05583000 DATA: Discharge Tables, 2000

ILLINOIS RIVER BASIN

05583000 SANGAMON RIVER NEAR OAKFORD, IL

LOCATION.-- Lat 40°07'26", long 89°59'06", in NW1/4SE1/4 sec.3, T.19 N., R.8 W., Mason County, Hydrologic Unit 07130008, on right bank at downstream side of bridge on State Highway 97, 300 ft upstream from a railroad bridge, 0.8 mi downstream from Crane Creek, 1.8 mi northwest of Oakford, and at mile 25.7.

DRAINAGE AREA.-- 5,093 mi².

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

DISCHARGE: October 1909 to October 1911, December 1911 to March 1912, August 1914 to June 1919, March 1921 to September 1922, October 1928 to December 1933, October 1939 to current year. Monthly discharge only for some periods, published in WSP 1308.

STAGE: Water years 1994-2000.

SURFACE-WATER QUALITY

CHEMICAL: Water years 1978-94 and 1998.

SEDIMENT: Water years 1981, 1983-86, 1995-97.

SPECIFIC CONDUCTANCE: Water years 1979-81.

WATER TEMPERATURE: Water years 1976-77, 1979-81.

MISCELLANEOUS: Contaminants in streambed sediments, August 1996; contaminants in fish tissue, August 1996; streambank sediment size, October 1997; streambed sediment size, October 1997.

BIOLOGICAL: Algae, water year 1981; benthic macroinvertebrates, September 1996; fish, July 1997.

REVISED RECORDS.-- WSP 715: 1922(M). WSP 1175: 1912(M). WDR IL-75-1: Drainage area.

GAGE.-- Water-stage recorder, U.S. Army Corps of Engineers satellite telemeter and rain gage, and artificial control. Datum of gage is 452.88 ft above sea level (U.S. Army Corps of Engineers bench mark). Prior to Jan. 1, 1934, nonrecording gage at site 2.4 mi upstream at datum 458.66 ft above sea level. Oct. 1, 1939, to May 14, 1940, nonrecording gage at present site at sea level.

EXTREMES FOR PERIOD OF RECORD.--
SURFACE-WATER DISCHARGE AND STAGE: Maximum discharge, 123,000 ft³/s, May 20, 1943, gage height, 25.63 ft.
SUSPENDED-SEDIMENT CONCENTRATIONS: Maximum daily, 3,540 mg/L, June 9, 1984; minimum daily, 1 mg/L, Dec. 7, 8, 1996, Jan. 11, 1997.
SUSPENDED-SEDIMENT LOADS: Maximum daily, 120,000 tons, Feb. 24, 1985; minimum daily, 1.6 tons, Dec. 7, 1996.

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

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1999 TO SEPTEMBER 2000 DAILY MEAN VALUES
DAY	OCT	NOV	DEC	JAN	FEB	MAR	APR	MAY	JUN	JUL	AUG	SEP

1	566	364	358	411	e300	580	982	1410	3470	5440	1060	595
2	501	369	363	409	e310	562	872	1390	3290	4490	1080	565
3	493	374	367	398	e320	663	830	1390	2970	3890	1010	540
4	484	373	370	401	e330	650	802	1460	2490	3490	955	518
5	532	367	424	410	e340	627	791	1460	2300	4490	975	499

6	492	360	559	405	e350	619	732	1290	1950	6240	1320	484
7	451	357	665	402	358	606	716	1130	1830	6720	1250	477
8	442	362	579	417	359	617	711	1030	1770	6370	1390	472
9	432	376	533	414	366	593	748	993	1770	5450	1350	464
10	506	382	493	415	383	548	732	1030	1570	4680	1230	460

11	550	378	476	419	416	513	865	1090	1440	5180	1090	459
12	543	371	477	400	435	500	862	1060	1630	4640	969	459
13	498	366	448	383	446	495	764	1130	1830	4320	870	518
14	460	360	438	374	438	501	720	1190	2380	4090	798	598
15	442	356	437	369	438	506	679	1250	2280	3710	741	527

