USGS CD-ROM: Current Year Discharge

05419000 APPLE RIVER NEAR HANOVER, IL

LOCATION.--Lat 42°15'05", long 90°17'10", in NE¼NW¼ sec.16, T.26 N., R.2 E., Jo Daviess County, Hydrologic Unit 07060005, on right bank, 0.3 mi southwest of Hanover, and at mile 13.9.

DRAINAGE AREA.--247 mi².

PERIOD OF RECORD.--October 1934 to current year. Monthly discharge only for some periods, published in WSP 1308.

REVISED RECORDS.--WSP 1005: 1939, 1941(M). WSP 1308: 1935-38(M), 1943-45(M). WDR IL-75-1: Drainage area.

GAGE.--Water-stage recorder. Datum of gage is 591.00 ft above sea level. Prior to Oct. 1, 1945, nonrecording gage at site 3.5 mi downstream at datum 9.48 ft lower.

REMARKS.--Records good except those for estimated daily discharge, which are poor. Occasional regulation during low flow by dam at Hanover. 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	66	69	58	e53	89	472	2470	284	172	288	86	122
2	65	70	56	58	124	367	1180	269	164	248	84	116
3	64	68	62	79	120	320	819	263	154	228	84	116
4	64	65	65	128	111	294	633	249	147	226	93	106
5	59	64	61	155	105	269	516	235	148	209	125	99

6	57	69	58	199	101	255	457	228	143	214	353	94
7	56	75	57	204	102	242	433	253	136	444	350	92
8	55	74	57	192	98	334	711	300	134	392	160	88
9	57	72	57	175	95	356	1060	255	188	250	131	83
10	53	71	61	111	92	277	820	230	165	213	122	82

11	57	67	60	116	114	258	661	220	306	191	115	81
12	61	65	57	e110	198	233	579	225	479	178	104	79
13	78	64	56	e94	171	246	531	234	290	166	99	76
14	73	65	51	e84	156	234	544	207	247	156	97	245
15	64	67	55	e95	151	217	463	199	233	149	131	627

16	58	64	58	e102	154	210	857	204	209	143	115	253
17	56	58	54	e100	177	224	791	182	192	136	107	192
18	56	61	57	e98	189	444	546	173	362	130	112	161
19	56	60	57	e96	175	573	455	170	1280	150	99	146
20	55	60	57	94	164	429	412	171	484	140	199	134

21	54	60	54	93	156	363	533	162	383	126	490	124
22	53	59	58	92	149	333	480	153	304	122	148	118
23	53	57	58	92	145	309	406	153	264	119	125	111
24	55	52	58	91	153	283	365	227	251	112	162	114
25	55	58	61	88	150	272	338	217	232	107	194	111

26	64	59	61	86	164	269	354	182	225	103	145	107
27	70	59	53	85	1050	253	342	164	215	100	123	102
28	65	59	56	87	820	242	299	168	1220	99	263	98
29	64	59	59	88	---	227	287	245	534	96	208	93
30	64	62	49	88	---	244	287	218	364	92	165	95

31	65	---	e51	82	---	3560	---	199	---	90	138	---

TOTAL	1872	1912	1772	3315	5473	12609	18629	6639	9625	5417	4927	4065
MEAN	60.4	63.7	57.2	107	195	407	621	214	321	175	159	136
MAX	78	75	65	204	1050	3560	2470	300	1280	444	490	627
MIN	53	52	49	53	89	210	287	153	134	90	84	76
CFSM	.24	.26	.23	.43	.79	1.65	2.51	.87	1.30	.71	.64	.55
IN.	.28	.29	.27	.50	.82	1.90	2.81	1.00	1.45	.82	.74	.61

e Estimated

STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1935 - 1998, BY WATER YEAR (WY)
MEAN	111	128	113	148	246	343	255	232	221	140	99.6	125
MAX	807	672	565	779	837	945	1104	1172	1077	974	459	968
(WY)	1987	1962	1983	1960	1971	1959	1973	1973	1993	1993	1981	1965
MIN	19.7	24.4	21.4	15.2	19.4	34.2	40.2	30.9	29.9	23.1	18.6	21.0
(WY)	1941	1941	1990	1940	1940	1954	1940	1940	1989	1989	1941	1940

SUMMARY STATISTICS	FOR 1997 CALENDAR YEAR		FOR 1998 WATER YEAR		WATER YEARS 1935 - 1998
ANNUAL TOTAL	52753		76255
ANNUAL MEAN	145		209		180
HIGHEST ANNUAL MEAN					480	1993
LOWEST ANNUAL MEAN					39.3	1940
HIGHEST DAILY MEAN	3450 A	Feb 21	3560	Mar 31	9010	Feb 21 1937
LOWEST DAILY MEAN	45 A	Jan 1	49 B	Dec 30	3.5	May 24 1967
ANNUAL SEVEN-DAY MINIMUM	49	Sep 1	54	Dec 27	10	Dec 28 1939
INSTANTANEOUS PEAK FLOW			5000	Mar 31	12000	Jan 5 1946
INSTANTANEOUS PEAK STAGE			16.64	Mar 31	26.12 C	Jan 5 1946
INSTANTANEOUS LOW FLOW			35 B	Dec 30	.00	D
ANNUAL RUNOFF (CFSM)	.59		.85		.73
ANNUAL RUNOFF (INCHES)	7.94		11.48		9.88
10 PERCENT EXCEEDS	229		419		330
50 PERCENT EXCEEDS	84		134		86
90 PERCENT EXCEEDS	55		58		31

A - Estimated due to backwater from ice.
B - Result of freezeup.
C - Ice jam.
D - May 23, 24, 1967, result of temporary closure of gate at dam at Hanover.