05570000 DATA: Discharge Tables, 2000

ILLINOIS RIVER BASIN

05570000 SPOON RIVER AT SEVILLE, IL

LOCATION.-- Lat 40°29'24", long 90°20'25", in SE1/4NW1/4 sec.24, T.6 N., R.1 E., Fulton County, Hydrologic Unit 07130005, on left bank at downstream side of State Highway 95 bridge, 0.5 mi upstream from a railroad bridge, 0.5 mi northeast of Seville, 0.1 mi downstream from Shaw Creek, and at mile 39.2.

DRAINAGE AREA.-- 1,636 mi².

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

DISCHARGE: July 1914 to current year. Monthly discharge only for some periods, published in WSP 1308.

STAGE: Water years 1994-2000.

SURFACE-WATER QUALITY

CHEMICAL: Water years 1978-93.

SEDIMENT: Water years 1980-97.

REVISED RECORDS.-- WSP 1208: 1917, 1920, 1922, 1924, 1926-27, 1929(M). WSP 1308: 1919(M), 1936(M), 1938(M), 1942(M), 1945(M). 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 467.04 ft above sea level. Datum of gage was incorrectly published water years 1927-1941. Prior to May 9, 1935, nonrecording gage 0.5 miles downstream at same datum. May 9, 1935 to June 30, 1976, nonrecording gage 0.47 miles downstream at same datum. July 1, 1976, to July 13, 1983, recording gage at present site and datum. July 14, 1983 to Sept. 18, 2000, recording gage 0.47 miles downstream at same datum.

EXTREMES FOR PERIOD OF RECORD.--
SURFACE-WATER DISCHARGE AND STAGE: Maximum discharge, 37,300 ft³/s, Aug. 22, 1924, gage height, 30.77 ft, from graph based on gage readings; maximum gage height, 33.10 ft, July 26, 1993, discharge, 34,700 ft³/s; minimum observed discharge, 3.8 ft³/s, July 31, Aug. 27-29, 1914.
SUSPENDED-SEDIMENT CONCENTRATIONS: Maximum daily, 4,630 mg/L, July 21, 1996; minimum daily, 10 mg/L, Feb. 5, 6, 1996.
SUSPENDED-SEDIMENT LOADS: Maximum daily, 128,000 tons, May 27, 1996; minimum daily, 2.9 tons, Feb. 6, 1996.

EXTREMES OUTSIDE PERIOD OF RECORD.--
SURFACE-WATER DISCHARGE AND STAGE: Flood of 1883 reached a stage of about 33.0 ft, backwater from ice, discharge not determined.

REMARKS FOR CURRENT YEAR.-- Records fair 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	681	139	167	e230	e145	1680	603	893	4590	1860	449	136
2	427	135	168	e250	e150	1470	586	886	2660	1650	432	114
3	346	130	174	258	e160	1280	592	855	1810	1550	404	99
4	407	143	192	266	e170	1150	579	783	1520	1520	352	94
5	465	143	407	222	e180	1070	563	734	1430	1900	362	88

6	409	139	597	212	e190	998	538	713	1260	2430	361	82
7	340	137	675	265	e200	927	532	682	1110	2690	400	79
8	289	136	552	250	e210	866	552	658	1040	1890	478	76
9	248	141	441	266	e220	824	568	762	954	1520	428	75
10	224	149	369	250	e230	776	537	1000	895	1400	364	74

11	207	145	342	268	e250	722	520	1250	837	1870	312	74
12	189	140	345	277	e260	670	528	1150	855	1660	269	80
13	175	138	316	248	e270	643	516	1030	1010	1440	239	80
14	163	138	300	171	e280	628	490	921	1840	1270	221	94
15	159	139	281	193	e275	626	475	815	2870	1110	209	112

