LOCATION.-- Lat 42°36'42", long 89°23'53" (NAD of 1927), in SW 1/4 sec.26, T.2 N., R.9 E., Green County, Hydrologic Unit 07090004, on left bank at downstream side of highway bridge, 1.2 mi southwest of Brodhead, and 1.9 mi upstream from Sylvester Creek. |
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DRAINAGE AREA.-- 523 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 and February 1914 published in WSP 1308. |
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REVISED RECORDS.-- WSP 1238: 1914-16, 1918, 1922, 1927, 1933. WSP 1508: 1916-17(M), 1919(M), 1920, 1921(M), 1927-28(M), 1930(M), 1931, 1936(M), 1943(M). WDR WI-73-1: Drainage area. |
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GAGE.-- Water-stage recorder and phone telemeter. Datum of gage is 768.14 ft above NGVD of 1929. Prior to Oct. 17, 1938, nonrecording gage 20 ft upstream at same datum. |
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REMARKS.-- Some regulation from dam and non-operational powerplant upstream. |
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EXTREMES FOR PERIOD OF RECORD.-- |
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SURFACE-WATER DISCHARGE AND STAGE: Maximum discharge, 14,800 ft3/s. September 13, 1915, from rating curve extended above 7,500 ft3/s, gage height, 11.40 feet, from floodmarks; minimum discharge, 35 ft3/s, September 19, 1959. |
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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 | 402 | 433 | 420 | e300 | e310 | 407 | 383 | 441 | 344 | 330 | 248 | 238 |
2 | 383 | 413 | 424 | e290 | e290 | e370 | 389 | 436 | 334 | 323 | 239 | 256 |
3 | 381 | 401 | 417 | e290 | e280 | e340 | 396 | 431 | 359 | 315 | 233 | 272 |
4 | 371 | 389 | 405 | e310 | e280 | e330 | 396 | 424 | 802 | 308 | 235 | 283 |
5 | 372 | 382 | 401 | e310 | e280 | e330 | 386 | 404 | 1290 | 300 | 250 | 262 |
6 | 370 | 375 | 406 | e310 | e280 | e340 | 377 | 394 | 1270 | 299 | 259 | 247 |
7 | 362 | 371 | 425 | e310 | e280 | e350 | 392 | 390 | 1270 | 304 | 248 | 241 |
8 | 355 | 371 | 427 | e320 | e280 | e380 | 533 | 387 | 953 | 304 | 239 | 236 |
9 | 356 | 365 | 409 | 334 | 319 | 624 | 1020 | 389 | 616 | 303 | 233 | 235 |
10 | 371 | 363 | 395 | 345 | 384 | 784 | 1090 | 379 | 521 | 299 | 228 | 233 |
11 | 398 | 357 | 383 | 353 | 476 | 824 | 1090 | 378 | 511 | 294 | 221 | 232 |
12 | 416 | 353 | 381 | 354 | 482 | 747 | 866 | 412 | 528 | 290 | 222 | 234 |
13 | 402 | 364 | 415 | e350 | 399 | 583 | 641 | 490 | 528 | 284 | 275 | 235 |
14 | 401 | 386 | 475 | e350 | 373 | 527 | 567 | 528 | 491 | 280 | 283 | 235 |
15 | 406 | 396 | 488 | e330 | 364 | 516 | 510 | 461 | 478 | 275 | 273 | 235 |
16 | 399 | 384 | 457 | e310 | 359 | 487 | 493 | 425 | 465 | 270 | 251 | 233 |
17 | 379 | 371 | 447 | e290 | 353 | 464 | 478 | 403 | 438 | 263 | 238 | 234 |
18 | 396 | 360 | 441 | e280 | 347 | 448 | 455 | 390 | 421 | 261 | 232 | 236 |
19 | 378 | 361 | 428 | e280 | 365 | 438 | 449 | 379 | 407 | 258 | 228 | 263 |
20 | 364 | 363 | 412 | e280 | 515 | 439 | 453 | 372 | 396 | 251 | 225 | 327 |
