LOCATION.-- Lat 41°00'05", long 90°51'15" (NAD of 1927), in NE1/4SW1/4 sec.28, T.12 N., R.4 W., Henderson County, Hydrologic Unit 07080104, on left bank at downstream side of bridge on State Highway 94, 1 mi south of Bald Bluff, 6.5 mi northeast of Oquawka, and at mile 20.8. |
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DRAINAGE AREA.-- 432 mi2. |
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PERIOD OF RECORD.-- |
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SURFACE-WATER DISCHARGE AND STAGE |
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DISCHARGE: October 1934 to September 1996. October 1997 to current year. Prior to October 1938, published as Henderson River. Monthly discharge only for some periods, published in WSP 1308. |
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STAGE: Water years 1994-1996;1998-2002. |
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SURFACE-WATER QUALITY |
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CHEMICAL: Water years 1978 to 1991. Additional chemical data for water years 1972-77 are published in Water-Resources Investigations 78-23 and 79-24 as site LD 02. |
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SEDIMENT: April 1978 to September 1981. |
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REVISED RECORDS.-- WSP 1208: 1939, 1942-43, 1948. WSP 1308: 1935-38(M), 1941(M). WDR IL-75-1: Drainage area. |
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GAGE.-- Water-stage recorder, U.S. Army Corps of Engineers satellite telemeter and rain gage, and crest-stage gage. Datum of gage is 541.21 ft above NGVD of 1929 (levels by U.S. Army Corps of Engineers). Prior to Mar. 4, 1941, 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, 34,600 ft3/s, July 8, 1982, gage height, 31.05 ft; maximum gage height, 32.65 ft, July 25, 1993, discharge 30,800 ft3/s; minimum daily observed, 1.7 ft3/s, Sept. 22, 23, 1940. |
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SUSPENDED-SEDIMENT CONCENTRATIONS: Maximum daily mean, 7,070 mg/L May 27, 1981; minimum daily mean, 6 mg/L Feb. 10, 11, 1981. |
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SUSPENDED-SEDIMENT LOADS: Maximum daily, 33,900 tons Apr. 14, 1981; minimum daily, 0.87 tons Feb. 2-4, 1980. |
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REMARKS FOR CURRENT YEAR.-- Records good except those for estimated daily discharges, which are poor. |
DISCHARGE, in CFS, WATER YEAR OCTOBER 2001 TO SEPTEMBER 2002 DAILY MEAN VALUES |
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DAY | OCT | NOV | DEC | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP |
1 | 36 | 76 | 67 | e52 | 156 | e212 | 209 | 663 | 640 | 335 | 106 | 73 |
2 | 34 | 73 | 64 | e51 | 97 | e200 | 220 | 624 | 594 | 312 | 93 | 65 |
3 | 32 | 70 | 60 | e51 | 98 | e170 | 218 | 549 | 572 | 296 | 83 | 58 |
4 | 35 | 64 | 58 | e52 | 72 | e240 | 190 | 489 | 1270 | 280 | 77 | 55 |
5 | 77 | 60 | 57 | e53 | 89 | e270 | 183 | 456 | 3570 | 263 | 80 | 49 |
6 | 96 | 59 | 59 | e54 | 77 | e235 | 181 | 447 | 1840 | 288 | 94 | 44 |
7 | 56 | 60 | 63 | e56 | 77 | e220 | 214 | 432 | 999 | 328 | 76 | 44 |
8 | 40 | 61 | 60 | e58 | 75 | 498 | 617 | 397 | 817 | 269 | 64 | 43 |
9 | 34 | 57 | 57 | e60 | 73 | 851 | 1760 | 474 | 718 | 239 | 59 | 39 |
10 | 35 | 58 | 56 | e63 | 104 | 722 | 1220 | 464 | 662 | 222 | 55 | 36 |
11 | 41 | 56 | 56 | e62 | 177 | 591 | 916 | 1090 | 855 | 251 | 51 | 34 |
12 | 53 | 54 | 56 | e60 | 191 | 520 | 772 | 4250 | 1060 | 320 | 48 | 32 |
13 | 53 | 54 | 72 | e57 | 169 | 461 | 669 | 4850 | 3350 | 240 | 49 | 31 |
