LOCATION.-- Lat 40°06'54", long 89°02'57" (NAD of 1927), in NE1/4SE1/4 sec.11, T.19 N., R.1 E., De Witt County, Hydrologic Unit 07130009, on right bank at downstream side of bridge on County Road 490 E, 0.5 mi upstream from State Highway 54, 0.8 mi upstream from a railroad bridge and Ten Mile Creek, 3.2 mi northwest of Rowell, and at mile 65.3. |
|
DRAINAGE AREA.-- 335 mi2. |
|
PERIOD OF RECORD.-- |
|
SURFACE-WATER DISCHARGE AND STAGE |
|
DISCHARGE: October 1942 to current year. |
|
STAGE: Water years 1994 to current year. |
|
SURFACE-WATER QUALITY |
|
CHEMICAL: Water years 1978-91. |
|
REVISED RECORDS.-- WDR IL-75-1: Drainage area. WDR IL-04: 2003 |
|
GAGE.-- Water-stage recorder and phone telemeter. Datum of gage is 610.00 ft above NGVD of 1929 (U.S. Army Corps of Engineers bench mark). |
|
REMARKS.-- Flow partially regulated due to storage at Clinton Reservoir, 11 mi upstream from gage since Oct. 12, 1977. |
|
EXTREMES FOR PERIOD OF RECORD.-- |
|
SURFACE-WATER DISCHARGE AND STAGE: Maximum discharge, 24,500 ft3/s, May 16, 1968, gage height, 29.21 ft; maximum discharge after Clinton Reservoir, 7,810 ft3/s, Apr. 13, 1994, gage height 24.04 ft; minimum daily discharge, 0.7 ft3/s, Oct. 4, 1954. |
|
REMARKS FOR CURRENT YEAR.-- Records fair except those for estimated daily discharges, which are poor. |
Discharge, cubic feet per second, WATER YEAR OCTOBER 2003 TO SEPTEMBER 2004 DAILY MEAN VALUES |
||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
DAY | OCT | NOV | DEC | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP |
1 | 14 | 12 | 491 | 318 | e115 | 130 | 1120 | 144 | 1190 | 187 | 59 | 241 |
2 | 14 | 12 | 432 | 298 | e112 | 113 | 1240 | 145 | 1620 | 176 | 54 | 206 |
3 | 13 | 12 | 404 | 289 | e110 | 122 | 1130 | 147 | 1520 | 174 | 47 | 177 |
4 | 13 | 13 | 364 | 374 | e108 | 142 | 948 | 128 | 1110 | 167 | 48 | 153 |
5 | 12 | 17 | 338 | 453 | e106 | 314 | 819 | 123 | 763 | 157 | 49 | 138 |
6 | 11 | 16 | 323 | 422 | e104 | 395 | 722 | 121 | 592 | 150 | 36 | 114 |
7 | 11 | 13 | 300 | 417 | e102 | 429 | 653 | 114 | 491 | 153 | 25 | 90 |
8 | 10 | 12 | 288 | 414 | e100 | 423 | 603 | 122 | 420 | 135 | 20 | 76 |
9 | 9.9 | 12 | 276 | 406 | e99 | 429 | 560 | 94 | 367 | 136 | 20 | 58 |
10 | 10 | 12 | 281 | 364 | e98 | 377 | 497 | 87 | 357 | 305 | 50 | 43 |
11 | 10 | 13 | 256 | 325 | e97 | 323 | 438 | 103 | 694 | 308 | 24 | 35 |
12 | 11 | 13 | 249 | 299 | e96 | 284 | 400 | 101 | 776 | 358 | 19 | 29 |
13 | 11 | 12 | 246 | 284 | e95 | 271 | 338 | 98 | 904 | 279 | 17 | 27 |
14 | 19 | 12 | 238 | 262 | e94 | 241 | 282 | 151 | 883 | 297 | 15 | 22 |
15 | 12 | 12 | 217 | 245 | e93 | 224 | 253 | 234 | 900 | 332 | 15 | 19 |
16 | 9.3 | 13 | 208 | 236 | e92 | 240 | 227 | 282 | 1050 | 323 | 14 | 17 |
17 | 8.8 | 13 | 184 | 228 | e91 | 214 | 215 | 294 | 824 | 300 | 13 | 17 |
18 | 8.9 | 666 | 193 | 231 | e91 | 197 | 196 | 365 | 746 | 268 | 13 | 19 |
