00	A	1.0	Aug 5	.00	B
ANNUAL SEVEN-DAY MINIMUM	.00	Mar 7	1.4	Jul 23	.00	Jun 9 1988
MAXIMUM PEAK FLOW			7400	Jun 10	20300	Apr 14 1994
MAXIMUM PEAK STAGE			26.64	Jun 10	32.40	Apr 14 1994
INSTANTANEOUS LOW FLOW			.93	Aug 3,5
ANNUAL RUNOFF (CFSM)	.35		.89		.68
ANNUAL RUNOFF (INCHES)	4.77		12.12		9.23
10 PERCENT EXCEEDS	750		2040		1570
50 PERCENT EXCEEDS	18		340		161
90 PERCENT EXCEEDS	.00		2.4		5.0

	A- Many days.
	B- Nov. 4-6, 1985, Sept. 9, 1987, many days in 1988-90,
	1992 and 2000.