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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 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
Gage datum 243.50 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 1949-10-01 -> 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
1 110 110 144 364 193 121 59 42 34 37 83 119
2 116 109 145 384 184 127 61 37 32 37 82 120
3 114 121 155 376 180 121 66 32 32 36 92 123
4 115 150 154 361 174 110 52 31 28 37 108 118
5 118 147 162 371 167 102 48 30 27 43 92 113
6 112 134 165 396 154 108 51 30 24 43 88 120
7 104 124 191 342 157 127 44 27 36 46 85 126
8 103 126 188 294 148 121 41 30 38 45 90 123
9 121 113 189 258 148 103 42 32 33 46 96 119
10 142 103 199 252 150 92 43 36 31 47 97 124
11 124 112 192 273 153 91 39 36 29 41 104 131
12 123 119 206 256 163 82 39 37 50 44 103 137
13 120 113 208 250 159 81 47 37 42 45 104 145
14 116 119 236 261 164 94 50 37 32 45 108 137
15 117 115 260 245 164 101 40 34 28 64 106 151
16 109 127 248 265 155 85 34 30 26 98 98 137
17 107 128 218 314 163 83 33 28 32 66 102 128
18 100 120 222 265 146 80 35 31 39 64 102 139
19 105 130 244 231 138 71 36 35 51 57 90 140
20 111 122 250 213 137 66 38 45 36 58 86 125
21 113 123 242 204 138 65 37 33 33 98 100 115
22 112 142 252 205 133 62 35 30 33 82 104 141
23 117 149 267 211 116 65 34 30 32 63 107 122
24 125 142 255 210 110 69 39 30 36 67 102 118
25 151 166 243 212 123 63 44 27 37 71 99 143
26 155 200 254 198 132 61 33 24 46 76 112 148
27 175 176 276 201 130 59 31 22 50 70 128 136
28 187 160 279 204 112 60 36 24 46 69 119 135
29 149 180 283 212 102 63 41 30 40 77 117 126
30 127   324 206 116 62 46 29 42 88 120 117
31 114   356   118   42 29   92   113