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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 01105554 NEPONSET RIVER AT GREENLODGE ST NEAR CANTON, MA


Norfolk County, Massachusetts
Hydrologic Unit Code 01090001
Latitude  42°12'33", Longitude  71°08'47" NAD27
Drainage area 83.7  square miles
Gage datum 39.21 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 2003-10-01 -> 2025-09-30)

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
1 244 213 261 356 223 150 111 62 57 109 195 210
2 238 214 266 361 224 148 114 57 60 109 185 219
3 228 210 284 359 220 142 116 53 62 102 174 220
4 226 209 285 367 209 142 113 49 60 102 163 215
5 219 212 279 370 202 144 114 52 55 104 155 203
6 214 213 273 360 204 148 115 56 60 103 145 199
7 210 212 273 352 197 148 115 53 74 101 142 198
8 206 214 280 345 190 163 104 64 74 92 140 203
9 202 211 285 333 182 170 102 76 72 88 142 204
10 204 205 286 319 185 170 109 84 69 82 138 217
11 216 202 287 301 175 166 107 77 70 72 136 231
12 231 201 287 288 160 169 101 65 73 75 134 254
13 253 203 288 287 152 162 101 58 73 74 138 274
14 264 220 302 282 157 159 98 54 73 83 145 273
15 266 230 341 270 165 161 90 65 71 104 153 267
16 263 233 365 272 182 150 82 83 68 130 166 258
17 258 240 368 286 194 148 87 71 60 144 179 258
18 255 241 360 286 191 144 95 63 62 138 186 257
19 257 241 344 279 191 139 89 61 81 130 178 257
20 251 239 328 268 184 128 77 57 83 127 169 245
21 238 230 311 259 176 126 70 56 75 120 160 232
22 222 221 293 252 165 125 73 63 69 116 160 225
23 208 219 285 259 165 125 81 66 65 119 171 224
24 215 225 297 269 165 116 102 68 61 121 185 242
25 226 240 300 258 170 112 109 67 58 129 196 244
26 241 255 292 247 170 113 102 67 61 141 201 246
27 247 259 284 241 167 111 90 63 71 148 208 251
28 245 264 278 236 163 115 82 65 77 163 214 254
29 238 244 291 230 162 126 78 70 93 179 210 249
30 228   320 224 162 120 71 69 104 200 201 254
31 220   342   158   65 64   203   250