05570000 DATA: Discharge Tables, 2001

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 1994-2001.

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 2000 TO SEPTEMBER 2001 DAILY MEAN VALUES
DAY	OCT	NOV	DEC	JAN	FEB	MAR	APR	MAY	JUN	JUL	AUG	SEP

1	201	201	343	e250	8380	5010	1430	1230	4260	1040	254	117
2	179	201	329	e260	7110	3240	1380	1180	4850	972	262	112
3	165	204	312	e270	5150	2800	1310	1130	3970	915	356	110
4	173	204	297	e280	4170	2530	1250	1060	3830	913	307	107
5	400	205	273	e290	3790	2310	1240	1000	4330	940	363	103

6	641	215	226	e300	3250	2090	1430	988	9380	882	263	103
7	614	254	e260	e310	3040	1930	1740	1150	10300	808	224	106
8	480	330	e330	e310	3810	1870	2300	1240	9790	739	203	106
9	384	452	e360	e300	10800	1800	2150	1170	8410	707	181	114
10	341	514	e350	e290	13300	1690	1890	1030	5090	683	172	125

11	316	632	e370	e280	16900	1630	2430	1490	3510	670	164	128
12	297	638	e400	e270	16000	1630	3210	2520	2950	608	154	140
13	278	559	e390	e270	14100	1650	3750	2520	2580	544	149	132
14	263	495	e370	e270	9290	1660	3290	2180	2310	504	143	120
15	260	454	e360	e290	5690	1710	2890	2810	2320	473	139	114

16	257	458	e350	e320	5180	2550	2660	2590	2180	445	142	105
17	252	471	e330	e350	3850	4570	2580	2930	1960	422	144	99
18	239	456	e310	e400	2930	4740	2420	5460	1750	439	140	113
19	228	432	e290	e380	2750	4100	2210	5030	1670	526	172	672
20	222	381	e280	e340	2560	3510	2120	3460	1590	535	168	615

21	215	328	e260	e310	2460	3070	2060	4120	2210	473	165	e520
22	207	388	e250	e280	2200	2750	2080	4480	2560	423	166	e400
23	205	414	e230	e270	2010	2480	1970	3830	2060	401	179	e320
24	204	492	e230	e260	3880	2220	1810	2960	1610	402	196	243
25	206	483	e220	e250	10200	2010	1680	2520	1360	381	176	215

26	208	415	e220	e250	12800	1830	1630	2290	1240	387	169	186
27	208	403	e210	e240	12700	1710	1570	2450	1180	333	150	161
28	206	392	e210	e240	10800	1640	1460	2810	1140	308	154	138
29	207	368	e220	e460	---	1580	1360	2560	1100	286	150	132
30	204	346	e230	e5200	---	1550	1270	2170	1070	269	132	126

31	201	---	e240	e6400	---	1490	---	2440	---	254	125	---

TOTAL	8461	11785	9050	20190	199100	75350	60570	74798	102560	17682	5862	5782
MEAN	273	393	292	651	7111	2431	2019	2413	3419	570	189	193
MAX	641	638	400	6400	16900	5010	3750	5460	10300	1040	363	672
MIN	165	201	210	240	2010	1490	1240	988	1070	254	125	99
CFSM	.17	.24	.18	.40	4.35	1.49	1.23	1.48	2.09	.35	.12	.12
IN.	.19	.27	.21	.46	4.53	1.71	1.38	1.70	2.33	.40	.13	.13

e Estimated

STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1914 - 2001, BY WATER YEAR (WY)
MEAN	539	612	665	1026	1474	1668	1860	1717	1612	1047	523	610
MAX	5356	4386	5745	5500	7111	6524	6752	8015	7908	7839	4767	8440
(WY)	1987	1986	1983	1916	2001	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 2000 CALENDAR YEAR		FOR 2001 WATER YEAR		WATER YEARS 1914 - 2001
ANNUAL TOTAL	255378		591190
ANNUAL MEAN	698		1620		1110
HIGHEST ANNUAL MEAN					3578	1993
LOWEST ANNUAL MEAN					168	1989
HIGHEST DAILY MEAN	8440	Jun 26	16900	Feb 11	32800	Aug 23 1924
LOWEST DAILY MEAN	74	Sep 10,11	99	Sep 17	3.8	Jul 31 1914
ANNUAL SEVEN-DAY MINIMUM	77	Sep 7	107	Sep 2	4.2	Aug 23 1914
MAXIMUM PEAK FLOW			17800	Feb 11	37300 A	Aug 22 1924
MAXIMUM PEAK STAGE			25.84	Feb 11	33.10 B	Jul 26 1993
INSTANTANEOUS LOW FLOW			98	Sep 17,18	3.8 C	D
ANNUAL RUNOFF (CFSM)	.43		.99		.68
ANNUAL RUNOFF (INCHES)	5.81		13.44		9.22
10 PERCENT EXCEEDS	1520		3860		2570
50 PERCENT EXCEEDS	440		473		481
90 PERCENT EXCEEDS	144		165		63

	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