LOCATION.-- Lat 42°11'40", long 88°59'56" (NAD of 1983), in NE1/4NE1/4 sec.21, T.43 N., R.2 E., Winnebago County, Hydrologic Unit 07090006, on left bank at upstream side of bridge on Blackhawk Road, 1.4 mi downstream from South Branch Kishwaukee River, 2 mi southwest of Perryville, 7.1 mi upstream from Killbuck Creek, and at mile 9.6. |
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DRAINAGE AREA.-- 1,099 mi2. |
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PERIOD OF RECORD.-- |
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SURFACE-WATER DISCHARGE AND STAGE |
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DISCHARGE: October 1939 to current year. |
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STAGE: Water years 1994 to current year. |
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SURFACE-WATER QUALITY |
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CHEMICAL: Water years 1978-91. |
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SEDIMENT: April 1979 to September 1981. |
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REVISED RECORDS.-- WSP 1175: 1941(P), 1942. WSP 1508: 1941, 1949. WDR IL-75-1: Drainage area. |
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GAGE.-- Water-stage recorder, phone telemeter, and U.S. Army Corps of Engineers satellite telemeter and rain gage. Datum of gage is 692.13 ft above NGVD of 1929 (levels by U.S. Army Corps of Engineers) (691.96 ft NAVD 1988). Prior to Apr. 30, 1949, nonrecording gage at same site and datum. |
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EXTREMES FOR PERIOD OF RECORD.-- |
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SURFACE-WATER DISCHARGE AND STAGE: Maximum discharge, 24,200 ft3/s, July 18, 1996, gage height 23.54 ft; minimum discharge, 46 ft3/s, Oct. 6, 7, 10, 1956. |
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SUSPENDED-SEDIMENT CONCENTRATION: Maximum daily mean, 1,860 mg/L June 7, 1980; minimum daily mean, 13 mg/L Sept. 17, 1981. |
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SUSPENDED-SEDIMENT LOADS: Maximum daily, 24,000 tons Apr. 1, 1979; minimum daily, 11 tons Sept. 17, 1981. |
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EXTREMES OUTSIDE PERIOD OF RECORD.-- |
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SURFACE-WATER DISCHARGE AND STAGE: Flood in January 1938 reached a stage of 23.85 ft, from information by the U.S. Army Corps of Engineers. |
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REMARKS FOR CURRENT YEAR.-- Records good except those for estimated daily discharges, which are poor. |
Discharge, cubic feet per second, WATER YEAR OCTOBER 2004 TO SEPTEMBER 2005 DAILY MEAN VALUES |
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DAY | OCT | NOV | DEC | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP |
1 | 162 | 292 | 484 | e360 | e430 | 914 | 640 | 380 | 336 | 156 | 87 | 79 |
2 | 168 | 373 | 442 | 387 | e420 | 838 | 632 | 374 | 327 | 151 | 84 | 71 |
3 | 168 | 443 | 416 | 413 | e400 | 746 | 650 | 370 | 316 | 145 | 84 | 68 |
4 | 170 | 385 | 398 | 410 | e400 | 716 | 632 | 358 | 320 | 143 | 78 | 66 |
5 | 166 | 341 | 385 | 374 | 579 | 715 | 600 | 349 | 345 | 150 | 78 | 63 |
6 | 160 | 325 | 415 | 301 | 1260 | 768 | 576 | 344 | 358 | 191 | 75 | 61 |
7 | 159 | 297 | 590 | 358 | 2880 | 1080 | 616 | 351 | 323 | 168 | 72 | 60 |
8 | 177 | 274 | 902 | 408 | 3300 | 1200 | 624 | 347 | 314 | 146 | 69 | 60 |
9 | 184 | 260 | 997 | 370 | 2280 | 1040 | 582 | 351 | 368 | 136 | 66 | 59 |
10 | 189 | 254 | 872 | 339 | 1670 | 899 | 544 | 356 | 374 | 128 | 64 | 56 |
11 | 181 | 247 | 733 | 337 | 1250 | 827 | 521 | 396 | 337 | 122 | 66 | 55 |
12 | 174 | 239 | 638 | 401 | 1070 | 762 | 532 | 540 | 330 | 122 | 130 | 55 |
