MERRIMACK RIVER BASIN

                                   01081000 WINNIPESAUKEE RIVER AT TILTON, NH

LOCATION.--Lat 43°26'31", long 71°35'20", Belknap County, Hydrologic Unit 01070002, on right bank, at Tilton and 0.3 mi 
    upstream from Packer Brook.
DRAINAGE AREA.--471 mi².
PERIOD OF RECORD.--Discharge records:  January 1937 to current year.
    Water-quality records:  Water year 1953.
REVISED RECORDS.--WSP 1901:  1960.
GAGE.--Water-stage recorder.  Datum of gage is 441.87 ft above sea level.
REMARKS.--Records good except for estimated daily discharges which are fair. Flow regulated by powerplants prior to 
    1967 and by Winnipesaukee (station 01080000), Winnisquam 4.5 mi upstream, Wentworth, Merrymeeting (Reservoirs in 
    Merrimack River basin), and other lakes upstream. 
EXTREMES FOR CURRENT YEAR.--Maximum discharge, 2,510 ft³/s, April 19, gage height 6.45 ft; minimum daily discharge, 
    49 ft³/s, October 18.

                       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       223      893      901     1790     1060     1630     1330     1820      306      236      483      244
   2       220      939     1330     1730     1130     1510     1210     1810      313      236      466      262
   3       219      945     1510     1620     1130     1400     1130     1790      352      252      465      316
   4       215      929     1280     1600     1130     1350     1150     1780      498      261      464      317
   5       216      922     1220     1610     1160     1250     1210     1670      508      253      464      316
 
   6       216      910     1280     1620     1230     1180     1260     1240      505      243      463      316
   7       216      928     1260     1610     1180     1160     1300     1280      501      239      460      317
   8       221      968     1250     1610     1070     1140     1330     1350      500      239      460      325
   9       238     1050     1250     1590     1060     1130     1220     1250      515      249      460      328
  10       257     1100     1250     1550     1060     1170     1120     1070      503      279      459      319
 
  11       250     1050     1320     1540     1060     1260     1080     1050      493      267      466      311
  12       240     1010     1330     1500     1060     1260     1070     1030      490      254      397      320
  13       233     1010     1350     1380     1060     1240     1110     1020      451      246      251      324
  14       225      999     1360     1180     1070     1200     1130     1010      351      252      232      322
  15       119      990     1350     1180     1100     1080     1110      932      336      434      223      315
 
  16       e84      981     1350     1340     1100     1070     1080      906      329      604      221      324
  17       e54      974     1390     1550     1100     1060     1080      891      298      641      220      325
  18       e49      974     1550     1530     1100     1060     1280      839      250      740      218      299
  19       e58      929     1750     1450     1100     1060     2150      814      284      754      216      233
  20       287      840     1790     1340     1130     1060     2250      823      280      842      210      226
 
  21      1120      834     1720     1420     1130     1060     1940      767      266      841      233      222
  22      1530     1090     1650     1420     1190     1070     1790      584      257      836      253      220
  23      1220      983     1620     1420     1260     1070     1800      552      255      869      248      220
  24      1070      952     1540     1380     1250     1060     1790      548      250      937      244      220
  25       854      951     1530     1390     1190     1060     1780      545      250      938      241      219
 
  26       555      945     1600     1380     1160     1110     1760      543      250      936      240      219
  27       517      903     1740     1360     1220     1170     1770      539      247      934      247      219
  28       640      866     1720     1350     1450     1190     1840      466      244      931      252      219
  29       894      850     1730     1340      ---     1230     1920      289      239      925      256      225
  30       913      842     1850     1260      ---     1300     1880      261      237      845      249      220
  31       901      ---     1880     1050      ---     1420      ---      260      ---      644      244      ---
 
 TOTAL   14054    28557    45651    45090    31940    37010    43870    29729    10558    17157    10005     8262
 MEAN      453      952     1473     1455     1141     1194     1462      959      352      553      323      275
 MAX      1530     1100     1880     1790     1450     1630     2250     1820      515      938      483      328
 MIN        49      834      901     1050     1060     1060     1070      260      237      236      210      219
 
 STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1937 - 1997, BY WATER YEAR (WY)
 
 MEAN      427      523      733      849      933      960     1151      986      700      450      409      407
 MAX      1257     1304     2209     1855     1889     2043     2745     2605     2821     1767      897      954
 (WY)     1978     1976     1984     1952     1958     1983     1953     1954     1984     1973     1986     1938
 MIN       219      235      136      145      158      418      420      217      201      179      181      182
 (WY)     1958     1972     1942     1942     1942     1989     1948     1957     1957     1957     1957     1957
 
 SUMMARY STATISTICS           FOR 1996 CALENDAR YEAR        FOR 1997 WATER YEAR           WATER YEARS 1937 - 1997
 
 ANNUAL TOTAL                      397348                     321883                                             
 ANNUAL MEAN                         1086                        882                        706                  
 HIGHEST ANNUAL MEAN                                                                       1229              1984
 LOWEST ANNUAL MEAN                                                                         304              1965
 HIGHEST DAILY MEAN                  3560     May 12            2250     Apr 20            4480       May 31 1984
 LOWEST DAILY MEAN                   e 49     Oct 18            e 49     Oct 18              48       Aug 31 1941
 ANNUAL SEVEN-DAY MINIMUM             117     Oct 13             117     Oct 13              73       Oct 11 1995
 INSTANTANEOUS PEAK FLOW                                        2510     Apr 19            4580       May 31 1984
 INSTANTANEOUS PEAK STAGE                                          6.45  Apr 19               8.68    May 31 1984
 10 PERCENT EXCEEDS                  2110                       1600                       1430                  
 50 PERCENT EXCEEDS                   993                        951                        535                  
 90 PERCENT EXCEEDS                   222                        236                        267                  
 
   e  Estimated.

The URL for this page is: http://nh.water.usgs.gov/Publications/annual97/01081000.htm

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