05436500 DATA: Discharge Tables, 2003

Station list Available data
ROCK RIVER BASIN


LOCATION.-- Lat 42°36'42", long 89°23'53" (NAD of 1927), in SW 1/4 sec.26, T.2 N., R.9 E., Green County, Hydrologic Unit 07090004, on left bank at downstream side of highway bridge, 1.2 mi southwest of Brodhead, and 1.9 mi upstream from Sylvester Creek.

DRAINAGE AREA.-- 523 mi².

PERIOD OF RECORD.--
SURFACE-WATER DISCHARGE AND STAGE
	DISCHARGE: January 1914 to current year. Monthly discharge for January and February 1914 published in WSP 1308.

REVISED RECORDS.-- WSP 1238: 1914-16, 1918, 1922, 1927, 1933. WSP 1508: 1916-17(M), 1919(M), 1920, 1921(M), 1927-28(M), 1930(M), 1931, 1936(M), 1943(M). WDR WI-73-1: Drainage area.

GAGE.-- Water-stage recorder and phone telemeter. Datum of gage is 768.14 ft above NGVD of 1929. Prior to Oct. 17, 1938, nonrecording gage 20 ft upstream at same datum.

REMARKS.-- Some regulation from dam and non-operational powerplant upstream.

EXTREMES FOR PERIOD OF RECORD.--
SURFACE-WATER DISCHARGE AND STAGE: Maximum discharge, 14,800 ft³/s. September 13, 1915, from rating curve extended above 7,500 ft³/s, gage height, 11.40 feet, from floodmarks; minimum discharge, 35 ft³/s, September 19, 1959.

REMARKS FOR CURRENT YEAR.-- Records good except those for estimated daily discharges, which are poor.

Discharge, cubic feet per second, WATER YEAR OCTOBER 2002 TO SEPTEMBER 2003 DAILY MEAN VALUES
DAY	OCT	NOV	DEC	JAN	FEB	MAR	APR	MAY	JUN	JUL	AUG	SEP

1	414	276	e220	243	e180	e200	312	395	279	218	190	135
2	378	261	e220	e230	e180	e200	300	578	273	201	181	135
3	379	262	e220	e230	e180	e190	294	644	268	199	176	137
4	471	279	e220	232	e180	e190	298	526	264	200	180	139
5	557	264	e220	258	e180	e190	317	468	256	225	184	126

6	585	262	e220	246	e180	e190	320	486	253	232	177	126
7	536	267	e220	237	e180	e190	311	477	255	233	181	126
8	424	264	e220	237	e180	e190	301	481	265	243	169	112
9	362	262	e220	243	e180	e190	290	667	262	302	164	117
10	329	261	e220	e230	e180	e190	293	693	256	326	163	120

11	323	259	e230	e180	e180	e190	309	677	250	283	161	119
12	315	255	236	e220	e180	e200	305	567	247	263	160	124
13	307	254	238	e210	e180	e220	292	482	244	241	159	154
14	297	254	244	e200	e180	e300	280	447	236	225	157	238
15	293	252	246	e190	e180	e360	262	442	229	242	154	300

16	302	251	e240	e190	e180	418	249	439	220	269	151	297
17	288	247	243	e180	e180	364	267	405	215	250	145	236
18	288	247	265	e180	e200	323	263	370	230	231	144	194
19	292	252	329	e180	e240	308	275	346	234	215	141	178
20	291	256	372	e180	e300	302	304	411	223	206	140	169

21	281	246	329	e180	e270	316	326	456	210	200	142	167
22	288	239	292	e180	e250	311	314	444	205	198	133	169
23	300	249	241	e180	e250	296	291	373	201	204	133	169
24	274	247	237	e180	e240	289	272	339	195	201	131	168
25	286	245	e240	e170	e230	285	260	321	205	187	131	163

26	302	232	e240	e170	e210	281	252	304	267	181	131	162
27	312	217	e240	e170	e200	277	244	291	259	178	127	167
28	305	235	264	e170	e200	303	244	285	232	176	124	169
29	292	265	252	e170	---	378	219	285	232	174	128	166
30	288	e230	254	e170	---	400	244	287	232	171	135	165

31	281	---	252	e180	---	341	---	294	---	177	134	---

e Estimated

STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1914 - 2003, BY WATER YEAR (WY)
MEAN	287	308	272	293	430	653	463	375	375	303	260	297
MAX	788	836	597	1168	1690	1698	1159	1368	1320	1248	694	1579
(WY)	1928	1962	1929	1916	1938	1929	1993	1973	2000	1993	1924	1938
MIN	126	127	120	89.4	127	181	198	140	113	117	105	106
(WY)	1965	1965	1956	1956	1959	1934	1938	1934	1934	1958	1934	1958

SUMMARY STATISTICS	FOR 2002 CALENDAR YEAR		FOR 2003 WATER YEAR		WATER YEARS 1914 - 2003
ANNUAL TOTAL	130676		92071
ANNUAL MEAN	358		252		359
HIGHEST ANNUAL MEAN					694	1993
LOWEST ANNUAL MEAN					172	1934
HIGHEST DAILY MEAN	1290	Jun 5	693	May 10	10800	Mar 14 1929
LOWEST DAILY MEAN	217	Nov 27	112	Sep 8	51	Jun 13 1934
ANNUAL SEVEN-DAY MINIMUM	220	Dec 1	121	Sep 6	71	Jun 28 1934
MAXIMUM PEAK FLOW			742	May 9	14800	Sep 13 1915
MAXIMUM PEAK STAGE			2.72	May 9	11.40	Sep 13 1915
INSTANTANEOUS LOW FLOW					35	Sep 19 1959
ANNUAL RUNOFF (CFSM)	0.68		0.48		0.69
ANNUAL RUNOFF (INCHES)	9.29		6.55		9.34
10 PERCENT EXCEEDS	494		361		584
50 PERCENT EXCEEDS	315		240		263
90 PERCENT EXCEEDS	236		163		150