14 | 65 | 42 | 116 | e55 | 185 | 421 | 605 | 2380 | 5920 | 203 | 50 | 31 |
15 | 81 | 49 | 91 | e53 | 204 | 386 | 556 | 1360 | 2920 | 182 | 47 | 39 |
16 | 64 | 48 | 78 | e51 | 196 | 336 | 497 | 1130 | 1360 | 167 | 49 | 43 |
17 | 59 | 47 | 75 | e50 | 187 | 313 | 450 | 1020 | 1060 | 157 | 46 | 42 |
18 | 50 | 48 | 74 | e49 | 168 | 308 | 418 | 893 | 910 | 149 | 42 | 43 |
19 | 43 | 58 | 71 | e52 | 179 | 290 | 396 | 799 | 797 | 276 | 118 | 41 |
20 | 40 | 47 | 66 | e54 | 361 | 287 | 363 | 724 | 722 | 212 | 179 | 44 |
21 | 39 | 54 | 64 | e56 | 581 | 268 | 435 | 669 | 656 | 157 | 80 | 45 |
22 | 43 | 50 | 73 | e58 | 453 | 233 | 512 | 631 | 608 | 133 | 60 | 44 |
23 | 278 | 48 | e85 | e58 | 380 | 254 | 430 | 679 | 561 | 119 | 1000 | 42 |
24 | 252 | 68 | e100 | e56 | 339 | 252 | 428 | 1180 | 519 | 109 | 868 | 44 |
25 | 196 | 126 | e110 | 53 | 302 | 239 | 498 | 2260 | 485 | 102 | 290 | 38 |
26 | 153 | 111 | e90 | 59 | 265 | 228 | 446 | 3120 | 476 | 99 | 177 | 38 |
27 | 118 | 82 | e82 | 55 | 221 | 227 | 507 | 1320 | 472 | 327 | 147 | 37 |
28 | 108 | 85 | e76 | 56 | e218 | 228 | 1120 | 1030 | 425 | 432 | 114 | 36 |
29 | 92 | 71 | e72 | 55 | --- | 232 | 896 | 876 | 384 | 206 | 93 | 36 |
30 | 84 | 70 | e65 | 56 | --- | 235 | 737 | 768 | 360 | 160 | 85 | 34 |
31 | 82 | --- | e57 | 96 | --- | 218 | --- | 691 | --- | 128 | 79 | --- |
TOTAL | 2469 | 1906 | 2230 | 1751 | 5694 | 10145 | 16663 | 36715 | 35582 | 6961 | 4459 | 1280 |
MEAN | 79.65 | 63.53 | 71.94 | 56.48 | 203.4 | 327.3 | 555.4 | 1184 | 1186 | 224.5 | 143.8 | 42.67 |
MAX | 278 | 126 | 116 | 96 | 581 | 851 | 1760 | 4850 | 5920 | 432 | 1000 | 73 |
MIN | 32 | 42 | 56 | 49 | 72 | 170 | 181 | 397 | 360 | 99 | 42 | 31 |
CFSM | 0.18 | 0.15 | 0.17 | 0.13 | 0.47 | 0.76 | 1.29 | 2.74 | 2.75 | 0.52 | 0.33 | 0.10 |
IN. | 0.21 | 0.16 | 0.19 | 0.15 | 0.49 | 0.87 | 1.43 | 3.16 | 3.06 | 0.60 | 0.38 | 0.11 |
e Estimated |
STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1935 - 2002, BY WATER YEAR (WY) | ||||||||||||
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MEAN | 151.3 | 177.4 | 179.8 | 245.2 | 376.1 | 458.6 | 502.0 | 485.0 | 470.5 | 313.4 | 144.8 | 132.1 |
MAX | 1560 | 1189 | 1176 | 1265 | 1473 | 1752 | 1742 | 1829 | 1960 | 2967 | 1675 | 1222 |
(WY) | 1942 | 1978 | 1983 | 1969 | 2001 | 1979 | 1973 | 1996 | 1974 | 1982 | 1993 | 1970 |
MIN | 7.10 | 9.89 | 8.38 | 4.45 | 13.5 | 47.4 | 33.4 | 26.9 | 31.3 | 6.58 | 9.61 | 5.65 |
(WY) | 1938 | 1938 | 1964 | 1940 | 1989 | 1956 | 1956 | 1989 | 1940 | 1936 | 1936 | 1940 |
SUMMARY STATISTICS | FOR 2001 CALENDAR YEAR | FOR 2002 WATER YEAR | WATER YEARS 1935 - 2002 | |||
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ANNUAL TOTAL | 159348 | 125855 | ||||
ANNUAL MEAN | 436.6 | 344.8 | 302.6 | |||
HIGHEST ANNUAL MEAN | 1002 | 1993 | ||||
LOWEST ANNUAL MEAN | 50.9 | 1989 | ||||
HIGHEST DAILY MEAN | 5880 A | Feb 25 | 5920 | Jun 14 | 25800 | Jul 25 1993 |
LOWEST DAILY MEAN | 17 | Sep 5 | 31 | Sep 13,14 | 1.7 B | C |
ANNUAL SEVEN-DAY MINIMUM | 22 | Aug 30 | 35 | Sep 9 | 2.1 | Sep 17 1940 |
MAXIMUM PEAK FLOW | 6530 | Jun 14 | 34600 D | Jul 8 1982 | ||
MAXIMUM PEAK STAGE | 25.56 | Jun 14 | 32.65 E | Jul 25 1993 | ||
INSTANTANEOUS LOW FLOW | 4.1 F | Nov 14 | ||||
ANNUAL RUNOFF (CFSM) | 1.01 | 0.80 | 0.70 | |||
ANNUAL RUNOFF (INCHES) | 13.72 | 10.84 | 9.52 | |||
10 PERCENT EXCEEDS | 1100 | 798 | 678 | |||
50 PERCENT EXCEEDS | 118 | 116 | 128 | |||
90 PERCENT EXCEEDS | 40 | 44 | 19 |
Table of Contents |
Introduction |
Station Descriptions |
Surface-Water Data |
Ground-Water Data |
Meteorological Data |
Biological Data |