13 | 173 | 232 | 581 | 1530 | 1320 | 680 | 573 | 537 | 325 | 121 | 112 | 51 |
14 | 174 | 228 | 460 | e1600 | 3810 | 629 | 581 | 512 | 296 | 117 | 132 | 52 |
15 | 177 | 227 | e400 | e1400 | 4460 | 594 | 536 | 473 | 272 | 111 | 114 | 48 |
16 | 177 | 231 | e350 | e1000 | 3370 | 570 | 506 | 430 | 259 | 109 | 102 | 61 |
17 | 177 | 237 | e320 | e880 | 2360 | 576 | 494 | 400 | 246 | 103 | 90 | 64 |
18 | 179 | 237 | e290 | e700 | 1730 | 578 | 483 | 380 | 232 | 98 | 218 | 67 |
19 | 178 | 269 | e280 | e620 | 1390 | 606 | 471 | 410 | 223 | 96 | 200 | 79 |
20 | 178 | 304 | e260 | e560 | 1170 | 843 | 464 | 682 | 211 | 109 | 258 | 79 |
21 | 180 | 329 | e250 | e500 | 1130 | 726 | 447 | 808 | 203 | 135 | 284 | 78 |
22 | 178 | 307 | e250 | e460 | 1110 | 660 | 457 | 679 | 192 | 144 | 211 | 71 |
23 | 229 | 288 | e250 | e440 | 988 | 637 | 482 | 578 | 183 | 141 | 159 | 67 |
24 | 301 | 273 | e240 | e420 | 900 | 620 | 474 | 519 | 174 | 125 | 135 | 69 |
25 | 282 | 270 | e240 | e400 | 850 | 615 | 449 | 473 | 169 | 117 | 122 | 87 |
26 | 246 | 268 | e240 | e380 | 817 | 648 | 444 | 434 | 166 | 109 | 113 | 124 |
27 | 225 | 310 | e240 | e380 | 771 | 673 | 435 | 414 | 167 | 109 | 110 | 121 |
28 | 210 | 442 | e240 | e380 | 828 | 685 | 420 | 400 | 162 | 110 | 102 | 119 |
29 | 217 | 597 | e240 | e440 | --- | 682 | 401 | 390 | 163 | 112 | 98 | 113 |
30 | 223 | 539 | e300 | e450 | --- | 664 | 387 | 375 | 163 | 101 | 88 | 102 |
31 | 234 | --- | e360 | e450 | --- | 658 | --- | 355 | --- | 95 | 82 | --- |
TOTAL | 5996 | 9318 | 13063 | 17448 | 42943 | 22849 | 15653 | 13765 | 7854 | 3920 | 3683 | 2205 |
MEAN | 193 | 311 | 421 | 563 | 1534 | 737 | 522 | 444 | 262 | 126 | 119 | 73.5 |
MAX | 301 | 597 | 997 | 1600 | 4460 | 1200 | 650 | 808 | 374 | 191 | 284 | 124 |
MIN | 159 | 227 | 240 | 301 | 400 | 570 | 387 | 344 | 162 | 95 | 64 | 48 |
CFSM | 0.18 | 0.28 | 0.38 | 0.51 | 1.40 | 0.67 | 0.47 | 0.40 | 0.24 | 0.12 | 0.11 | 0.07 |
IN. | 0.20 | 0.32 | 0.44 | 0.59 | 1.45 | 0.77 | 0.53 | 0.47 | 0.27 | 0.13 | 0.12 | 0.07 |
e Estimated |
STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1940 - 2005, BY WATER YEAR (WY) | ||||||||||||
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MEAN | 464 | 564 | 593 | 619 | 891 | 1382 | 1260 | 1057 | 992 | 596 | 446 | 440 |
MAX | 2309 | 2881 | 3230 | 2265 | 2963 | 5395 | 4267 | 3355 | 3827 | 3263 | 2853 | 3577 |
(WY) | 1973 | 1986 | 1983 | 1969 | 1997 | 1979 | 1993 | 1996 | 1993 | 1993 | 1987 | 1972 |
MIN | 75.5 | 95.8 | 83.5 | 68.8 | 98.8 | 230 | 280 | 212 | 214 | 126 | 97.4 | 73.5 |
(WY) | 1957 | 1957 | 1964 | 1959 | 1940 | 1956 | 1963 | 1949 | 1959 | 2005 | 1964 | 2005 |
SUMMARY STATISTICS | FOR 2004 CALENDAR YEAR | FOR 2005 WATER YEAR | WATER YEARS 1940 - 2005 | |||
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ANNUAL TOTAL | 301792 | 158697 | ||||
ANNUAL MEAN | 825 | 435 | 774 | |||
HIGHEST ANNUAL MEAN | 1955 | 1993 | ||||
LOWEST ANNUAL MEAN | 227 | 1977 | ||||
HIGHEST DAILY MEAN | 8250 | May 24 | 4460 | Feb 15 | 16700 | Jul 19 1996 |
LOWEST DAILY MEAN | 159 | A | 48 | Sep 15 | 48 | Sep 15 2005 |
ANNUAL SEVEN-DAY MINIMUM | 160 | Sep 25 | 54 | Sep 9 | 52 | Sep 11 1964 |
MAXIMUM PEAK FLOW | 4630 B | Feb 15 | 24200 | Jul 18 1996 | ||
MAXIMUM PEAK STAGE | 12.27 C | Jan 17 | 23.54 | Jul 18 1996 | ||
INSTANTANEOUS LOW FLOW | 47 | Sep 13-15 | 46 | D | ||
ANNUAL RUNOFF (CFSM) | 0.750 | 0.396 | 0.704 | |||
ANNUAL RUNOFF (INCHES) | 10.22 | 5.37 | 9.57 | |||
10 PERCENT EXCEEDS | 2150 | 827 | 1680 | |||
50 PERCENT EXCEEDS | 379 | 327 | 428 | |||
90 PERCENT EXCEEDS | 184 | 87 | 129 |
Table of Contents |
Introduction |
Station Descriptions |
Surface-Water Data |
Ground-Water Data |
Meteorological Data |
Biological Data |