U.S. Geological Survey
Water Resources Data - Ohio, Water Year 97, Vol. 2 | Sandusky River Basin

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                                      04197170 ROCK CREEK AT TIFFIN, OHIO


LOCATION.--Lat 41006'49", long 83010'06", Seneca County, Hydrologic Unit 04100011, on left bank 0.05 mi downstream 
from bridge on Rebecca Street, at Heidelberg College, Tiffin, Ohio.
DRAINAGE AREA.--34.6 mi2.
PERIOD OF RECORD.--June 1983 to current year.
GAGE.--Water-stage recorder. Elevation of gage is 740 ft above sea level, from topographic map.
REMARKS.--Records fair except for periods of estimated record, which are poor.


			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      1.1       2.5     45       11       e7.6       75     38        9.6   1410       34        2.8      2.8
   2       .94      2.1     56       10       e7.0      372     21        9.6    666       13        3.6      2.6
   3       .93      2.0     17       11       17         97     16       21      107        8.6      2.8      2.6
   4      1.0       1.9      9.2     12      250         42     16       58       60        7.0      8.8      2.4
   5      1.1       1.9      7.2     52      518         32     24       26       34        6.0      7.5      2.4
 
   6      1.0       1.9      6.4     48       65         85     35       40       24        5.4      3.9      2.4
   7      1.1       3.2      5.8     13       26         68     17       26       19        5.2      3.2      2.3
   8      1.1       3.1      5.5     e7.0     16         44     13       16       15        6.2      2.8      2.2
   9      1.5       3.6      5.1     e6.0     12         35     11       18       14      336        2.6      2.3
  10      1.4       4.0      4.8     e5.4     10         94     10       15       12       87        2.6      3.6
 
  11      1.2       3.3     55       e5.0      9.4       43      9.9     13       12       20        2.4      2.5
  12      1.4       2.7    246       e4.5      8.8       22    123       11       12        9.9      2.7      3.0
  13      1.2       2.3    222       e4.3      9.0       16    154       10       13        7.4      3.7      3.0
  14      1.2       2.2     54       e4.0      7.5      261     44        9.4     11        6.2      4.3      2.4
  15      1.1       1.9     21       e4.5      7.2      121     24        9.3     10        5.9      3.4      2.1
 
  16      1.3       2.0     15       e5.0      6.8       32     26        8.9      9.3      5.1      7.6      2.0
  17      1.4       2.2    501       e5.6      6.3       21    200        8.4      8.4      4.7     95        2.0
  18      3.6       2.2    272       e5.0     24         18    105        8.9      9.3      4.4     67        1.9
  19      2.2       2.2     46       e4.2    119         15     38      120        8.7      4.1     22        2.2
  20      1.9       2.1    e15       e3.8     71         14     21       83        8.3      3.8      8.8     16  
 
  21      1.9       2.1     e9.0     e4.1    125         13     16       22        9.5      3.6      5.7     43  
  22      1.5       1.9     e8.0   e100      123         12     14       13       13        4.2      4.4      9.7
  23      2.3       1.8     e9.0   e140       41         11     12       10       11        4.3      3.4      4.9
  24      2.2       2.0    268      e30       20         10     11        9.2      7.6      3.9      4.3      3.3
  25      2.0       4.4     82      e35       14         11     10      914       10        3.8      6.1      2.6
 
  26      1.9     e20      e25      e56       14         65      9.5    563       32        3.6      5.7      2.2
  27      1.9     e11      e11      e13     1440         35      9.4     72       19        3.4      4.4      2.0
  28      2.0      e6.0    e10     e120      370         18     10       30        9.5      3.3      3.5      2.1
  29      2.0       3.7     22      e80        ---      240      9.9     22       24        3.1      2.9      1.7
  30      3.3       3.8     19      e20        ---      100      9.5     31      124        2.9      2.8      1.5
  31      2.5       ---     13       e9.0      ---       88      ---    508        ---      2.9      2.9      ---
 
 TOTAL   51.17    106.0   2085.0    828.4   3344.6     2110   1057.2   2715.3   2722.6    618.9    303.6    135.7
 MEAN     1.65     3.53     67.3     26.7      119     68.1     35.2     87.6     90.8     20.0     9.79     4.52
 MAX       3.6       20      501      140     1440      372      200      914     1410      336       95       43
 MIN       .93      1.8      4.8      3.8      6.3       10      9.4      8.4      7.6      2.9      2.4      1.5
 CFSM      .05      .10     1.94      .77     3.45     1.97     1.02     2.53     2.62      .58      .28      .13
 IN.       .06      .11     2.24      .89     3.60     2.27     1.14     2.92     2.93      .67      .33      .15
 
 STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1984 - 1997, BY WATER YEAR (WY)                                 
 
 MEAN     10.8     34.2     40.1     37.0     61.8     51.5     54.7     31.2     20.4     14.6     6.19     12.1
 MAX      50.3      145      172     98.5      122      138     92.7     87.6     90.8     82.0     28.1     99.5
 (WY)     1991     1993     1991     1993     1990     1984     1994     1997     1997     1992     1990     1992
 MIN      1.28     2.09     2.09     10.2     13.0     13.6     17.9     2.29     1.12      .55     1.37      .83
 (WY)     1989     1995     1992     1992     1993     1989     1988     1988     1988     1988     1991     1995
 
 SUMMARY STATISTICS           FOR 1996 CALENDAR YEAR        FOR 1997 WATER YEAR           WATER YEARS 1984 - 1997
 
 ANNUAL TOTAL                       14370.44                   16078.47                                          
 ANNUAL MEAN                           39.3                       44.1                       31.0                
 HIGHEST ANNUAL MEAN                                                                         48.2            1984
 LOWEST ANNUAL MEAN                                                                          11.6            1988
 HIGHEST DAILY MEAN                   961     Jan 18            1440     Feb 27            1440       Dec 30 1990
 LOWEST DAILY MEAN                       .74  Aug 27                .93  Oct  3                .32    Jul 29 1988
 ANNUAL SEVEN-DAY MINIMUM               1.0   Oct  1               1.0   Oct  1                .38    Jul 12 1988
 INSTANTANEOUS PEAK FLOW                                        2230     Feb 27            2230       Feb 27 1997
 INSTANTANEOUS PEAK STAGE                                          8.51  Feb 27               8.51    Feb 27 1997
 INSTANTANEOUS LOW FLOW                                             .93  Oct  3                .32    Jul 29 1988
 ANNUAL RUNOFF (CFSM)                   1.13                       1.27                        .90               
 ANNUAL RUNOFF (INCHES)                15.45                      17.29                      12.17               
 10 PERCENT EXCEEDS                    71                         90                         61                  
 50 PERCENT EXCEEDS                     5.9                        9.3                        6.5                
 90 PERCENT EXCEEDS                     1.4                        2.0                        1.4                
 
e Estimated.


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