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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 01096000 SQUANNACOOK RIVER NEAR WEST GROTON, MA


Middlesex County, Massachusetts
Hydrologic Unit Code 01070004
Latitude  42°38'03", Longitude  71°39'30" NAD27
Drainage area 65.9  square miles
Contributing drainage area 63.7  square miles
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00060, Discharge, cubic feet per second,
Day of
month
Mean of daily mean values for each day for 68 - 69 years of record in, ft3/s   (Calculation Period 1949-10-01 -> 2018-09-30)

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
1 105 111 143 373 185 121 60 42 34 36 75 116
2 110 109 144 396 176 130 62 37 25 36 78 117
3 109 122 150 388 176 124 67 32 24 33 84 117
4 112 150 152 369 171 112 51 31 25 34 97 114
5 115 143 162 379 163 105 47 30 25 38 87 111
6 109 130 166 408 148 110 51 29 23 38 84 118
7 101 120 195 352 154 129 44 27 35 44 79 124
8 101 122 191 302 147 124 41 30 38 44 86 122
9 120 108 193 264 147 106 41 32 33 45 94 119
10 143 99 204 257 150 95 40 36 29 46 94 124
11 124 110 196 280 154 93 38 36 27 40 99 126
12 122 113 210 263 164 83 36 34 49 40 102 134
13 116 108 211 256 161 83 40 34 40 43 97 143
14 114 117 240 263 166 96 46 34 30 43 97 133
15 116 114 266 247 166 103 38 30 27 65 101 140
16 107 127 251 265 156 87 33 28 25 100 94 131
17 100 127 220 309 166 85 32 27 31 65 99 125
18 94 119 226 261 148 82 32 30 33 63 100 137
19 102 130 250 230 140 73 32 33 32 56 88 139
20 109 122 256 213 139 68 35 43 29 58 83 125
21 112 121 247 204 140 67 36 31 30 101 98 114
22 112 141 258 205 136 63 33 28 31 84 103 136
23 117 150 274 209 118 67 32 26 30 64 107 117
24 124 143 261 209 112 71 35 24 35 67 102 116
25 140 166 247 214 126 64 43 23 36 72 97 140
26 150 201 259 198 136 62 32 22 41 77 111 136
27 173 175 283 194 134 60 30 20 43 68 122 129
28 189 155 285 196 115 61 35 23 40 63 111 132
29 149 171 289 209 104 64 40 30 37 73 113 123
30 127   328 198 118 63 44 29 40 86 119 114
31 114   362   119   40 28   85   109