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 (742.14 ft NAVD 1988). 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 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 | 926 | 1620 | 1710 | e1300 | e1600 | 3650 | 4210 | 1510 | 951 | 502 | 547 | 441 |
2 | 985 | 1680 | 1920 | e1500 | e1500 | 3530 | 4310 | 1490 | 1190 | 552 | 585 | 411 |
3 | 961 | 1610 | 1900 | e1400 | e1400 | 3470 | 4300 | 1520 | 1180 | 611 | 584 | 412 |
4 | 1010 | 1570 | 1910 | e1300 | 1190 | 3400 | 4290 | 1490 | 1180 | 519 | 562 | 461 |
5 | 1240 | 1510 | 1920 | e1400 | 1150 | 3360 | 4330 | 1480 | 1410 | 620 | 569 | 360 |
6 | 1170 | 1490 | 1990 | e1300 | 1270 | 3490 | 4310 | 1400 | 1740 | 656 | 566 | 443 |
7 | 1170 | 1540 | 2000 | e1200 | 2410 | 3820 | 4420 | 1380 | 1540 | 677 | 555 | 444 |
8 | 1260 | 1590 | 1980 | e1200 | e2300 | 3600 | 4330 | 1370 | 1170 | 594 | 472 | 497 |
9 | 1400 | 1980 | 1970 | e1200 | e2400 | 3560 | 4260 | 1320 | 787 | 594 | 456 | 452 |
10 | 1310 | 1670 | 2120 | e1300 | e2400 | 3660 | 4220 | 1270 | 779 | 585 | 554 | 398 |
11 | 1240 | 2340 | 2430 | e1300 | e2500 | 3750 | 4210 | 1720 | 752 | 569 | 443 | 423 |
12 | 959 | 2230 | 2350 | e1400 | 2790 | 3760 | 4270 | 2190 | 879 | 581 | 590 | 446 |
13 | 1030 | 1950 | 2270 | e1500 | 3050 | 3750 | 4180 | 1960 | 871 | 606 | 509 | 394 |
14 | 1240 | 1920 | 1860 | e1600 | 4840 | 3710 | 4010 | 1820 | 1040 | 609 | 515 | 389 |
15 | 1310 | 1490 | e1700 | e1800 | 4540 | 3680 | 3880 | 1900 | 971 | 553 | 561 | 421 |
16 | 974 | 1440 | e1500 | e1900 | 4210 | 3620 | 3750 | 2180 | 1040 | 521 | 457 | 396 |
17 | 951 | 1440 | e1500 | e2000 | 4200 | 3610 | 3650 | 2190 | 654 | 499 | 511 | 392 |
18 | 1160 | 1440 | e1500 | e2000 | 4260 | 3620 | 3520 | 2220 | 676 | 457 | 513 | 421 |
19 | 1190 | 1520 | e1400 | e2100 | 4310 | 3700 | 3330 | 2390 | 663 | 475 | 539 | 493 |
20 | 984 | 1910 | e1300 | e2100 | 4390 | 3790 | 3300 | 2420 | 643 | 542 | 580 | 366 |
21 | 1160 | 2140 | e1300 | e1900 | 4360 | 3750 | 3280 | 2320 | 653 | 761 | 532 | 407 |
22 | 1270 | 1770 | e1400 | e2000 | 4350 | 3780 | 3140 | 2250 | 668 | 745 | 479 | 397 |
23 | 1340 | 1380 | e1400 | e1900 | 4210 | 3840 | 3120 | 2210 | 608 | 669 | 553 | 458 |
24 | 1280 | 1390 | e1400 | e1900 | 4110 | 3850 | 2910 | 2240 | 472 | 685 | 538 | 476 |
25 | 1360 | 1640 | e1300 | e1800 | 4060 | 3930 | 2720 | 2200 | 599 | 878 | 526 | 518 |
26 | 1600 | 1690 | e1200 | e1800 | 3990 | 3970 | 2510 | 2150 | 731 | 1300 | 506 | 685 |
27 | 1690 | 1690 | e1200 | e1800 | 3910 | 3970 | 2240 | 2010 | 728 | 1540 | 482 | 524 |
28 | 1630 | 1680 | e1200 | e1800 | 3820 | 4010 | 2150 | 2000 | 807 | 1320 | 463 | 500 |
29 | 1560 | 1690 | e1200 | e1700 | --- | 4020 | 2100 | 1600 | 823 | 1120 | 450 | 482 |
30 | 1460 | 1660 | e1200 | e1700 | --- | 4080 | 1670 | 1380 | 566 | 887 | 476 | 458 |
31 | 1440 | --- | e1200 | e1700 | --- | 4080 | --- | 1070 | --- | 544 | 495 | --- |
TOTAL | 38260 | 50670 | 51230 | 50800 | 89520 | 115810 | 106920 | 56650 | 26771 | 21771 | 16168 | 13365 |
MEAN | 1234 | 1689 | 1653 | 1639 | 3197 | 3736 | 3564 | 1827 | 892 | 702 | 522 | 446 |
MAX | 1690 | 2340 | 2430 | 2100 | 4840 | 4080 | 4420 | 2420 | 1740 | 1540 | 590 | 685 |
MIN | 926 | 1380 | 1200 | 1200 | 1150 | 3360 | 1670 | 1070 | 472 | 457 | 443 | 360 |
CFSM | 0.37 | 0.51 | 0.49 | 0.49 | 0.96 | 1.12 | 1.07 | 0.55 | 0.27 | 0.21 | 0.16 | 0.13 |
IN. | 0.43 | 0.56 | 0.57 | 0.57 | 1.00 | 1.29 | 1.19 | 0.63 | 0.30 | 0.24 | 0.18 | 0.15 |
e Estimated |
STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1914 - 2005, BY WATER YEAR (WY) | ||||||||||||
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MEAN | 1391 | 1586 | 1483 | 1314 | 1572 | 3325 | 4064 | 2616 | 1919 | 1469 | 1138 | 1185 |
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 2004 CALENDAR YEAR | FOR 2005 WATER YEAR | WATER YEARS 1914 - 2005 | |||
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ANNUAL TOTAL | 1113588 | 637935 | ||||
ANNUAL MEAN | 3043 | 1748 | 1925 | |||
HIGHEST ANNUAL MEAN | 3925 | 1993 | ||||
LOWEST ANNUAL MEAN | 557 | 1964 | ||||
HIGHEST DAILY MEAN | 9910 | Jun 4 | 4840 | Feb 14 | 13000 | Mar 23 1929 |
LOWEST DAILY MEAN | 650 A | Feb 4,9 | 360 | Sep 5 | 42 | Aug 25 1934 |
ANNUAL SEVEN-DAY MINIMUM | 726 | Feb 4 | 408 | Sep 12 | 115 | Aug 24 1934 |
MAXIMUM PEAK FLOW | 5050 | Feb 14 | 13000 B | Mar 23 1929 | ||
MAXIMUM PEAK STAGE | 7.67 | Feb 14 | 13.05 C | Feb 5 1916 | ||
ANNUAL RUNOFF (CFSM) | 0.911 | 0.523 | 0.576 | |||
ANNUAL RUNOFF (INCHES) | 12.40 | 7.11 | 7.83 | |||
10 PERCENT EXCEEDS | 7770 | 3860 | 4060 | |||
50 PERCENT EXCEEDS | 1920 | 1440 | 1360 | |||
90 PERCENT EXCEEDS | 985 | 489 | 486 |
Table of Contents |
Introduction |
Station Descriptions |
Surface-Water Data |
Ground-Water Data |
Meteorological Data |
Biological Data |