LOCATION.-- Lat 39°48'55", long 89°41'55" (NAD of 1927), in NW1/4NE1/4 sec.30, T.16 N., R.5 W., Sangamon County, Hydrologic Unit 07130008, on right bank at downstream side of bridge on State Highways 125 and 97 (Jefferson Street), 0.1 mi east of intersection of State Highway 4 (Veterans Parkway) and State Highways 125 and 97 (Jefferson Street), in Springfield, and at mile 8.2. | |
DRAINAGE AREA.-- 107 mi2. | |
PERIOD OF RECORD.-- | |
SURFACE-WATER DISCHARGE AND STAGE | |
DISCHARGE: January to February 1948, April to June 1948, December 1948 to current year. | |
STAGE: Water years 1994 to current year. | |
GAGE.-- Water-stage recorder, phone telemeter, and crest-stage gage. Datum of gage is 524.65 ft above NGVD of 1929. Prior to Dec. 22, 1948, and Mar. 24, 1981 to Mar. 30, 1983, nonrecording gage at same site and datum. | |
EXTREMES FOR PERIOD OF RECORD.-- | |
SURFACE-WATER DISCHARGE AND STAGE: Maximum discharge, 10,700 ft3/s, May 8, 1996, gage height, 16.23 ft; no flow for many days in most years. | |
REMARKS FOR CURRENT YEAR.-- Records 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 | 0.09 | 1.4 | 0.95 | 1.9 | 9.4 | e3.1 | 32 | 39 | 35 | 66 | 1.6 | 368 |
| 2 | 0.17 | 0.62 | 0.93 | 2.5 | 8.1 | e3.0 | 33 | 33 | 36 | 59 | 1.1 | 98 |
| 3 | 3.1 | 0.75 | 0.91 | 2.7 | 7.8 | e2.7 | 31 | 28 | 48 | 55 | 1.2 | 22 |
| 4 | 7.2 | 0.94 | 0.99 | 2.1 | 5.2 | e2.5 | 35 | 37 | 43 | 50 | 13 | 12 |
| 5 | 3.9 | 4.3 | 0.97 | 2.1 | 4.2 | e2.6 | 32 | 55 | 35 | 46 | 3.9 | 8.4 |
| 6 | 2.0 | 2.8 | 0.77 | 2.0 | e3.5 | e2.8 | 31 | 51 | 44 | 39 | 3.1 | 6.4 |
| 7 | 2.2 | 1.8 | 0.62 | 2.0 | e3.0 | e3.3 | 62 | 41 | 38 | 39 | 2.1 | 5.1 |
| 8 | 1.9 | 1.4 | 0.56 | 1.8 | e2.6 | e4.0 | 40 | 53 | 35 | 32 | 1.6 | 4.7 |
| 9 | 1.3 | 1.0 | 0.43 | 1.7 | e2.2 | e5.2 | 33 | 65 | 30 | 57 | 2.3 | 4.9 |
| 10 | 0.97 | e0.78 | 0.31 | 1.5 | e1.9 | e7.0 | 30 | 279 | 43 | 182 | 1.7 | 5.0 |
| 11 | 0.56 | e0.68 | 0.26 | 1.3 | e1.5 | e11 | 29 | 336 | 100 | 62 | 1.1 | 3.8 |
| 12 | 0.27 | e0.66 | 0.30 | 1.1 | e1.4 | 18 | 27 | 203 | 183 | 40 | 1.6 | 5.5 |
| 13 | 0.18 | e0.64 | 0.38 | 1.0 | e1.6 | 74 | 24 | 143 | 222 | 32 | 2.3 | 5.6 |
| 14 | 0.12 | 1.1 | 0.38 | e0.88 | e1.7 | 55 | 22 | 116 | 379 | 26 | 2.3 | 4.8 |
| 15 | 0.09 | 3.6 | 0.38 | e0.84 | e1.8 | 36 | 21 | 100 | 253 | 22 | 2.3 | 3.8 |
| 16 | 0.07 | 2.8 | 0.40 | e0.78 | e1.7 | 31 | 24 | 84 | 157 | 17 | 1.9 | 3.1 |
| 17 | 0.16 | 1.8 | 0.46 | e0.73 | e1.6 | 28 | 31 | 85 | 118 | 14 | 1.6 | 2.2 |
| 18 | 12 | 1.4 | 20 | e0.70 | e1.8 | 26 | 46 | 90 | 100 | 42 | 1.6 | 1.3 |
| 19 | 33 | 1.2 | 1.9 | e0.66 | e2.1 | 49 | 37 | 73 | 84 | 70 | 1.5 | 0.70 |
| 20 | 2.6 | 1.2 | 1.6 | e0.61 | e2.8 | 97 | 37 | 64 | 73 | 28 | 1.3 | 0.74 |
| 21 | 1.9 | 1.4 | 0.91 | e0.58 | e7.0 | 99 | 30 | 54 | 64 | 28 | 1.0 | 1.2 |
