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

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                                     04200500 BLACK RIVER AT ELYRIA, OHIO


LOCATION.--Lat 41022'49", long 82006'17", in T.6 N., R.17 W., Lorain County, Hydrologic Unit 04110001, on left bank 
in Cascade Park at Elyria, 0.8 mi downstream from confluence of East and West Branches.
DRAINAGE AREA.--396 mi2.
PERIOD OF RECORD.--October 1944 to current year. Records for May 1903 to July 1906 (published as "near Elyria") 
published in WSP 97, 129, and 205, are unreliable and should not be used.
REVISED RECORDS.--WSP 1912: Drainage area. See also PERIOD OF RECORD.
GAGE.--Water-stage recorder. Datum of gage is 620.83 ft above sea level.
REMARKS.--Records fair except for periods of estimated record and for discharges greater than 1,000 ft3/s, which are 
poor. Some regulation at low flow for industrial use. 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       450      574     2310      312      243     1130      609      212     6270      128      9.6       21
   2       253      314     3050      292      215     2220      353      201     9590      113      9.0       21
   3       161      219     1190      324      251     1800      238      296     4290       55      8.5       24
   4       115      170      597      313      745      738      188     1090     1400       37     15         17
   5        87      145      460      410     2650      520      173      756      755       28     17         14
 
   6        69      129      390      679     1800     1310      175      701      414       24     14         13
   7        58      129      358      418      648     1380      170      495      264       22     12         12
   8        50      176      310      229     e300      808      139      322      190       20     11         12
   9        62      935      262     e150     e240      572      108      286      147       53     10         10
  10        89     2330      232     e120     e200      787       91      447      119       37      9.4       31
 
  11       109     1300     1040     e110     e170      930       83      477       96       29     16         31
  12       105      723     5340     e130     e150      495      603      317       83       23     12         32
  13        91      435     4650     e160     e130      338     2280      220      197       22     33         24
  14        68      309     1150     e120     e120     1560      960      169      262       19     23         19
  15        55      243      609     e100     e115     2110      480      137      163       18     55         17
 
  16        46      201      463      e94     e110      760      315      123      104       16    149         15
  17        40      190     2850      e86     e140      404      339      117       76       14    787         12
  18       262      247     4280      e80     e200      323      414      121       66       14    597         13
  19      2390      310     1350      e72     1370      309      352      975       62       13    254         36
  20      2290      276     e350      e64     1440      281      247      517       66       11    116       1430
 
  21      1520      222     e270      e60     1030      246      189      322       67       11     84        594
  22      1290      184     e230      e58      942      239      168      201      151       12    229        252
  23       809      157     e260      e66      601      219      153      138       63       11    162        132
  24       693      142     1970     e100      353      181      164      110       48       11    110         80
  25       529      248     2310     e600      253      265      221     1060       39       11    173         54
 
  26       355     3300      653     e500      227     1010      183     4010       66       20    173         41
  27       246     3790      439     e380     5610      602      148     2190      148       16    122         32
  28       198     1260      350     e600     4810      370      267      523       64       20     68         26
  29       180      557      628     1000      ---      438      366      324       42       17     46         21
  30       592      668      636      557      ---      791      263      267       33       12     33         17
  31      1090      ---      419      321      ---      797      ---      735      ---       11     25        ---
 
 TOTAL   14352    19883    39406     8505    25063    23933    10439    17859    25335      848   3382.5     3053
 MEAN      463      663     1271      274      895      772      348      576      845     27.4      109      102
 MAX      2390     3790     5340     1000     5610     2220     2280     4010     9590      128      787     1430
 MIN        40      129      230       58      110      181       83      110       33       11      8.5       10
 CFSM     1.17     1.67     3.21      .69     2.26     1.95      .88     1.45     2.13      .07      .28      .26
 IN.      1.35     1.87     3.70      .80     2.35     2.25      .98     1.68     2.38      .08      .32      .29
 
 STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1945 - 1997, BY WATER YEAR (WY)                                 
 
 MEAN     64.2      233      403      482      606      797      624      363      215      140     69.8     79.9
 MAX       463     1238     1885     1825     1505     1866     1728     1122     1245     1472      529      701
 (WY)     1997     1986     1991     1952     1959     1978     1957     1969     1947     1969     1958     1972
 MIN      2.34     5.78     5.82     8.48     16.6      135     22.0     50.0     10.6     7.42     4.72     2.84
 (WY)     1945     1945     1945     1945     1964     1953     1946     1963     1988     1991     1952     1946
 
 SUMMARY STATISTICS           FOR 1996 CALENDAR YEAR        FOR 1997 WATER YEAR           WATER YEARS 1945 - 1997
 
 ANNUAL TOTAL                      210358.2                   192058.5                                           
 ANNUAL MEAN                          575                        526                        338                  
 HIGHEST ANNUAL MEAN                                                                        534              1973
 LOWEST ANNUAL MEAN                                                                         130              1953
 HIGHEST DAILY MEAN                  8370     Jan 19            9590     Jun  2           24900       Jan 22 1959
 LOWEST DAILY MEAN                      5.4   Sep  3               8.5   Aug  3                .60    Oct  5 1944
 ANNUAL SEVEN-DAY MINIMUM               5.6   Aug 31              11     Jul 19               1.4     Oct  1 1944
 INSTANTANEOUS PEAK FLOW                                       10400     Jun  2 a         51700       Jul  6 1969
 INSTANTANEOUS PEAK STAGE                                         15.03  Jun  2              26.40    Jul  6 1969
 INSTANTANEOUS LOW FLOW                                            8.5   Aug  3                .00    Oct 10 1956
 ANNUAL RUNOFF (CFSM)                   1.45                       1.33                        .85               
 ANNUAL RUNOFF (INCHES)                19.76                      18.04                      11.61               
 10 PERCENT EXCEEDS                  1510                       1290                        824                  
 50 PERCENT EXCEEDS                   202                        201                         74                  
 90 PERCENT EXCEEDS                    14                         17                         10                  
 
a Peaks above base shown in table of peak discharges and stages at continuous-record surface-water-discharge stations.
e Estimated.


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