LOCATION.-- Lat 39°06'14", long 88°35'39" (NAD of 1927), in NW1/4NW1/4 sec.36, T.8 N., R.5 E., Effingham County, Hydrologic Unit 05120114, on right bank at downstream side of bridge on U.S. Highway 40, 1,000 ft upstream from railroad bridge, 2.3 mi south west of Effingham, and at mile 202.8. | |
DRAINAGE AREA.-- 240 mi2. | |
PERIOD OF RECORD.-- | |
SURFACE-WATER DISCHARGE AND STAGE | |
DISCHARGE: October 1966 to current year. | |
STAGE: Water years 1994 to current year. | |
SURFACE-WATER QUALITY | |
CHEMICAL: Water years 1979-91. | |
GAGE.-- Water-stage recorder, phone telemeter, and crest-stage gage. Datum of gage is 501.10 ft above NGVD of 1929. Prior to Apr. 21, 1988, at site 0.3 mi downstream at same datum. | |
REMARKS.-- Pumpage diverted at station for municipal supply of Effingham not included in surface-water discharge records. | |
EXTREMES FOR PERIOD OF RECORD.-- | |
SURFACE-WATER DISCHARGE AND STAGE: Maximum discharge, 31,500 ft3/s, May 12, 2002, gage height 24.27 ft; no flow for many days in most years. | |
REMARKS FOR CURRENT YEAR.-- Records fair 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 | 0.00 | 1.0 | 0.64 | 35 | e5.0 | e14 | 18 | 13 | 20 | 5.0 | 13 | 1200 |
| 2 | 0.00 | 1.0 | 0.00 | 28 | e6.0 | e15 | 14 | 10 | 21 | 5.4 | 81 | 771 |
| 3 | 0.00 | 1.0 | 0.00 | 18 | e7.0 | e16 | 13 | 9.7 | 27 | 4.8 | 199 | 124 |
| 4 | 0.00 | 1.0 | 0.00 | 11 | e8.0 | 19 | 15 | 15 | 24 | 3.4 | 27 | 31 |
| 5 | 0.00 | 2.3 | 0.00 | 11 | e7.0 | 24 | 24 | 581 | 20 | 0.22 | 15 | 13 |
| 6 | 0.00 | 0.32 | 0.00 | 9.7 | e6.0 | 20 | 17 | 82 | 19 | 0.00 | 13 | 7.3 |
| 7 | 0.00 | 0.26 | 0.00 | 8.6 | e5.2 | 15 | 18 | 50 | 19 | 0.00 | 12 | 5.2 |
| 8 | 0.00 | 0.19 | 0.15 | 8.4 | e4.7 | 16 | 15 | 167 | 19 | 0.00 | 11 | 4.5 |
| 9 | 0.00 | 0.00 | 0.50 | 9.6 | e4.3 | 14 | 13 | 175 | 17 | 2.9 | 10 | 4.2 |
| 10 | 0.00 | 21 | 0.87 | 10 | e4.1 | 11 | 13 | 1520 | 31 | 1730 | 10 | 4.2 |
| 11 | 0.00 | 11 | 1.0 | 7.1 | e3.9 | 11 | 16 | 1860 | 60 | 201 | 10 | 4.3 |
| 12 | 0.00 | 2.7 | 1.2 | 1.4 | e3.8 | 13 | 11 | 267 | 153 | 99 | 9.8 | 4.1 |
| 13 | 0.00 | 1.8 | 1.2 | 0.00 | e3.7 | 21 | 9.8 | 148 | 73 | 39 | 9.6 | 3.9 |
| 14 | 0.00 | 1.3 | 1.2 | 0.00 | e8.0 | 20 | 10 | 105 | 149 | 22 | 10 | 5.0 |
| 15 | 0.00 | 1.5 | 1.2 | 0.00 | 116 | 21 | 9.8 | 155 | 74 | 56 | 9.6 | 4.2 |
| 16 | 0.00 | 1.2 | 1.2 | 0.04 | 33 | 18 | 10 | 81 | 38 | 22 | 9.3 | 3.9 |
| 17 | 0.00 | 1.1 | 1.3 | 3.7 | 28 | 17 | 22 | 67 | 25 | 13 | 12 | 3.7 |
| 18 | 0.00 | 1.0 | 5.4 | 9.5 | 29 | 19 | 13 | 55 | 17 | 20 | 10 | 3.6 |
| 19 | 0.00 | 1.2 | 33 | 7.8 | 113 | 44 | 13 | 47 | 15 | 16 | 7.1 | 3.5 |
| 20 | 0.00 | 1.2 | 20 | e6.4 | 230 | 40 | 60 | 77 | 9.6 | 14 | 6.9 | 3.1 |
| 21 | 0.00 | 1.4 | 13 | e5.4 | 107 | 50 | 27 | 52 | 9.0 | 14 | 6.8 | 3.2 |
| 22 | 0.00 | 1.4 | 12 | e4.6 | 112 | 33 | 20 | 38 | 9.2 | 9.2 | 6.9 | 5.1 |
