USGS CD-ROM: Current Year Discharge

05466000 EDWARDS RIVER NEAR ORION, IL

LOCATION.--Lat 41°16'20", long 90°22'40", in NE¼SE¼ sec.21, T.15 N., R.1 E., Henry County, Hydrologic Unit 07080104, on left bank at downstream side of bridge on U.S. Highway 150, 1.5 mi north of Opheim, 5.5 mi south of Orion, and at mile 51.5.

DRAINAGE AREA.--155 mi².

PERIOD OF RECORD.--October 1940 to current year. Monthly discharge only for some periods, published in WSP 1308.

REVISED RECORDS.--WSP 1175: 1947(P). WSP 1508: 1942. WDR IL-75-1: Drainage area.

GAGE.--Water-stage recorder and crest-stage gage. Datum of gage is 653.96 ft above sea level (U.S. Army Corps of Engineers bench mark). Prior to Apr. 4, 1941, and Apr. 8 to Nov. 11, 1981, nonrecording gage at same site and datum.

REMARKS.--Records good except those for estimated daily discharges, which are poor. Gage-height telemeter at station.

EXTREMES OUTSIDE PERIOD OF RECORD.--Flood of August 1924 reached a stage of 20.2 ft, from floodmarks.

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	18	73	155	106	248	252	631	1110	103	268	35	17
2	18	68	134	114	424	222	434	516	102	210	34	16
3	17	64	130	498	308	205	343	378	93	181	32	15
4	17	58	129	711	257	187	292	312	92	209	36	14
5	16	56	116	680	218	173	260	272	88	160	35	14

6	16	124	107	597	191	166	241	394	83	174	31	13
7	15	147	99	1040	177	159	229	738	79	168	29	13
8	15	122	94	608	166	522	438	625	79	183	31	12
9	16	105	93	464	156	634	732	427	195	134	28	12
10	17	93	e89	372	152	379	489	344	169	120	27	12

11	15	84	e83	309	643	299	368	296	436	106	25	12
12	15	79	79	275	831	252	312	269	421	97	24	11
13	17	75	e72	234	449	241	435	241	269	89	23	11
14	17	72	e80	241	336	233	560	220	271	82	22	30
15	16	68	79	205	288	210	443	210	491	75	21	32

16	15	63	75	190	259	198	574	201	669	70	20	19
17	15	59	75	178	249	617	409	180	450	64	68	16
18	15	61	74	163	226	1830	330	173	421	61	483	15
19	15	58	76	164	203	1010	293	166	898	58	69	14
20	15	56	78	152	193	613	269	164	405	53	40	15

21	15	55	78	146	182	440	262	157	339	50	31	24
22	15	53	83	137	174	352	255	157	281	323	27	17
23	16	51	85	133	170	300	233	148	246	113	25	15
24	22	48	95	128	168	260	217	184	223	72	23	15
25	22	48	113	122	158	245	207	164	202	61	22	15

26	22	48	109	119	161	235	210	150	184	55	20	14
27	40	46	108	114	468	217	184	140	170	50	20	13
28	57	170	116	117	322	228	173	133	182	47	23	12
29	87	201	105	135	---	206	179	129	259	43	22	14
30	86	187	99	160	---	198	518	122	572	39	20	17

31	78	---	90	156	---	545	---	117	---	37	18	---

TOTAL	780	2492	2998	8768	7777	11628	10520	8837	8472	3452	1364	469
MEAN	25.2	83.1	96.7	283	278	375	351	285	282	111	44.0	15.6
MAX	87	201	155	1040	831	1830	732	1110	898	323	483	32
MIN	15	46	72	106	152	159	173	117	79	37	18	11
CFSM	.16	.54	.62	1.82	1.79	2.42	2.26	1.84	1.82	.72	.28	.10
IN.	.19	.60	.72	2.10	1.87	2.79	2.52	2.12	2.03	.83	.33	.11

e Estimated

STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1941 - 1998, BY WATER YEAR (WY)
MEAN	49.6	63.2	71.5	89.0	150	181	200	173	159	109	56.6	49.3
MAX	466	486	436	427	871	554	634	558	693	689	466	375
(WY)	1942	1978	1983	1974	1951	1979	1983	1973	1974	1969	1993	1989
MIN	.93	1.87	.84	.50	2.44	13.8	11.3	11.3	9.95	6.91	3.48	2.13
(WY)	1957	1977	1977	1977	1989	1956	1956	1989	1977	1977	1988	1956

SUMMARY STATISTICS	FOR 1997 CALENDAR YEAR		FOR 1998 WATER YEAR		WATER YEARS 1941 - 1998
ANNUAL TOTAL	27254.2		67557
ANNUAL MEAN	74.7		185		112
HIGHEST ANNUAL MEAN					334	1993
LOWEST ANNUAL MEAN					22.0	1977
HIGHEST DAILY MEAN	3870 A	Feb 21	1830	Mar 18	7630	Feb 19 1951
LOWEST DAILY MEAN	3.7 B	Jan 20	11	Sep 12, 13	.40	Oct 6 1956
ANNUAL SEVEN-DAY MINIMUM	4.1	Jan 14	12	Sep 7	.40	Jan 20 1977
INSTANTANEOUS PEAK FLOW			2330	Mar 18	8910 C	Feb 19 1951
INSTANTANEOUS PEAK STAGE			11.19	Mar 18	15.52	Jun 23 1974
INSTANTANEOUS LOW FLOW			11	Sep 8-13	.30	Oct 6 1956
ANNUAL RUNOFF (CFSM)	.48		1.19		.72
ANNUAL RUNOFF (INCHES)	6.54		16.21		9.84
10 PERCENT EXCEEDS	108		439		230
50 PERCENT EXCEEDS	39		129		49
90 PERCENT EXCEEDS	9.9		16		5.8

A - Estimated.
B - Estimated due to backwater from ice.
C - Gage height, 13.41 ft.