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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 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 -> 2021-09-30)

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 27 59 69 118
2 102 96 120 299 149 116 52 42 24 52 75 114
3 95 117 114 302 148 108 47 33 25 46 110 102
4 89 108 136 300 154 103 51 35 27 49 78 95
5 90 107 121 328 141 90 49 37 25 42 89 104
6 94 94 134 297 139 135 45 30 29 49 79 110
7 87 95 157 274 127 119 41 35 46 46 79 108
8 91 93 146 237 119 93 41 50 39 49 89 104
9 101 79 175 221 127 82 40 43 33 69 120 106
10 90 79 141 236 136 85 43 49 30 47 88 109
11 93 102 165 227 142 80 40 43 41 45 89 118
12 94 94 163 225 145 81 40 51 48 51 99 133
13 82 89 176 230 138 83 41 50 35 47 93 125
14 94 92 183 225 131 100 50 42 31 53 84 121
15 88 95 186 208 114 88 37 39 37 105 85 115
16 85 105 178 276 118 87 51 33 38 78 81 98
17 79 93 196 238 141 78 38 28 51 82 92 106
18 92 101 192 205 135 68 50 42 54 58 80 109
19 96 100 194 193 137 68 46 78 47 61 71 92
20 92 118 223 199 127 59 41 37 40 90 98 82
21 88 111 207 182 120 57 42 33 34 77 89 133
22 89 119 265 175 113 53 40 34 36 60 92 103
23 92 112 222 190 103 58 52 29 41 63 94 92
24 108 124 207 190 123 61 46 25 39 76 79 113
25 122 146 219 183 132 54 35 26 50 70 101 131
26 127 143 228 178 124 56 37 23 48 65 105 111
27 138 126 247 180 108 48 39 25 61 63 109 112
28 119 117 233 174 101 66 44 60 62 82 100 103
29 103 117 255 172 114 58 51 33 69 83 102 94
30 89   274 158 123 74 45 29 70 81 108 106
31 91   300   112   40 27   78   117