| 23 | 0.00 | 1.2 | 11 | e4.0 | 99 | 26 | 12 | 31 | 7.4 | 8.3 | 5.9 | 3.3 |
| 24 | 0.00 | 1.2 | e10 | e3.7 | 41 | 22 | 11 | 28 | 7.0 | 6.7 | 5.9 | 3.0 |
| 25 | 5.7 | 1.2 | e9.0 | e3.4 | e23 | 24 | 18 | 34 | 6.7 | 8.4 | 6.0 | 4.8 |
| 26 | 1.2 | 1.2 | e9.5 | e3.1 | e18 | 19 | 11 | 24 | 8.3 | 8.6 | 6.1 | 15 |
| 27 | 1.3 | 1.1 | e10 | e3.0 | e16 | 17 | 9.7 | 22 | 5.9 | 3.3 | 12 | 98 |
| 28 | 1.1 | 1.0 | e11 | e3.1 | e15 | 20 | 9.4 | 59 | 5.5 | 211 | 6.0 | 26 |
| 29 | 7.1 | 1.1 | 12 | e3.3 | --- | 20 | 9.4 | 42 | 5.4 | 100 | 9.3 | 7.3 |
| 30 | 1.2 | 1.1 | 15 | e3.5 | --- | 17 | 11 | 30 | 5.2 | 22 | 6.9 | 4.5 |
| 31 | 1.1 | --- | 42 | e3.9 | --- | 17 | --- | 27 | --- | 14 | 58 | --- |
| TOTAL | 18.70 | 63.97 | 223.36 | 226.24 | 1056.7 | 653 | 473.1 | 5871.7 | 900.2 | 2659.22 | 615.1 | 2373.9 |
| MEAN | 0.60 | 2.13 | 7.21 | 7.30 | 37.7 | 21.1 | 15.8 | 189 | 30.0 | 85.8 | 19.8 | 79.1 |
| MAX | 7.1 | 21 | 42 | 35 | 230 | 50 | 60 | 1860 | 153 | 1730 | 199 | 1200 |
| MIN | 0.00 | 0.00 | 0.00 | 0.00 | 3.7 | 11 | 9.4 | 9.7 | 5.2 | 0.00 | 5.9 | 3.0 |
| CFSM | 0.00 | 0.01 | 0.03 | 0.03 | 0.16 | 0.09 | 0.07 | 0.79 | 0.13 | 0.36 | 0.08 | 0.33 |
| IN. | 0.00 | 0.01 | 0.03 | 0.04 | 0.16 | 0.10 | 0.07 | 0.91 | 0.14 | 0.41 | 0.10 | 0.37 |
| e Estimated |
| STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1967 - 2003, BY WATER YEAR (WY) | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| MEAN | 67.5 | 152 | 238 | 242 | 332 | 375 | 371 | 313 | 198 | 96.0 | 51.5 | 74.7 |
| MAX | 672 | 1141 | 1055 | 964 | 1080 | 1200 | 1225 | 1969 | 756 | 794 | 252 | 1001 |
| (WY) | 2001 | 1994 | 1968 | 1993 | 1982 | 1978 | 1996 | 2002 | 2000 | 2000 | 1974 | 1993 |
| MIN | 0.10 | 0.65 | 0.000 | 0.026 | 14.5 | 19.1 | 15.8 | 14.4 | 1.77 | 1.34 | 0.25 | 0.24 |
| (WY) | 1995 | 1977 | 1977 | 1981 | 1978 | 1972 | 2003 | 1988 | 1987 | 1972 | 1989 | 1988 |
| SUMMARY STATISTICS | FOR 2002 CALENDAR YEAR | FOR 2003 WATER YEAR | WATER YEARS 1967 - 2003 | |||
|---|---|---|---|---|---|---|
| ANNUAL TOTAL | 128454.48 | 15135.19 | ||||
| ANNUAL MEAN | 352 | 41.5 | 208 | |||
| HIGHEST ANNUAL MEAN | 450 | 1993 | ||||
| LOWEST ANNUAL MEAN | 41.5 | 2003 | ||||
| HIGHEST DAILY MEAN | 15600 | May 13 | 1860 | May 11 | 15600 | May 13 2002 |
| LOWEST DAILY MEAN | 0.00 | many days | 0.00 | many days | 0.00 | A |
| ANNUAL SEVEN-DAY MINIMUM | 0.00 | Sep 6 | 0.00 | Oct 1 | 0.00 | Oct 8 1966 |
| MAXIMUM PEAK FLOW | 3810 | May 11 | 31500 | May 12 2002 | ||
| MAXIMUM PEAK STAGE | 15.35 | May 11 | 24.27 | May 12 2002 | ||
| ANNUAL RUNOFF (CFSM) | 1.47 | 0.17 | 0.87 | |||
| ANNUAL RUNOFF (INCHES) | 19.91 | 2.35 | 11.80 | |||
| 10 PERCENT EXCEEDS | 835 | 59 | 446 | |||
| 50 PERCENT EXCEEDS | 20 | 9.7 | 36 | |||
| 90 PERCENT EXCEEDS | 0.00 | 0.00 | 0.13 | |||