LOCATION.-- Lat 42°36'33", long 89°04'14" (NAD of 1927), in NE 1/4 sec.28, T.2 N., R.12 E., Rock County, Hydrologic Unit 07090001, on right bank in Afton, 0.3 mi downstream from highway bridge and 1.1 mi upstream from Bass Creek. |
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DRAINAGE AREA.-- 3,340 mi2. |
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PERIOD OF RECORD.-- |
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SURFACE-WATER DISCHARGE AND STAGE |
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DISCHARGE: January 1914 to current year. Monthly discharge for January 1914 published in WSP 1308. |
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REVISED RECORDS.-- WSP 1238: 1916(M), 1919(M), 1933, 1937-38, 1943. WDR WI-79-1: Drainage area. |
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GAGE.-- Water-stage recorder and satellite telemeter. Datum of gage is 742.36 ft above NGVD of 1929. Prior to Aug. 23, 1932, a nonrecording gage 20 ft upstream, and Aug. 23, 1932, to Sept. 30, 1933, water-stage recorder, at same site at datum 1 ft higher. |
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REMARKS.-- Diurnal fluctuation caused by powerplants above station. |
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EXTREMES FOR PERIOD OF RECORD.-- |
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SURFACE-WATER DISCHARGE AND STAGE: Maximum discharge, 13,000 ft3/s, March 23 and 24, 1929, gage height, 11.81 ft, present datum; maximum gage height, 13.05 ft, February 5, 1916, present datum, backwater from ice; minimum daily discharge, 42 ft3/s, August 25 and 26, 1934. |
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REMARKS FOR CURRENT YEAR.-- Records good except those for estimated daily discharges, which are fair, and periods of discharge below 800 ft3/s, which are poor. |
Discharge, cubic feet per second, WATER YEAR OCTOBER 2003 TO SEPTEMBER 2004 DAILY MEAN VALUES |
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DAY | OCT | NOV | DEC | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP |
1 | 517 | 1100 | 2140 | 2260 | e840 | 1910 | 4460 | 2860 | 9860 | 7910 | 2930 | 1750 |
2 | 599 | 1290 | 2100 | 2150 | e840 | 2320 | 4420 | 2740 | 9820 | 7660 | 2830 | 1730 |
3 | 527 | 1540 | 2250 | 1860 | e700 | 2400 | 4360 | 2650 | 9880 | 7530 | 2760 | 1690 |
4 | 467 | 2050 | 2260 | 1810 | e650 | 2540 | 4330 | 2450 | 9910 | 7710 | 2950 | 1580 |
5 | 528 | 2230 | 2240 | 1670 | e800 | 3140 | 4190 | 2360 | 9860 | 7680 | 2960 | 1520 |
6 | 505 | 2120 | 2270 | 1470 | e790 | 3330 | 4060 | 2270 | 9790 | 7200 | 2870 | 1440 |
7 | 595 | 2090 | 2160 | e1400 | e780 | 3360 | 4080 | 2260 | 9630 | 7060 | 2800 | 1440 |
8 | 549 | 2410 | 2030 | e1400 | e750 | 3640 | 3980 | 1980 | 9380 | 6760 | 2660 | 1440 |
9 | 545 | 2320 | 2040 | e1300 | e650 | 4010 | 3890 | 1940 | 9310 | 6590 | 2600 | 1010 |
10 | 593 | 2150 | 2450 | e1300 | e660 | 4160 | 3800 | 2020 | 9300 | 6440 | 2510 | 1070 |
11 | 597 | 2090 | 2430 | e1300 | e960 | 4190 | 3710 | 2310 | 9410 | 6190 | 2620 | 1080 |
12 | 556 | 2040 | 2170 | e1300 | e1100 | 4240 | 3630 | 2570 | 9460 | 5960 | 2580 | 1020 |
13 | 597 | 1930 | 2170 | e1300 | e1000 | 4320 | 3510 | 2620 | 9340 | 5780 | 2520 | 1130 |
14 | 758 | 2260 | 2210 | e1300 | e900 | 4230 | 3400 | 2800 | 9400 | 5580 | 2200 | 1330 |
15 | 794 | 2140 | 2270 | e1300 | e900 | 4270 | 3290 | 2930 | 9470 | 5430 | 1650 | 1220 |
16 | 844 | 2110 | 2630 | e1300 | e900 | 4380 | 3140 | 2980 | 9470 | 5280 | 1680 | 1200 |