16	162	139	269	e220	e270	657	473	750	2370	1000	197	112
17	160	134	263	e200	264	667	496	773	1850	909	184	121
18	161	177	251	e190	363	614	532	781	1610	830	168	111
19	158	190	237	e240	481	603	540	736	1320	789	153	109
20	155	183	219	e170	525	716	602	777	1270	738	145	99

21	151	162	188	e180	474	926	892	1050	2070	696	138	98
22	151	156	e180	e190	478	988	2290	850	2750	651	134	97
23	146	144	e175	e180	502	913	2200	823	2020	601	131	471
24	150	142	e170	e170	658	855	1710	757	3620	555	128	1490
25	149	143	e170	e160	1000	829	1470	684	7600	518	143	767

26	149	150	e175	e155	2160	795	1300	630	8440	497	140	621
27	151	190	e180	e145	3260	770	1160	936	5690	473	126	488
28	150	185	e185	e140	2620	763	1070	1110	3220	453	116	374
29	142	182	e190	e135	1960	730	1010	1040	2510	431	111	279
30	144	173	e200	e135	---	674	942	869	2140	410	110	232

31	140	---	e210	e140	---	629	---	1210	---	416	150	---

TOTAL	7148	4542	8588	6376	18205	26459	24866	26908	73161	35727	7554	6826
MEAN	231	151	277	206	628	854	829	868	2439	1152	244	228
MAX	681	190	675	277	3260	1680	2290	1250	8440	2690	478	1490
MIN	140	130	167	135	145	603	473	630	837	410	110	74
CFSM	.14	.09	.17	.13	.38	.52	.51	.53	1.49	.70	.15	.14
IN.	.16	.10	.20	.14	.41	.60	.57	.61	1.66	.81	.17	.16

e Estimated

STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1914 - 2000, BY WATER YEAR (WY)
MEAN	542	615	670	1030	1409	1659	1858	1709	1591	1052	527	615
MAX	5356	4386	5745	5500	4387	6524	6752	8015	7908	7839	4767	8440
(WY)	1987	1986	1983	1916	1949	1985	1983	1995	1974	1993	1924	1926
MIN	26.5	24.9	26.8	17.7	44.2	188	89.7	29.1	88.0	30.1	6.46	17.9
(WY)	1957	1915	1915	1940	1989	1956	1956	1934	1934	1936	1914	1988

SUMMARY STATISTICS	FOR 1999 CALENDAR YEAR		FOR 2000 WATER YEAR		WATER YEARS 1914 - 2000
ANNUAL TOTAL	498446		246360
ANNUAL MEAN	1366		673		1104
HIGHEST ANNUAL MEAN					3578	1993
LOWEST ANNUAL MEAN					168	1989
HIGHEST DAILY MEAN	10600	Jan 27	8440	Jun 26	32800	Aug 23 1924
LOWEST DAILY MEAN	73	Sep 27	74	Sep 10, 11	3.8	Jul 31 1914
ANNUAL SEVEN-DAY MINIMUM	80	Sep 21	77	Sep 7	4.2	Aug 23 1914
INSTANTANEOUS PEAK FLOW			8650	Jun 26	37300 A	Aug 22 1924
INSTANTANEOUS PEAK STAGE			19.23	Jun 26	33.10 B	Jul 26 1993
INSTANTANEOUS LOW FLOW			72	Sep 11	3.8 C	D
ANNUAL RUNOFF (CFSM)	.83		.41		.67
ANNUAL RUNOFF (INCHES)	11.34		5.60		9.17
10 PERCENT EXCEEDS	3320		1520		2540
50 PERCENT EXCEEDS	700		406		481
90 PERCENT EXCEEDS	140		138		62

A - Gage height, 30.77 ft, from graph based on gage readings.
B - Discharge, 34,700 ft³/s.
C - Observed.
D - July 31, and Aug. 27-29, 1914.

Table of Contents

Introduction

Station Descriptions

Surface-Water Data

Ground-Water Data

Meteorological Data

Biological Data