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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 01171500 MILL RIVER AT NORTHAMPTON, MA


Hampshire County, Massachusetts
Hydrologic Unit Code 01080201
Latitude  42°19'08", Longitude  72°39'56" NAD27
Drainage area 52.6  square miles
Contributing drainage area 52.6  square miles
Gage datum 169.34 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 1938-10-01 -> 2022-09-30)

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
1 102 84 113 289 162 129 60 37 28 58 70 117
2 102 95 119 297 149 116 52 42 37 51 76 114
3 95 116 114 300 148 108 47 33 28 46 110 102
4 89 112 135 298 154 103 51 35 28 54 79 95
5 90 108 121 325 141 90 49 37 26 48 90 104
6 94 94 133 295 139 135 45 30 30 51 79 110
7 86 95 158 272 127 119 41 35 47 47 80 108
8 91 93 147 241 119 93 41 50 40 50 89 104
9 101 79 175 222 127 82 40 43 34 69 120 105
10 89 79 141 236 136 85 43 49 31 47 88 108
11 93 102 165 226 142 80 40 43 42 45 89 118
12 94 94 163 224 145 81 40 51 48 52 103 134
13 82 90 176 228 138 83 41 50 36 48 96 124
14 94 92 182 224 131 100 50 42 31 54 86 121
15 88 95 185 207 114 88 37 39 38 105 86 115
16 85 105 178 274 118 87 51 33 39 78 82 98
17 78 93 195 237 141 78 38 28 51 82 92 106
18 91 104 192 204 135 68 50 42 54 58 81 109
19 95 100 194 195 137 68 46 79 47 61 71 94
20 92 118 224 199 127 59 41 38 40 90 98 83
21 87 111 206 182 120 57 42 33 34 77 89 133
22 89 119 263 175 113 53 40 35 36 60 93 104
23 91 116 221 190 103 58 52 38 41 63 95 92
24 107 124 207 190 123 61 46 33 41 76 79 113
25 121 146 220 183 132 54 35 28 51 71 101 131
26 126 143 228 178 124 56 37 24 49 67 105 111
27 137 126 246 180 108 48 39 25 61 65 109 112
28 118 117 232 174 101 66 44 60 62 83 100 104
29 102 117 253 172 114 58 51 34 69 83 102 94
30 89   272 158 123 74 45 30 70 82 108 106
31 90   298   112   40 28   81   117