05439000 DATA: Discharge Tables, 2001

Station list Available data
ROCK RIVER BASIN

05439000 SOUTH BRANCH KISHWAUKEE RIVER AT DE KALB, IL

LOCATION.-- Lat 41°55'52", long 88°45'34", in SW1/4NE1/4 sec.22, T.40 N., R.4 E., De Kalb County, Hydrologic Unit 07090006, on left bank 100 ft downstream from bridge on State Highway 38 in De Kalb, and at mile 48.5.

DRAINAGE AREA.-- 77.7 mi².

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

DISCHARGE: July 1925 to October 1933, October 1979 to current year.

STAGE: Water years 1995-2001.

SURFACE-WATER QUALITY

SEDIMENT: October 1979 to September 1981.

REVISED RECORDS.-- WDR IL-80-1: Drainage area.

GAGE.-- Water-stage recorder, phone telemeter, and crest stage gage. Datum of gage is 831.88 ft above sea level. Mar. 23, 1980, to Sept. 30, 1983, at datum 3.0 ft higher. Oct. 1, 1979, to Mar. 22, 1980, nonrecording gage at same site at datum 3.0 ft higher. Prior to Sept. 30, 1933, nonrecording gage at same site at datum 3.40 ft higher.

EXTREMES FOR PERIOD OF RECORD.--
SURFACE-WATER DISCHARGE AND STAGE: Maximum discharge, 3,500 ft³/s, July 2, 1983, gage height, 15.80 ft; present datum; no flow, several days.
SUSPENDED-SEDIMENT CONCENTRATIONS: Maximum daily mean, 1,650 mg/L June 13, 1981; minimum daily mean, 10 mg/L Mar. 9, 1980.
SUSPENDED-SEDIMENT LOADS: Maximum daily, 3,070 tons June 13, 1981; minimum daily, 0.04 ton Oct. 15, 1979.

REMARKS FOR CURRENT YEAR.-- Records good 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	7.1	9.4	18	e8.6	138	176	63	44	96	19	1.3	.28
2	5.4	10	18	e8.6	175	144	59	41	154	17	6.6	.27
3	7.2	12	17	e8.7	80	141	57	38	120	21	1.5	.84
4	44	12	19	e9.0	56	140	60	41	94	17	.86	2.2
5	46	4.7	18	e9.0	45	101	66	36	178	14	.80	.72

6	33	13	18	e9.0	39	82	84	36	264	12	2.3	1.4
7	24	24	19	e9.4	34	75	82	45	173	12	.59	13
8	21	18	19	e9.5	51	73	72	37	133	11	.41	1.6
9	18	68	15	e9.3	636	59	76	33	110	10	.42	8.9
10	17	131	17	e9.1	766	58	69	36	95	8.9	.45	4.0

11	15	75	12	10	500	70	85	46	84	7.4	.37	1.4
12	14	56	10	10	311	78	149	34	77	6.3	.35	.86
13	13	48	e9.5	10	227	100	110	31	68	6.0	.29	.61
14	14	39	e9.6	12	225	83	96	32	62	5.5	.28	.52
15	13	34	e9.8	16	222	192	102	33	63	4.9	.31	.50

16	13	33	e10	15	171	302	101	31	53	3.4	4.7	.52
17	12	28	e11	13	139	201	89	28	49	2.6	1.1	1.2
18	12	24	e9.6	13	135	187	79	28	49	3.6	3.0	5.6
19	12	24	e9.0	13	106	218	76	24	42	3.6	2.1	110
20	12	23	e9.0	12	129	216	73	24	38	2.9	.84	20

21	11	21	e8.9	11	106	200	78	36	52	2.3	.65	30
22	11	21	e8.8	9.9	88	174	67	28	54	2.4	.85	8.1
23	10	18	e8.8	9.6	71	156	66	25	39	2.0	.61	35
24	11	17	e8.7	9.6	218	135	57	27	34	4.7	.56	18
25	11	18	e8.3	9.1	992	114	54	24	30	1.7	.92	9.9

26	12	22	e8.1	8.5	593	98	53	33	27	.93	.84	6.1
27	12	19	e8.3	9.0	372	87	50	46	25	.86	.53	4.6
28	11	17	e8.6	8.7	238	78	47	40	24	.68	.40	3.8
29	9.9	18	e8.6	28	---	72	45	35	22	.49	.30	3.3
30	9.5	17	e8.6	113	---	66	43	32	20	2.2	.29	3.3

31	9.6	---	e8.6	142	---	66	---	39	---	.80	.37	---

TOTAL	470.7	874.1	371.8	572.6	6863	3942	2208	1063	2329	207.16	34.89	296.52
MEAN	15.2	29.1	12.0	18.5	245	127	73.6	34.3	77.6	6.68	1.13	9.88
MAX	46	131	19	142	992	302	149	46	264	21	6.6	110
MIN	5.4	4.7	8.1	8.5	34	58	43	24	20	.49	.28	.27
CFSM	.20	.37	.15	.24	3.15	1.64	.95	.44	1.00	.09	.01	.13
IN.	.23	.42	.18	.27	3.29	1.89	1.06	.51	1.12	.10	.02	.14

e Estimated

STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1926 - 2001, BY WATER YEAR (WY)
MEAN	24.1	58.6	58.0	43.8	81.4	102	108	92.4	91.0	59.0	36.3	29.8
MAX	119	246	261	154	245	292	309	221	257	322	383	337
(WY)	1927	1986	1983	1993	2001	1993	1993	1995	1993	1983	1987	1980
MIN	.22	1.43	.93	4.10	6.14	12.3	18.6	11.4	9.97	1.52	.51	.33
(WY)	1934	1998	1998	2000	1931	1996	1996	1931	1930	1988	1931	1988

SUMMARY STATISTICS	FOR 2000 CALENDAR YEAR		FOR 2001 WATER YEAR		WATER YEARS 1926 - 2001
ANNUAL TOTAL	18140.8		19232.77
ANNUAL MEAN	49.6		52.7		65.2
HIGHEST ANNUAL MEAN					151	1993
LOWEST ANNUAL MEAN					13.4	1931
HIGHEST DAILY MEAN	736	Jun 13	992	Feb 25	2520	Jul 3 1983
LOWEST DAILY MEAN	1.2	Sep 7	.27	Sep 2	.00	A
ANNUAL SEVEN-DAY MINIMUM	1.9	Sep 4	.35	Aug 27	.03	Sep 30 1931
MAXIMUM PEAK FLOW			1080	Feb 25	3500	Jul 2 1983
MAXIMUM PEAK STAGE			8.33	Feb 25	15.80 B	Jul 2 1983
INSTANTANEOUS LOW FLOW			.25	A
ANNUAL RUNOFF (CFSM)	.64		.68		.84
ANNUAL RUNOFF (INCHES)	8.69		9.21		11.41
10 PERCENT EXCEEDS	123		135		160
50 PERCENT EXCEEDS	18		19		28
90 PERCENT EXCEEDS	3.7		.93		1.9

	A - Several days.
	B - Present datum.