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USGS Surface-Water 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 504.06 feet above NAVD88
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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 -> 2024-09-30)

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 82 76 89 200 119 86 48 30 19 35 54 83
2 86 76 89 201 114 81 47 32 23 35 51 84
3 86 89 92 212 111 78 44 29 20 35 59 82
4 84 98 96 204 112 73 42 28 18 37 63 77
5 81 95 97 205 109 68 40 28 17 37 60 80
6 80 85 107 208 100 72 40 25 17 34 57 85
7 82 85 133 198 95 77 35 23 24 35 56 92
8 83 85 119 181 90 74 31 27 24 34 56 92
9 83 77 131 167 89 67 30 29 22 44 60 84
10 81 72 129 163 91 62 31 31 21 41 65 85
11 77 72 119 161 94 61 30 29 21 38 65 90
12 79 78 123 157 95 60 30 35 30 39 66 94
13 87 77 125 161 94 60 33 34 29 39 69 94
14 82 78 134 161 94 69 37 35 25 38 71 92
15 83 78 135 152 91 66 32 34 25 49 69 93
16 79 83 135 161 92 61 32 28 23 49 65 86
17 75 82 137 175 97 56 31 25 24 48 67 85
18 72 85 148 160 97 53 36 25 29 49 66 97
19 76 88 144 145 95 50 38 38 34 46 61 94
20 81 82 143 140 90 46 37 37 35 47 63 83
21 77 82 146 134 86 44 40 27 78 58 69 81
22 78 90 160 127 82 45 44 25 56 53 72 91
23 82 98 159 130 75 49 40 24 36 47 75 82
24 93 98 151 131 79 52 49 22 32 50 71 84
25 116 103 148 128 83 61 42 20 35 60 72 97
26 120 104 150 123 83 50 31 21 39 61 79 95
27 124 99 162 130 78 46 28 19 47 56 84 89
28 123 94 162 127 72 47 30 22 38 55 82 84
29 99 100 165 128 70 49 32 23 36 58 88 81
30 84   180 122 78 47 35 20 40 61 86 80
31 78   193   81   32 20   58   80