| 22 | 1.6 | 2.2 | 0.88 | e0.56 | e13 | 70 | 26 | 50 | 58 | 15 | 0.66 | 1.7 |
| 23 | 1.6 | 1.9 | 0.80 | e0.54 | e9.6 | 56 | 22 | 47 | 54 | 10 | 0.47 | 2.0 |
| 24 | 1.4 | 1.6 | 0.96 | e0.52 | e8.0 | 47 | 34 | 49 | 49 | 6.9 | 0.35 | 2.3 |
| 25 | 6.3 | 1.4 | 1.4 | e0.52 | e6.8 | 43 | 46 | 59 | 116 | 4.7 | 0.22 | 1.9 |
| 26 | 1.1 | 1.3 | 1.3 | e0.54 | e5.6 | 40 | 37 | 48 | 299 | 4.0 | 0.13 | 17 |
| 27 | 1.2 | 1.3 | 1.3 | e0.56 | e4.5 | 37 | 33 | 41 | 137 | 3.4 | 0.04 | 11 |
| 28 | 0.76 | 1.3 | 1.5 | e0.60 | e3.7 | 44 | 34 | 37 | 96 | 40 | 0.00 | 4.1 |
| 29 | 11 | 1.2 | 2.2 | e1.1 | --- | 41 | 30 | 38 | 114 | 14 | 0.00 | 2.4 |
| 30 | 3.3 | 1.1 | 3.2 | 1.8 | --- | 36 | 29 | 38 | 91 | 7.0 | 0.01 | 2.0 |
| 31 | 3.2 | --- | 2.1 | 3.3 | --- | 32 | --- | 38 | --- | 3.8 | 113 | --- |
| TOTAL | 105.24 | 45.57 | 50.05 | 39.52 | 124.1 | 1006.2 | 978 | 2474 | 3134 | 1114.8 | 164.98 | 611.64 |
| MEAN | 3.39 | 1.52 | 1.61 | 1.27 | 4.43 | 32.5 | 32.6 | 79.8 | 104 | 36.0 | 5.32 | 20.4 |
| MAX | 33 | 4.3 | 20 | 3.3 | 13 | 99 | 62 | 336 | 379 | 182 | 113 | 368 |
| MIN | 0.07 | 0.62 | 0.26 | 0.52 | 1.4 | 2.5 | 21 | 28 | 30 | 3.4 | 0.00 | 0.70 |
| CFSM | 0.03 | 0.01 | 0.02 | 0.01 | 0.04 | 0.30 | 0.30 | 0.75 | 0.98 | 0.34 | 0.05 | 0.19 |
| IN. | 0.04 | 0.02 | 0.02 | 0.01 | 0.04 | 0.35 | 0.34 | 0.86 | 1.09 | 0.39 | 0.06 | 0.21 |
| e Estimated |
| STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1948 - 2003, BY WATER YEAR (WY) | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| MEAN | 21.7 | 28.7 | 52.9 | 56.5 | 84.5 | 109 | 128 | 128 | 97.9 | 42.4 | 25.7 | 20.1 |
| MAX | 244 | 225 | 523 | 282 | 281 | 374 | 605 | 617 | 418 | 358 | 292 | 296 |
| (WY) | 1960 | 1986 | 1983 | 1950 | 1975 | 1978 | 1957 | 1996 | 1990 | 1981 | 1981 | 1993 |
| MIN | 0.000 | 0.000 | 0.000 | 0.000 | 0.22 | 0.23 | 0.66 | 0.052 | 8.05 | 1.38 | 0.016 | 0.000 |
| (WY) | 1954 | 1954 | 1954 | 1956 | 1954 | 1954 | 1954 | 1954 | 1953 | 1976 | 1953 | 1952 |
| SUMMARY STATISTICS | FOR 2002 CALENDAR YEAR | FOR 2003 WATER YEAR | WATER YEARS 1948 - 2003 | |||
|---|---|---|---|---|---|---|
| ANNUAL TOTAL | 36977.35 | 9848.10 | ||||
| ANNUAL MEAN | 101 | 27.0 | 66.9 | |||
| HIGHEST ANNUAL MEAN | 156 | 1993 | ||||
| LOWEST ANNUAL MEAN | 2.15 | 1954 | ||||
| HIGHEST DAILY MEAN | 3530 | May 12 | 379 | Jun 14 | 5320 | May 8 1996 |
| LOWEST DAILY MEAN | 0.01 A | 0.00 | Aug 28, 29 | 0.00 | B | |
| ANNUAL SEVEN-DAY MINIMUM | 0.14 | Sep 8 | 0.11 | Aug 24 | 0.00 | B |
| MAXIMUM PEAK FLOW | 668 | Jun 25 | 10700 | May 8 1996 | ||
| MAXIMUM PEAK STAGE | 8.40 | Jun 25 | 16.23 | May 8 1996 | ||
| ANNUAL RUNOFF (CFSM) | 0.95 | 0.25 | 0.62 | |||
| ANNUAL RUNOFF (INCHES) | 12.86 | 3.42 | 8.49 | |||
| 10 PERCENT EXCEEDS | 235 | 65 | 153 | |||
| 50 PERCENT EXCEEDS | 15 | 3.9 | 21 | |||
| 90 PERCENT EXCEEDS | 0.53 | 0.62 | 0.04 | |||
|