05439000 DATA: Discharge Tables, 2000

Station list Available data
ROCK RIVER BASIN

05439000 SOUTH BRANCH KISHWAUKEE RIVER AT DE KALB, IL

LOCATION.-- Lat 41°55'53", long 88°45'35", 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 1995-2000.

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.--
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 1999 TO SEPTEMBER 2000 DAILY MEAN VALUES
DAY	OCT	NOV	DEC	JAN	FEB	MAR	APR	MAY	JUN	JUL	AUG	SEP

1	25	4.2	2.4	e3.2	e4.0	86	17	52	307	78	51	2.0
2	17	4.6	2.6	e3.2	e3.8	68	17	45	259	84	31	1.8
3	19	4.7	3.9	e3.5	e3.6	63	17	40	151	269	18	2.3
4	24	4.5	5.5	e4.8	e3.5	59	16	38	112	176	12	2.3
5	19	4.1	30	e4.2	e3.5	52	15	35	113	127	30	2.3

6	16	4.1	15	e3.7	e3.4	46	16	34	93	98	43	1.8
7	12	3.5	10	e3.4	e3.4	43	17	34	78	79	81	1.2
8	11	3.8	8.5	e3.7	e3.3	42	19	36	68	68	54	1.7
9	8.6	3.9	7.7	e4.3	e3.5	42	21	56	59	62	32	1.9
10	7.7	3.6	7.4	e6.0	e3.7	34	22	142	53	249	21	1.9

11	7.4	8.0	6.5	e5.4	e3.7	33	19	162	87	256	15	18
12	6.7	4.7	6.6	e4.8	e3.5	32	16	177	669	144	11	27
13	6.3	3.8	6.0	e4.4	e3.7	31	15	110	736	104	10	7.5
14	8.9	3.2	6.3	e4.3	e3.6	30	15	82	700	83	9.1	12
15	8.3	3.3	7.7	e4.3	e3.5	30	16	68	567	66	7.3	5.6

16	7.4	3.6	6.9	e4.3	e3.6	27	19	63	345	55	5.8	6.3
17	5.8	3.3	5.6	e4.3	e3.5	23	25	55	238	48	17	2.2
18	5.5	3.4	5.1	e4.2	e3.5	23	20	53	185	39	10	1.9
19	6.0	4.0	5.1	e4.1	e3.5	28	105	51	151	35	7.5	2.0
20	4.8	3.5	5.6	e3.8	e4.0	33	371	43	142	31	5.6	5.8

21	4.9	2.9	5.5	e4.0	e6.0	24	400	39	121	27	4.8	3.8
22	5.6	3.0	4.0	e4.2	21	22	243	43	102	23	4.2	30
23	6.1	4.1	e3.6	e4.3	156	21	169	37	100	19	3.9	22
24	4.7	4.2	e3.3	e4.2	400	25	129	33	178	17	3.8	20
25	4.3	3.2	e3.2	e4.0	345	24	103	28	308	15	4.5	16

26	4.0	3.5	e3.4	e3.9	224	21	88	26	205	13	4.2	12
27	3.7	3.7	e3.3	e3.7	158	24	78	29	148	12	2.8	10
28	3.8	3.1	e3.2	e3.6	118	22	67	29	120	10	3.0	8.4
29	4.7	2.8	e3.1	e3.7	101	18	59	24	105	9.8	3.9	6.7
30	4.9	2.4	e3.1	e3.8	---	16	51	25	90	9.8	3.6	6.0

31	4.8	---	e3.2	e3.9	---	15	---	83	---	31	2.2	---

TOTAL	277.9	114.7	193.3	127.2	1600.8	1057	2185	1772	6590	2337.6	512.2	242.4
MEAN	8.96	3.82	6.24	4.10	55.2	34.1	72.8	57.2	220	75.4	16.5	8.08
MAX	25	8.0	30	6.0	400	86	400	177	736	269	81	30
MIN	3.7	2.4	2.4	3.2	3.3	15	15	24	53	9.8	2.2	1.2
CFSM	.12	.05	.08	.05	.71	.44	.94	.74	2.83	.97	.21	.10
IN.	.13	.05	.09	.06	.77	.51	1.05	.85	3.16	1.12	.25	.12

e Estimated

STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1926 - 2000, BY WATER YEAR (WY)
MEAN	24.4	59.6	59.6	44.7	75.8	101	110	94.4	91.5	60.8	37.5	30.5
MAX	119	246	261	154	231	292	309	221	257	322	383	337
(WY)	1927	1986	1983	1993	1997	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 1999 CALENDAR YEAR		FOR 2000 WATER YEAR		WATER YEARS 1926 - 2000
ANNUAL TOTAL	26250.68		17010.1
ANNUAL MEAN	71.9		46.5		65.7
HIGHEST ANNUAL MEAN					151	1993
LOWEST ANNUAL MEAN					13.4	1931
HIGHEST DAILY MEAN	849	Jun 14	736	Jun 13	2520	Jul 3 1983
LOWEST DAILY MEAN	.00	Sep 11,24	1.2	Sep 7	.00	A
ANNUAL SEVEN-DAY MINIMUM	.17	Sep 20	1.9	Sep 4	.03	Sep 30 1931
INSTANTANEOUS PEAK FLOW			818	Jun 12	3500	Jul 2 1983
INSTANTANEOUS PEAK STAGE			7.51	Jun 12	15.80 B	Jul 2 1983
INSTANTANEOUS LOW FLOW			1.1	Sep 7
ANNUAL RUNOFF (CFSM)	.93		.60		.85
ANNUAL RUNOFF (INCHES)	12.57		8.14		11.49
10 PERCENT EXCEEDS	195		120		161
50 PERCENT EXCEEDS	19		12		28
90 PERCENT EXCEEDS	1.2		3.3		1.9

A - Aug. 7, Sept. 20, 21, 1988, Aug. 24, 1991, and Sept. 11, 24, 1999.
B - Present datum.