Water Data Report 1997
04209000 CHAGRIN RIVER AT WILLOUGHBY, OHIO
LOCATION.--Lat 41037'51", long 81024'13", in T.9 N., R.10 W., Lake County, Hydrologic Unit 04110003, on left bank,
150 ft downstream from city waterworks dam, 800 ft downstream from East Branch, 1.0 mi southeast of Willoughby,
and 5.0 mi upstream from mouth.
DRAINAGE AREA.--246 mi2.
PERIOD OF RECORD.--July 1925 to November 1935, October 1939 to 1984, March 25, 1988 to September 1994, October 1,
1995, to September, 1996. (July 1925 to September 1932 monthly runoff in inches, adjusted for diversion, published
in WSP 1307; previously published runoff was unadjusted and should not be used).
REVISED RECORDS.--WSP 1084: 1929(M), 1931(M). WSP 1307: 1926-28(M), 1930(M), 1932-35(M), 1942(M). WSP 1912: Drainage
area. See also PERIOD OF RECORD.
GAGE.--Water-stage recorder. Datum of gage is 594.57 ft above sea level. Prior to Dec. 20, 1939, nonrecording gage
at site 150 ft upstream at datum 7 ft higher.
REMARKS.--Records fair except for periods of estimated record, which are poor. Water diverted 200 ft upstream from
station for municipal supply of city of Willoughby until 1988, when water treatment plant was relocated downstream
of gaging station. Water-quality and sediment data collected at this site.
DISCHARGE, CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1996 TO SEPTEMBER 1997
DAILY MEAN VALUES
DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP
1 204 235 3180 e250 e210 679 e500 219 6190 86 37 74
2 159 192 1250 360 e190 1860 e350 248 5330 95 36 89
3 132 186 532 360 e240 779 e280 928 2550 114 39 104
4 111 189 489 320 609 523 e250 1140 834 81 60 80
5 101 176 430 400 1660 478 e230 414 497 71 72 78
6 94 163 430 e310 e900 e1300 e210 1490 341 66 51 69
7 84 159 380 e260 e450 e1000 e190 518 268 62 35 58
8 81 715 337 e230 e300 e680 e180 365 232 61 32 54
9 121 1030 321 e210 e250 e560 e170 418 209 77 31 55
10 317 1160 317 e190 e210 1460 e160 785 193 84 32 105
11 204 849 1380 e170 e190 667 179 550 182 69 42 125
12 143 671 2100 e160 e160 e520 1400 368 365 61 62 108
13 114 595 661 e150 e150 e400 1240 296 322 56 138 94
14 98 545 413 e140 e130 e2000 507 242 206 56 108 81
15 85 476 337 e130 e120 e1300 366 310 170 68 81 74
16 80 448 337 e200 e110 e640 309 417 170 55 165 71
17 77 486 1800 e250 e110 e450 381 323 546 49 333 67
18 632 2480 755 e160 169 e380 383 253 204 47 215 74
19 2800 1610 e460 e130 660 e340 315 1200 218 57 113 68
20 2670 1070 e350 e120 757 304 254 809 186 53 79 1280
21 1000 848 e280 e110 436 275 215 361 148 52 231 420
22 593 736 e250 e100 364 386 250 259 149 80 1130 186
23 417 678 379 e200 e270 e500 281 208 132 64 728 137
24 380 685 2120 e450 e220 e400 343 172 115 57 249 116
25 292 1590 e1100 e800 e180 361 419 637 106 54 240 100
26 237 3670 e500 e640 163 749 278 665 216 55 170 93
27 200 880 337 e900 6640 438 218 267 149 59 124 81
28 216 511 397 e1100 1600 347 372 190 101 57 102 76
29 185 e404 399 e800 --- 382 321 232 87 52 89 74
30 476 619 323 e400 --- e580 236 329 82 43 81 112
31 367 --- 289 e260 --- e650 --- 464 --- 38 77 ---
TOTAL 12670 24056 22633 10260 17448 21388 10787 15077 20498 1979 4982 4203
MEAN 409 802 730 331 623 690 360 486 683 63.8 161 140
MAX 2800 3670 3180 1100 6640 2000 1400 1490 6190 114 1130 1280
MIN 77 159 250 100 110 275 160 172 82 38 31 54
CFSM 1.66 3.26 2.97 1.35 2.53 2.80 1.46 1.98 2.78 .26 .65 .57
IN. 1.92 3.64 3.42 1.55 2.64 3.23 1.63 2.28 3.10 .30 .75 .64
STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1925 - 1997, BY WATER YEAR (WY)
MEAN 158 314 423 478 553 693 546 361 218 129 123 129
MAX 976 850 1284 1312 1242 1234 1409 1088 781 698 602 641
(WY) 1927 1984 1991 1952 1982 1963 1957 1989 1947 1969 1992 1926
MIN 21.9 44.3 60.4 115 48.1 179 120 53.4 23.1 20.3 16.8 17.6
(WY) 1954 1965 1964 1977 1934 1990 1946 1934 1934 1934 1930 1933
SUMMARY STATISTICS FOR 1996 CALENDAR YEAR FOR 1997 WATER YEAR WATER YEARS 1925 - 1997
ANNUAL TOTAL 171844 165981
ANNUAL MEAN 470 455 342
HIGHEST ANNUAL MEAN 465 1975
LOWEST ANNUAL MEAN 148 1934
HIGHEST DAILY MEAN 5200 Jan 19 6640 Feb 27 12300 Mar 22 1948
LOWEST DAILY MEAN 40 Sep 5 31 Aug 9 3.0 Jul 25 1934
ANNUAL SEVEN-DAY MINIMUM 43 Aug 31 41 Aug 6 7.0 Aug 25 1933
INSTANTANEOUS PEAK FLOW 14900 Feb 27 a 28000 Mar 22 1948
INSTANTANEOUS PEAK STAGE 14.22 Feb 27 17.95 Mar 22 1948
INSTANTANEOUS LOW FLOW 28 Aug 8 3.0 Jul 25 1934
ANNUAL RUNOFF (CFSM) 1.91 1.85 1.39
ANNUAL RUNOFF (INCHES) 25.99 25.10 18.89
10 PERCENT EXCEEDS 1060 1000 779
50 PERCENT EXCEEDS 279 250 150
90 PERCENT EXCEEDS 66 68 36
a Peaks above base shown in table of peak discharges and stages at continuous-record surface-water-discharge stations.
e Estimated.
U.S. Department of the Interior |
U.S. Geological Survey
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