19 | 9.1 | 886 | 183 | 222 | e115 | 181 | 157 | 730 | 648 | 237 | 12 | 14 |
20 | 9.8 | 813 | 174 | e230 | e160 | 171 | 190 | 682 | 529 | 211 | 16 | 14 |
21 | 10 | 856 | 164 | e165 | 176 | 154 | 195 | 675 | 445 | 191 | 16 | 12 |
22 | 11 | 836 | 156 | e145 | 179 | 144 | 202 | 634 | 397 | 172 | 13 | 11 |
23 | 11 | 772 | 259 | e140 | 179 | 131 | 207 | 597 | 351 | 165 | 12 | 11 |
24 | 11 | 782 | 323 | e135 | 168 | 122 | 188 | 558 | 309 | 147 | 28 | 11 |
25 | 11 | 771 | 365 | e135 | 157 | 120 | 199 | 1440 | 316 | 127 | 69 | 11 |
26 | 13 | 749 | 376 | e155 | 152 | 429 | 177 | 1370 | 288 | 100 | 278 | 11 |
27 | 12 | 703 | 374 | e140 | 144 | 716 | 167 | 1330 | 256 | 80 | 168 | 11 |
28 | 12 | 644 | 356 | e135 | 135 | 782 | 149 | 1220 | 235 | 66 | 150 | 11 |
29 | 12 | 590 | 353 | e130 | 132 | 853 | 120 | 919 | 217 | 59 | 364 | 11 |
30 | 12 | 537 | 339 | e125 | --- | 864 | 132 | 734 | 200 | 62 | 341 | 11 |
31 | 12 | --- | 322 | e120 | --- | 908 | --- | 1100 | --- | 67 | 284 | --- |
TOTAL | 353.8 | 9824 | 9032 | 7842 | 3500 | 10443 | 12724 | 14842 | 19398 | 5889 | 2289 | 1620 |
MEAN | 11.4 | 327 | 291 | 253 | 121 | 337 | 424 | 479 | 647 | 190 | 73.8 | 54.0 |
MAX | 19 | 886 | 491 | 453 | 179 | 908 | 1240 | 1440 | 1620 | 358 | 364 | 241 |
MIN | 8.8 | 12 | 156 | 120 | 91 | 113 | 120 | 87 | 200 | 59 | 12 | 11 |
e Estimated |
STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1978 - 2004, BY WATER YEAR (WY) | ||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
MEAN | 105 | 160 | 229 | 207 | 321 | 528 | 478 | 516 | 353 | 224 | 132 | 57.7 |
MAX | 1069 | 1236 | 1268 | 1316 | 975 | 2129 | 1704 | 1648 | 850 | 1370 | 1576 | 658 |
(WY) | 1994 | 1986 | 1983 | 1993 | 1982 | 1982 | 1979 | 1995 | 1999 | 1981 | 1981 | 1993 |
MIN | 8.31 | 9.77 | 12.1 | 11.0 | 14.9 | 22.3 | 54.8 | 45.2 | 13.7 | 8.51 | 6.57 | 5.46 |
(WY) | 1989 | 1989 | 1996 | 1980 | 1989 | 2000 | 2000 | 1988 | 1988 | 1988 | 1988 | 1988 |
SUMMARY STATISTICS | FOR 2003 CALENDAR YEAR | FOR 2004 WATER YEAR | WATER YEARS 1978 - 2004 | |||
---|---|---|---|---|---|---|
ANNUAL TOTAL | 54556.8 | 97756.8 | ||||
ANNUAL MEAN | 149 | 267 | 276 | |||
HIGHEST ANNUAL MEAN | 601 | 1993 | ||||
LOWEST ANNUAL MEAN | 56.3 | 2000 | ||||
HIGHEST DAILY MEAN | 886 | Nov 19 | 1620 | Jun 2 | 6960 | Apr 13 1994 |
LOWEST DAILY MEAN | 8.8 | Oct 17 | 8.8 | Oct 17 | 3.7 | Sep 8 1988 |
ANNUAL SEVEN-DAY MINIMUM | 9.6 | Oct 16 | 9.6 | Oct 16 | 4.1 | Sep 4 1988 |
MAXIMUM PEAK FLOW | 1960 | May 25 | 7810 | Apr 13 1994 | ||
MAXIMUM PEAK STAGE | 19.05 | May 25 | 24.04 | Apr 13 1994 | ||
INSTANTANEOUS LOW FLOW | 8.7 | Oct 17,18 | ||||
10 PERCENT EXCEEDS | 373 | 731 | 701 | |||
50 PERCENT EXCEEDS | 70 | 168 | 110 | |||
90 PERCENT EXCEEDS | 12 | 12 | 11 |
Table of Contents |
Introduction |
Station Descriptions |
Surface-Water Data |
Ground-Water Data |
Meteorological Data |
Biological Data |