16	425	356	443	364	413	522	660	1260	2320	3120	697	526
17	413	359	444	379	404	712	660	1390	2480	2680	671	496
18	412	366	474	365	480	667	681	1380	2270	2410	652	481
19	413	361	456	360	657	641	707	1160	1800	2250	893	475
20	414	356	439	e320	961	820	908	1260	1810	2100	821	464

21	418	353	e420	e300	1020	1140	1210	1180	9080	1950	764	466
22	398	351	e400	e280	900	1440	1940	1210	12100	1750	691	473
23	389	355	e390	e270	794	1640	1690	1210	10400	1590	652	457
24	385	362	e390	e260	742	1720	1470	1110	8550	1460	764	456
25	383	367	e400	e250	707	1460	1790	1000	8930	1310	991	513

26	375	391	e380	e240	683	1180	2270	1040	9810	1310	885	607
27	370	379	e360	e250	621	1040	2360	1580	9740	1250	728	654
28	367	366	e360	e260	596	1040	2300	2690	8770	1120	685	605
29	370	364	e370	e270	585	1230	2000	2730	7700	1060	692	695
30	366	360	394	e280	---	1180	1620	3530	6560	1110	677	868

31	357	---	400	e290	---	1090	---	3850	---	1100	634	---

TOTAL	13647	10961	13507	10765	15152	26102	34072	45883	135290	100770	27985	15871
MEAN	440	365	436	347	522	842	1136	1480	4510	3251	903	529
MAX	566	391	665	419	1020	1720	2360	3850	12100	6720	1390	868
MIN	357	351	358	240	300	495	660	993	1440	1060	634	456
CFSM	.09	.07	.09	.07	.10	.17	.22	.29	.89	.64	.18	.10
IN.	.10	.08	.10	.08	.11	.19	.25	.34	.99	.74	.20	.12

e Estimated

STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1910 - 2000, BY WATER YEAR (WY)
MEAN	1260	1718	2517	3353	4340	5314	6356	6223	4813	2873	1635	1121
MAX	12180	13180	18250	19580	14010	19590	25140	30570	20730	11480	15000	13180
(WY)	1994	1986	1983	1950	1968	1979	1922	1943	1974	1981	1981	1993
MIN	118	98.1	102	78.9	186	287	526	598	699	302	184	70.0
(WY)	1915	1915	1915	1918	1931	1941	1931	1954	1988	1911	1922	1922

SUMMARY STATISTICS	FOR 1999 CALENDAR YEAR		FOR 2000 WATER YEAR		WATER YEARS 1910 - 2000
ANNUAL TOTAL	1321953		450005
ANNUAL MEAN	3622		1230		3457
HIGHEST ANNUAL MEAN					8523	1993
LOWEST ANNUAL MEAN					516	1954
HIGHEST DAILY MEAN	15000	Jun 15	12100	Jun 22	120000	May 20 1943
LOWEST DAILY MEAN	351	Nov 22	240 A	Jan 26	45 B	C
ANNUAL SEVEN-DAY MINIMUM	357	Nov 17	257	Jan 23	45	Jan 21 1918
INSTANTANEOUS PEAK FLOW			12500	Jun 22	123000	May 20 1943
INSTANTANEOUS PEAK STAGE			12.99	Jun 22	25.63	May 20 1943
ANNUAL RUNOFF (CFSM)	.71		.24		.68
ANNUAL RUNOFF (INCHES)	9.66		3.29		9.22
10 PERCENT EXCEEDS	10700		2430		8930
50 PERCENT EXCEEDS	1460		624		1600
90 PERCENT EXCEEDS	372		361		299

A - Estimated, but may have been less during period of ice effect Jan. 20 to Feb. 6.
B - Estimated.
C - Jan. 21-31, 1918.

Table of Contents

Introduction

Station Descriptions

Surface-Water Data

Ground-Water Data

Meteorological Data

Biological Data