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USGS Daily Statistics for Massachusetts

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ICE EFFECTS ON STREAMFLOW

The formation of ice on rivers can cause discharge values to appear unusually high. Display of these erroneous discharge data may result in improper assessment of flow conditions and misuse of the data. For this reason, display of discharge values for streams significantly affected by ice may be disabled from view. Display of discharge data will resume when ice conditions are no longer present. Discharge values for streams minimally affected by ice will continue to be displayed. Flows for streams with these conditions appear to increase during the night and decrease to near-base-line conditions around midday. To estimate the correct discharge for these streams, use the flow rate that corresponds to the bottom of the discharge curve, rather than the peak that corresponds to the top of the curve. Note that this method of estimation is possible only when no surface runoff is occurring. Daily mean discharges for periods of both significant and minimal ice-effect will be estimated and published in the Annual Water-Data Report for the water year in which they occurred.


The statistics generated from this site are based on approved daily-mean data and may not match those published by the USGS in official publications. The user is responsible for assessment and use of statistics from this site. For more details on why the statistics may not match, click here.

USGS 01174500 EAST BRANCH SWIFT RIVER NEAR HARDWICK, MA


Worcester County, Massachusetts
Hydrologic Unit Code 01080204
Latitude  42°23'36", Longitude  72°14'20" NAD27
Drainage area 43.7  square miles
Contributing drainage area 43.7  square miles
Gage datum 504.70 feet above NGVD29
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00060, Discharge, cubic feet per second,
Day of
month
Mean of daily mean values for each day for water year of record in, ft3/s   (Calculation Period 1936-10-01 -> 2019-09-30)

Calculation period restricted by USGS staff due to special conditions at/near site
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
1 78 75 88 201 116 86 48 28 18 30 49 82
2 83 75 88 202 110 82 47 31 17 33 48 82
3 83 88 90 214 109 79 42 27 16 33 57 80
4 81 97 94 207 110 74 39 27 16 35 62 75
5 78 92 96 208 106 69 38 27 16 32 59 77
6 77 83 107 213 96 74 39 24 16 30 56 83
7 80 83 134 203 93 80 34 22 23 32 56 90
8 82 84 118 184 89 76 30 26 24 31 55 91
9 82 75 131 169 89 68 28 29 22 42 60 83
10 81 70 130 165 91 64 28 31 19 40 65 82
11 76 70 119 163 94 62 27 29 18 37 65 81
12 77 76 123 159 95 61 27 35 21 38 64 86
13 84 74 124 163 94 62 29 35 24 38 64 89
14 78 76 133 160 95 71 35 36 22 37 67 86
15 80 76 134 152 92 68 30 34 23 48 66 85
16 76 82 134 162 92 63 28 27 21 49 63 80
17 71 81 138 176 97 58 26 24 23 46 65 79
18 69 81 148 161 98 54 27 25 28 47 64 89
19 73 84 144 144 97 51 30 38 33 44 59 83
20 78 79 143 139 91 47 33 37 34 46 62 76
21 74 81 146 133 86 45 36 27 80 56 69 79
22 76 89 161 127 82 46 32 25 57 48 71 90
23 80 94 160 129 76 51 33 23 35 43 74 79
24 91 95 150 129 80 53 44 20 30 48 70 80
25 116 102 146 127 84 63 38 18 32 59 70 90
26 118 104 148 123 85 51 28 18 37 60 78 86
27 121 98 161 131 79 46 24 17 46 54 83 84
28 121 92 162 128 73 48 26 20 38 52 80 81
29 98 96 165 128 70 49 29 22 34 56 88 78
30 83   181 120 78 48 32 19 33 60 86 77
31 77   195   81   29 19   53   77