USGS CD-ROM: Current Year Discharge

05573540 SANGAMON RIVER AT ROUTE 48 AT DECATUR, IL

LOCATION.--Lat 39°49'52", long 88°58'35", in NE¼NE¼ sec.21, T.16 N., R.2 E., Macon County, Hydrologic Unit 07130006, on right upstream side of bridge on State Highway 48 in Decatur, 1.2 mi downstream from Lake Decatur Dam, 2.5 mi upstream from Stevens Creek, and at mile 129.0.

DRAINAGE AREA.--938 mi².

PERIOD OF RECORD.--October 1982 to current year.

REVISED RECORDS.--WDR IL-94-2: 1992

GAGE.--Water-stage recorder and crest-stage gage. Datum of gage is 583.43 ft above sea level.

REMARKS.--Records fair. Flow regulated by Lake Decatur Dam, 1.2 mi upstream. Gage-height telemeter at station.

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1997 TO SEPTEMBER 1998 DAILY MEAN VALUES
DAY	OCT	NOV	DEC	JAN	FEB	MAR	APR	MAY	JUN	JUL	AUG	SEP

1	1.7	3.8	368	420	517	720	3190	2530	868	1750	159	.00
2	2.0	3.5	760	399	461	902	1860	2830	667	1480	158	.00
3	2.3	3.2	497	376	334	843	2000	5050	674	1320	86	.00
4	2.6	3.1	353	381	627	710	3320	7680	693	1750	48	.00
5	2.8	3.1	349	371	521	578	2920	6740	751	856	592	.00

6	3.0	4.4	281	424	395	701	2690	4420	627	842	497	.00
7	3.4	4.0	273	673	272	487	2280	4490	429	1220	323	.00
8	3.6	2.9	261	1580	264	518	1880	5800	410	1490	233	.00
9	4.5	2.2	277	2110	309	1070	1790	5900	891	1380	226	.00
10	4.9	1.9	331	1860	353	1740	1710	4470	1030	1180	135	.00

11	4.9	1.7	329	1920	407	1920	1440	4770	1570	902	37	.00
12	4.9	1.4	306	2140	394	1910	1360	4520	2540	489	5.8	.00
13	6.5	1.3	284	2090	386	1920	1540	3330	3310	593	31	.00
14	7.2	1.3	281	2000	429	1970	1480	3330	3140	630	4.1	.00
15	6.8	1.4	279	1690	430	1970	1340	2610	4910	461	121	.00

16	6.4	.92	269	940	690	1850	1530	1430	7760	357	285	.00
17	6.2	.21	254	545	812	2010	1220	1220	6560	306	26	.00
18	6.1	.31	252	584	935	3090	971	1160	5460	284	117	.00
19	6.0	.40	178	642	1420	4120	1120	610	8110	287	47	.00
20	5.7	.65	162	702	1270	4920	1110	962	7570	168	18	.00

21	5.6	1.1	164	742	1230	6840	881	1100	6060	80	4.9	.00
22	5.3	1.1	225	584	1200	7550	858	782	4010	288	2.1	.00
23	5.3	.59	261	435	1160	6530	839	1470	6710	662	1.5	.00
24	5.2	.28	259	425	935	5110	669	2440	4450	185	2.2	.00
25	5.0	.28	286	421	835	4500	473	3420	3110	117	.90	.21

26	6.6	.31	370	298	846	2860	594	2980	2860	270	.45	.35
27	6.5	1.0	460	348	708	2900	1090	2570	2720	251	.00	.54
28	5.1	7.8	465	429	728	4230	765	1340	2360	28	40	.92
29	4.4	14	467	442	---	5030	451	1210	1580	5.5	28	1.5
30	3.8	109	466	405	---	3870	562	972	2090	74	3.4	2.0

31	3.7	---	448	501	---	3490	---	737	---	197	.52	---

TOTAL	148.0	177.15	10215	26877	18868	86859	43933	92873	93920	19902.5	3232.87	5.52
MEAN	4.77	5.90	330	867	674	2802	1464	2996	3131	642	104	.18
MAX	7.2	109	760	2140	1420	7550	3320	7680	8110	1750	592	2.0
MIN	1.7	.21	162	298	264	487	451	610	410	5.5	.00	.00

STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1983 - 1998, BY WATER YEAR (WY)
MEAN	262	645	919	723	864	1226	1174	1595	934	409	123	139
MAX	2217	4041	2294	3087	2230	2802	3674	4027	3131	1947	515	1736
(WY)	1994	1986	1991	1993	1984	1998	1994	1995	1998	1993	1985	1993
MIN	.24	3.67	2.21	26.8	56.0	180	83.8	129	17.3	2.69	.33	.18
(WY)	1995	1983	1990	1990	1989	1996	1986	1988	1988	1989	1996	1998

SUMMARY STATISTICS	FOR 1997 CALENDAR YEAR		FOR 1998 WATER YEAR		WATER YEARS 1983 - 1998
ANNUAL TOTAL	160026.68		397011.04
ANNUAL MEAN	438		1088		751
HIGHEST ANNUAL MEAN					1511	1993
LOWEST ANNUAL MEAN					337	1989
HIGHEST DAILY MEAN	5000	Feb 27	8110	Jun 19	16400	Apr 15 1994
LOWEST DAILY MEAN	.00	Jan 17-19	.00	A	.00	B
ANNUAL SEVEN-DAY MINIMUM	.62	Nov 20	.00	Sep 1	.00	Oct 8 1988
INSTANTANEOUS PEAK FLOW			8930	Jun 19	17100 C	Apr 15 1994
INSTANTANEOUS PEAK STAGE			17.87	Jun 19	23.04 D	May 2 1983
10 PERCENT EXCEEDS	1170		3240		2160
50 PERCENT EXCEEDS	216		429		255
90 PERCENT EXCEEDS	2.8		.57		1.5

A - Many days.
B - Many days in most years.
C - Gage height, 21.12 ft.
D - Discharge, 12,400 ft³/s.