U.S. Geological Survey
Water Resources Data - Ohio, Water Year 97, Vol. 1 | Great Miami River Basin


			03270500 GREAT MIAMI RIVER AT DAYTON, OHIO

LOCATION.--Lat 39045'55", long 84011'51", in sec. 10, R.7, T.1, Montgomery County, Hydrologic Unit 05080002, on left 
bank 1,000 ft downstream from Main Street Bridge in Dayton, 0.7 mi upstream from Wolf Creek, 0.8 mi downstream 
from Mad River, and at mile 80.0.
DRAINAGE AREA.--2,511 mi2.
PERIOD OF RECORD.--April to September 1905, January to September 1906, January 1907 to December 1909 (gage heights 
only), April 1913 to current year. Monthly discharge only for October 1919 to September 1921, published in WSP 
1305. Gage-height records collected at Main Street Bridge since January 1892 are contained in reports of National 
Weather Service. Prior to October 1962, published as Miami River at Dayton.
REVISED RECORDS.--WSP 1385: 1917. WSP 1908: Drainage area.
GAGE.--Water-stage recorder. Datum of gage is 700.00 ft above sea level as requested by cooperator (699.71 ft 
adjustment of 1929). Prior to Oct. 1, 1921, nonrecording gage at Main Street Bridge at datum 23.73 ft higher.  
Oct. 1, 1921, to July 24, 1931, nonrecording gage at Main Street Bridge at datum 21.00 ft higher.
REMARKS.--Records good except for periods of estimated record, which are poor. Flood flow regulated by four retarding 
basins upstream from station beginning in 1920 on Mad River 6.5 mi upstream, on Stillwater River 10.5 mi upstream, 
on Great Miami River 11.5 mi upstream, and on Loramie Creek 40 mi upstream. Also see REMARKS for stations 03261500, 
03261950 and 03269500. Water is diverted 6 mi upstream from station for use in Dayton; much of the flow is diverted 
to the Little Miami River Basin through the Dayton sewer systems. Sediment data collected at this site. U.S. Army 
Corps of Engineers satellite telemeter at station.
COOPERATION.--Gage-height charts, tapes, and 7 discharge measurements furnished by Miami Conservancy District.
EXTREMES OUTSIDE PERIOD OF RECORD.--Flood of Mar. 26, 1913, reached a stage of 29.0 ft, site and datum then in use; 
discharge, 250,000 ft3/s, computed by Miami Conservancy District.

	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      1080      549    10400     3150     2280     8320     3750     1340    18900     3030      736      543
   2       897      557    12300     2840     2010    14600     2960     1500    30500     3910      652      567
   3       778      535     6950     2540     1930    14900     2470     5350    27200     3540      643      574
   4       699      529     4360     2350     5780     9760     2250     7840    22300     3700      671      483
   5       680      521     3290     3490    17800     6350     2250     5180    16300     2400      674      467
 
   6       669      506     2850     5550    14700    12900     2310     3500    12800     1820      625      467
   7       645      586     2370     3690     8710    11100     2170     2720     9600     1550      585      439
   8       627      743     2140     2610     5450     6750     1950     2410     5110     1410      520      425
   9       578      706     1920     2290     4120     5530     1790     2300     3530     1740      501      432
  10       560      876     1740     2200     3330     8280     1740     2120     2950     1580      467      683
 
  11       558      761     1610     1620     2730     7270     1640     1980     2760     1460      462      830
  12       545      684     5450     1350     2400     5080     1870     1770     2510     1260      471      596
  13       547      657    12000    e1200     2140     3970     2420     1620     2220     1120      762      479
  14       530      640     8650    e1150     2050     6950     2500     1540     3320     1060      570      463
  15       499      625     5600    e1100     2020    10400     2020     1490     2480     1040      566      492
 
  16       472      590     4670    e1500     1820     6160     1810     1370     2330      943      532      472
  17       493      589    15700    e1200     1660     4380     1720     1350     2810      882     1250      440
  18       768      641    21200    e1100     1640     4100     1690     1230     2250      837     2000      454
  19       725      616    15500    e1000     1830     5660     1660     1300     4100      769     1330      454
  20       656      626     8560     e940     2240     4980     1530     1370     3670      726     1450      447
 
  21       655      653     5110    e1200     2880     3950     1460     1430     2440      761     1290      460
  22       630      659     4210     3050     5970     3370     1410     1300     1940      836     1060      463
  23       687      628     3260     9760     4660     2850     1370     1220     1820     1090      918      457
  24       642      620    13500     8410     3150     2470     1380     1140     1690     1200      839      465
  25       559      885    16600     5040     2490     2310     1360     1110     1520     1060      777      450
 
  26       545     8320    11100     3330     2300     2270     1290     1410     1510      906      702      425
  27       554     7970     6030     3100     6920     2100     1250     2250     1480      873      668      406
  28       523     4040     4670     7190    11800     1990     1300     1690     1460     1210      638      404
  29       539     2630     5290     5320      ---     4710     1270     1460     1330      967      599      401
  30       527     2870     4700     3520      ---     6380     1270     1360     1270      844      565      386
  31       543      ---     3760     2660      ---     4570      ---     2530      ---      789      568      ---
 
 TOTAL   19410    41812   225490    95450   126810   194410    55860    66180   194100    45313    24091    14524
 MEAN      626     1394     7274     3079     4529     6271     1862     2135     6470     1462      777      484
 MAX      1080     8320    21200     9760    17800    14900     3750     7840    30500     3910     2000      830
 MIN       472      506     1610      940     1640     1990     1250     1110     1270      726      462      386
 
 STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1930 - 1997, BY WATER YEAR (WY)                                 
 
 MEAN      707     1357     2190     3299     3447     4156     3910     2717     2195     1488      941      606
 MAX      5792     8047     9210    17060     9842    11060     9727    11030    12150     7510     5727     2862
 (WY)     1987     1973     1991     1937     1950     1963     1964     1996     1958     1993     1979     1979
 MIN       148      195      239      263      314      557      852      373      259      216      196      165
 (WY)     1964     1964     1964     1945     1964     1941     1971     1941     1988     1954     1988     1963
 
 SUMMARY STATISTICS           FOR 1996 CALENDAR YEAR        FOR 1997 WATER YEAR           WATER YEARS 1930 - 1997
 
 ANNUAL TOTAL                     1520328                    1103450                                             
 ANNUAL MEAN                         4154                       3023                       2245                  
 HIGHEST ANNUAL MEAN                                                                       4156              1973
 LOWEST ANNUAL MEAN                                                                         634              1954
 HIGHEST DAILY MEAN                 29800     Apr 30           30500     Jun  2           57100       Jan 22 1959
 LOWEST DAILY MEAN                    426     Sep  3             386     Sep 30             109       Aug  8 1934
 ANNUAL SEVEN-DAY MINIMUM             451     Sep  2             420     Sep 24             118       Sep 25 1941
 INSTANTANEOUS PEAK FLOW                                       32000     Jun  2           60900       Jan 22 1959
 INSTANTANEOUS PEAK STAGE                                         31.79  Jun  2              36.00    Jan 22 1959
 INSTANTANEOUS LOW FLOW                                          386     Sep 30             109       Aug  8 1934
 10 PERCENT EXCEEDS                 11900                       7220                       5140                  
 50 PERCENT EXCEEDS                  1940                       1550                       1020                  
 90 PERCENT EXCEEDS                   553                        528                        313                  

e Estimated.


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