MERRIMACK RIVER BASIN
01085800 WEST BRANCH WARNER RIVER NEAR BRADFORD, NH
LOCATION.--Lat 43°15'33", long 72°01'35", Merrimack County, Hydrologic Unit 01070003, on left bank, 75 ft downstream
from small right-bank tributary, 200 ft upstream from highway bridge, and 3.5 mi west of Bradford.
DRAINAGE AREA.--5.75 mi².
PERIOD OF RECORD.--Discharge records: May 1962 to current year.
Water-quality records: Water year 1976.
REVISED RECORDS.--WDR NH-VT-1: 1984.
GAGE.--Water-stage recorder and crest stage gage. Elevation of gage is 950 ft above sea level, from topographic map.
REMARKS.--Records good except those for estimated daily discharges, which are fair.
EXTREMES FOR CURRENT YEAR.--Peak discharges greater than base discharge of 110 ft³/s and maximum (*):
Discharge Gage height Discharge Gage height
Date Time (ft³/s) (ft) Date Time (ft³/s) (ft)
Oct. 21 0915 * 534 * 8.53 Feb. 22 1630 163 6.38
Nov. 9 1045 446 8.13 Mar. 30 1700 127 6.05
Dec. 2 0900 400 7.91 Apr. 7 1600 192 6.63
Dec. 25 0030 249 7.06 Apr. 19 0100 229 6.92
Minimum discharge, 0.66 ft³/s, August 11, September 19, 21, 24.
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 1.5 9.7 29 e17 5.4 20 33 22 9.9 1.6 .89 e2.2
2 1.3 8.6 176 15 5.1 31 23 23 8.4 1.9 .83 e2.0
3 1.2 7.7 49 e13 5.0 30 22 25 6.4 6.4 .84 e1.9
4 1.1 7.1 27 12 4.9 19 43 32 5.3 7.3 .83 e1.8
5 1.2 6.8 19 14 5.8 16 56 19 4.7 3.4 1.3 e1.7
6 1.2 6.4 17 20 5.7 21 77 22 4.4 2.3 1.7 e1.6
7 1.3 7.1 15 14 5.3 15 123 25 4.1 1.9 1.3 e1.5
8 1.4 18 16 11 5.1 e14 64 17 3.7 1.8 1.0 e1.5
9 8.2 216 13 9.5 4.8 e12 31 17 3.3 2.8 .91 e1.4
10 6.3 60 12 9.6 4.7 11 23 19 3.0 5.1 .80 e1.4
11 4.9 29 11 8.4 4.7 10 20 16 2.6 3.0 .84 1.3
12 2.7 19 14 7.5 4.6 e9.6 21 13 2.4 2.4 1.1 7.9
13 2.2 15 18 6.8 4.6 e9.5 47 12 2.3 2.2 2.7 3.5
14 2.0 12 15 6.4 4.4 13 42 12 2.2 2.2 3.0 2.1
15 1.9 9.8 16 6.1 4.5 9.3 33 18 2.0 2.7 1.8 1.6
16 1.8 8.5 16 12 4.3 7.3 37 24 1.8 5.1 1.6 1.2
17 1.7 8.4 40 e12 4.2 6.8 42 16 1.8 3.5 1.3 .99
18 1.7 8.4 57 7.6 4.6 6.6 116 14 3.5 e3.3 1.1 .99
19 1.7 8.3 55 5.7 12 e6.4 169 19 9.5 e2.8 1.0 .88
20 136 7.8 37 5.5 16 6.4 69 41 3.8 2.4 .88 .87
21 351 7.0 21 5.1 17 6.3 50 20 2.7 1.8 4.3 .78
22 98 6.3 17 5.1 102 6.6 39 17 2.2 1.7 8.7 .77
23 37 5.8 14 9.3 61 e6.0 32 14 1.8 1.4 4.5 .74
24 29 5.3 50 e6.2 23 e5.7 26 12 1.6 1.2 2.9 .72
25 20 5.1 98 e7.8 e16 e5.7 21 11 1.6 1.1 2.2 .76
26 15 21 32 10 14 42 19 9.7 1.5 1.1 2.0 e.80
27 12 16 22 e7.0 25 27 17 8.5 1.3 1.2 e1.9 e.70
28 12 10 18 7.0 32 31 56 7.7 1.2 1.2 e1.8 e.70
29 10 8.4 38 6.0 --- 37 41 6.7 1.1 1.1 e2.2 e1.0
30 11 7.5 52 5.6 --- 83 24 5.9 1.2 .98 e3.3 e.90
31 12 --- e22 5.5 --- 57 --- 5.7 --- .94 e2.4 ---
TOTAL 788.3 566.0 1036 287.7 405.7 581.2 1416 524.2 101.3 77.82 61.92 46.20
MEAN 25.4 18.9 33.4 9.28 14.5 18.7 47.2 16.9 3.38 2.51 2.00 1.54
MAX 351 216 176 20 102 83 169 41 9.9 7.3 8.7 7.9
MIN 1.1 5.1 11 5.1 4.2 5.7 17 5.7 1.1 .94 .80 .70
CFSM 4.42 3.28 5.81 1.61 2.52 3.26 8.21 2.94 .59 .44 .35 .27
IN. 5.10 3.66 6.70 1.86 2.62 3.76 9.16 3.39 .66 .50 .40 .30
STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1962 - 1997, BY WATER YEAR (WY)
MEAN 8.03 12.4 12.2 8.62 9.69 21.2 37.1 18.3 6.88 3.09 2.76 2.23
MAX 30.9 29.7 33.4 33.3 45.9 46.9 93.7 41.1 22.9 13.6 26.1 10.5
(WY) 1976 1996 1997 1978 1981 1977 1969 1984 1982 1996 1990 1987
MIN .49 1.59 3.04 1.87 .95 7.34 10.5 5.01 1.04 .26 .17 .17
(WY) 1964 1979 1979 1977 1980 1965 1995 1965 1965 1965 1965 1964
SUMMARY STATISTICS FOR 1996 CALENDAR YEAR FOR 1997 WATER YEAR WATER YEARS 1962 - 1997
ANNUAL TOTAL 7433.30 5892.34
ANNUAL MEAN 20.3 16.1 11.9
HIGHEST ANNUAL MEAN 18.6 1996
LOWEST ANNUAL MEAN 4.60 1965
HIGHEST DAILY MEAN 351 Oct 21 351 Oct 21 351 Oct 21 1996
LOWEST DAILY MEAN .37 Sep 7 ae .70 Sep 27 .07 Aug 7 1965
ANNUAL SEVEN-DAY MINIMUM .45 Sep 1 .74 Sep 22 .09 Sep 16 1964
INSTANTANEOUS PEAK FLOW 534 Oct 21 b 800 c May 29 1984
INSTANTANEOUS PEAK STAGE 8.53 Oct 21
INSTANTANEOUS LOW FLOW d .66 Aug 11 f .06 f Sep 20 1964
ANNUAL RUNOFF (CFSM) 3.53 2.81 2.07
ANNUAL RUNOFF (INCHES) 48.09 38.12 28.07
10 PERCENT EXCEEDS 49 37 28
50 PERCENT EXCEEDS 8.4 7.0 4.9
90 PERCENT EXCEEDS 1.1 1.2 .64
a Also occurred on September 28.
b From rating curve extended above 300 ft³/s.
c Could also be on May 30, 1984.
d Also occurred on September 19, 21, 24.
e Estimated.
f About.
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