17 | 934 | 2000 | 2610 | e1300 | e900 | 4340 | 3200 | 3010 | 9730 | 5260 | 1620 | 1300 |
18 | 934 | 2130 | 2590 | e1300 | e880 | 4270 | 3050 | 3270 | 9700 | 5100 | 1750 | 1250 |
19 | 896 | 2310 | 2540 | e1200 | e890 | 4100 | 2660 | 3480 | 9550 | 4860 | 1670 | 1220 |
20 | 949 | 2100 | 2470 | e1100 | e910 | 4210 | 2910 | 3510 | 9420 | 4670 | 1570 | 1160 |
21 | 761 | 2330 | 2430 | e1100 | e980 | 4190 | 3030 | 3760 | 9350 | 4560 | 1370 | 914 |
22 | 899 | 2290 | 2260 | e1100 | e1100 | 4090 | 3010 | 5310 | 9360 | 4390 | 1350 | 868 |
23 | 837 | 2130 | 1960 | e1100 | 1280 | 3960 | 3070 | 6340 | 9140 | 4410 | 1320 | 856 |
24 | 930 | 1870 | 1980 | e1100 | 1490 | 3950 | 3080 | 7010 | 9060 | 4170 | 1140 | 758 |
25 | 972 | 1940 | 1950 | e1100 | 1420 | 3930 | 3100 | 7080 | 8970 | 4000 | 1160 | 775 |
26 | 825 | 2050 | 1970 | e1000 | 1610 | 4120 | 2970 | 7480 | 8810 | 3820 | 1330 | 1010 |
27 | 789 | 2310 | 1960 | e900 | 1610 | 4300 | 2950 | 7930 | 8660 | 3600 | 1430 | 1000 |
28 | 1310 | 2270 | 1980 | e790 | 1700 | 4240 | 2850 | 8320 | 8590 | 3430 | 1620 | 1050 |
29 | 1270 | 2200 | 2040 | e800 | 1720 | 4210 | 2650 | 8550 | 8320 | 3280 | 1610 | 1040 |
30 | 1290 | 2180 | 2280 | e830 | --- | 4350 | 2790 | 8910 | 8090 | 3170 | 1540 | 957 |
31 | 1150 | --- | 2290 | e830 | --- | 4500 | --- | 9500 | --- | 3080 | 1770 | --- |
TOTAL | 24317 | 61980 | 69130 | 39970 | 29710 | 119200 | 103570 | 133200 | 280040 | 168560 | 63370 | 35808 |
MEAN | 784 | 2066 | 2230 | 1289 | 1024 | 3845 | 3452 | 4297 | 9335 | 5437 | 2044 | 1194 |
MAX | 1310 | 2410 | 2630 | 2260 | 1720 | 4500 | 4460 | 9500 | 9910 | 7910 | 2960 | 1750 |
MIN | 467 | 1100 | 1950 | 790 | 650 | 1910 | 2650 | 1940 | 8090 | 3080 | 1140 | 758 |
CFSM | 0.23 | 0.62 | 0.67 | 0.39 | 0.31 | 1.15 | 1.03 | 1.29 | 2.79 | 1.63 | 0.61 | 0.36 |
IN. | 0.27 | 0.69 | 0.77 | 0.45 | 0.33 | 1.33 | 1.15 | 1.48 | 3.12 | 1.88 | 0.71 | 0.40 |
e Estimated |
STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1914 - 2004, BY WATER YEAR (WY) | ||||||||||||
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MEAN | 1393 | 1585 | 1481 | 1311 | 1554 | 3321 | 4069 | 2624 | 1930 | 1478 | 1145 | 1194 |
MAX | 8219 | 5884 | 4395 | 3558 | 5647 | 8958 | 10010 | 7911 | 9335 | 5443 | 5376 | 5088 |
(WY) | 1987 | 1986 | 1986 | 1960 | 1938 | 1918 | 1979 | 1973 | 2004 | 1993 | 1924 | 1938 |
MIN | 254 | 397 | 383 | 275 | 327 | 610 | 1002 | 389 | 314 | 247 | 183 | 212 |
(WY) | 1940 | 1964 | 1940 | 1959 | 1959 | 1940 | 1931 | 1958 | 1934 | 1934 | 1934 | 1939 |
SUMMARY STATISTICS | FOR 2003 CALENDAR YEAR | FOR 2004 WATER YEAR | WATER YEARS 1914 - 2004 | |||
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ANNUAL TOTAL | 466271 | 1128855 | ||||
ANNUAL MEAN | 1277 | 3084 | 1927 | |||
HIGHEST ANNUAL MEAN | 3925 | 1993 | ||||
LOWEST ANNUAL MEAN | 557 | 1964 | ||||
HIGHEST DAILY MEAN | 3630 | May 15 | 9910 | Jun 4 | 13000 | Mar 23 1929 |
LOWEST DAILY MEAN | 335 | Aug 27 | 467 | Oct 4 | 42 | Aug 25 1934 |
ANNUAL SEVEN-DAY MINIMUM | 391 | Sep 1 | 531 | Oct 3 | 115 | Aug 24 1934 |
MAXIMUM PEAK FLOW | 9930 | Jun 1 | 13000 A | Mar 23 1929 | ||
MAXIMUM PEAK STAGE | 10.96 | Jun 1 | 13.05 B | Feb 5 1916 | ||
ANNUAL RUNOFF (CFSM) | 0.382 | 0.923 | 0.577 | |||
ANNUAL RUNOFF (INCHES) | 5.19 | 12.57 | 7.84 | |||
10 PERCENT EXCEEDS | 2410 | 7770 | 4070 | |||
50 PERCENT EXCEEDS | 960 | 2260 | 1360 | |||
90 PERCENT EXCEEDS | 528 | 852 | 486 |
Table of Contents |
Introduction |
Station Descriptions |
Surface-Water Data |
Ground-Water Data |
Meteorological Data |
Biological Data |