21 | 360 | 362 | 395 | e290 | 755 | 455 | 468 | 366 | 394 | 274 | 225 | 337 |
22 | 368 | 356 | 388 | e310 | 817 | 444 | 460 | 358 | 385 | 281 | 316 | 304 |
23 | 598 | 352 | 405 | 345 | 752 | 421 | 453 | 357 | 376 | 282 | 405 | 278 |
24 | 798 | 381 | e390 | 342 | 576 | 414 | 448 | 353 | 365 | 277 | 380 | 265 |
25 | 882 | 470 | e360 | 330 | 515 | 403 | 425 | 364 | 355 | 247 | 321 | 260 |
26 | 833 | 536 | e350 | 328 | 495 | 395 | 401 | 382 | 351 | 274 | 278 | 260 |
27 | 669 | 516 | e340 | 328 | 464 | 387 | 412 | 395 | 353 | 260 | 252 | 259 |
28 | 518 | 465 | e340 | 331 | 431 | 387 | 435 | 375 | 352 | 259 | 252 | 257 |
29 | 473 | 442 | e320 | 330 | --- | 393 | 458 | 363 | 344 | 265 | 249 | 310 |
30 | 445 | 414 | e310 | 326 | --- | 394 | 467 | 360 | 337 | 268 | 244 | 400 |
31 | 453 | --- | e300 | 327 | --- | 387 | --- | 362 | --- | 261 | 239 | --- |
TOTAL | 14059 | 11852 | 12354 | 9883 | 11821 | 14208 | 15791 | 12348 | 16034 | 8759 | 8021 | 7897 |
MEAN | 453.5 | 395.1 | 398.5 | 318.8 | 422.2 | 458.3 | 526.4 | 398.3 | 534.5 | 282.5 | 258.7 | 263.2 |
MAX | 882 | 536 | 488 | 354 | 817 | 824 | 1090 | 528 | 1290 | 330 | 405 | 400 |
MIN | 355 | 352 | 300 | 280 | 280 | 330 | 377 | 353 | 334 | 247 | 221 | 232 |
CFSM | 0.87 | 0.76 | 0.76 | 0.61 | 0.81 | 0.88 | 1.01 | 0.76 | 1.02 | 0.54 | 0.49 | 0.50 |
IN. | 1.00 | 0.84 | 0.88 | 0.70 | 0.84 | 1.01 | 1.12 | 0.88 | 1.14 | 0.62 | 0.57 | 0.56 |
e Estimated |
STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1914 - 2002, BY WATER YEAR (WY) | ||||||||||||
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MEAN | 286.5 | 308.2 | 272.5 | 294.5 | 432.3 | 657.0 | 464.9 | 374.6 | 377.0 | 303.9 | 261.4 | 298.5 |
MAX | 788 | 836 | 597 | 1168 | 1690 | 1698 | 1159 | 1368 | 1320 | 1248 | 694 | 1579 |
(WY) | 1928 | 1962 | 1929 | 1916 | 1938 | 1929 | 1993 | 1973 | 2000 | 1993 | 1924 | 1938 |
MIN | 126 | 127 | 120 | 89.4 | 127 | 181 | 198 | 140 | 113 | 117 | 105 | 106 |
(WY) | 1965 | 1965 | 1956 | 1956 | 1959 | 1934 | 1938 | 1934 | 1934 | 1958 | 1934 | 1958 |
SUMMARY STATISTICS | FOR 2001 CALENDAR YEAR | FOR 2002 WATER YEAR | WATER YEARS 1914 - 2002 | |||
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ANNUAL TOTAL | 165356 | 143027 | ||||
ANNUAL MEAN | 453.0 | 391.9 | 360.6 | |||
HIGHEST ANNUAL MEAN | 694 | 1993 | ||||
LOWEST ANNUAL MEAN | 172 | 1934 | ||||
HIGHEST DAILY MEAN | 1150 | Jun 13 | 1290 | Jun 5 | 10800 | Mar 14 1929 |
LOWEST DAILY MEAN | 250 | Jan 12 | 221 | Aug 11 | 51 | Jun 13 1934 |
ANNUAL SEVEN-DAY MINIMUM | 250 | Jan 12 | 234 | Sep 10 | 71 | Jun 28 1934 |
MAXIMUM PEAK FLOW | 1410 | Jun 5 | 14800 | Sep 13 1915 | ||
MAXIMUM PEAK STAGE | 4.41 | Jun 5 | 11.40 | Sep 13 1915 | ||
INSTANTANEOUS LOW FLOW | 35 | Sep 19 1959 | ||||
ANNUAL RUNOFF (CFSM) | 0.87 | 0.75 | 0.69 | |||
ANNUAL RUNOFF (INCHES) | 11.76 | 10.17 | 9.37 | |||
10 PERCENT EXCEEDS | 704 | 515 | 587 | |||
50 PERCENT EXCEEDS | 413 | 370 | 264 | |||
90 PERCENT EXCEEDS | 273 | 252 | 150 |
Table of Contents |
Introduction |
Station Descriptions |
Surface-Water Data |
Ground-Water Data |
Meteorological Data |
Biological Data |