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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 01179500 WESTFIELD RIVER AT KNIGHTVILLE, MA


Hampshire County, Massachusetts
Hydrologic Unit Code 01080206
Latitude  42°17'16", Longitude  72°51'53" NAD27
Drainage area 161  square miles
Contributing drainage area 161  square miles
Gage datum 460.62 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 1908-10-01 -> 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
1 282 305 364 949 616 302 173 126 115 216 253 396
2 301 258 370 976 573 292 185 122 116 186 257 358
3 330 254 357 959 550 303 174 115 131 161 337 337
4 326 277 337 1,000 530 326 166 135 121 168 355 327
5 300 287 373 1,080 515 300 151 116 111 164 304 316
6 288 265 418 1,110 459 311 170 106 107 163 286 361
7 330 273 394 1,160 415 331 153 112 120 164 276 345
8 337 285 438 1,120 389 323 151 151 107 158 302 346
9 330 262 481 1,050 422 373 152 143 137 154 342 342
10 342 240 513 971 432 368 138 113 140 161 357 370
11 345 240 483 993 464 328 133 138 121 167 297 332
12 334 284 551 1,080 463 311 143 175 127 176 258 318
13 306 266 559 990 472 320 138 148 138 189 324 346
14 296 271 601 941 454 310 151 134 160 152 332 390
15 299 290 656 892 466 299 148 135 127 151 294 361
16 296 275 605 879 400 268 143 122 161 172 303 331
17 279 268 641 891 441 254 124 109 135 211 318 311
18 256 267 712 900 454 240 128 106 137 214 316 326
19 313 267 635 919 460 225 131 94 162 217 294 329
20 287 274 638 863 426 208 154 86 180 257 315 335
21 270 277 737 841 404 224 137 81 209 238 303 283
22 362 335 690 847 430 200 154 102 205 232 311 279
23 331 339 696 808 391 195 178 103 136 280 324 343
24 305 359 717 789 394 193 161 138 136 345 294 329
25 374 410 753 795 392 178 140 137 140 309 295 336
26 397 435 788 787 378 205 116 146 147 297 276 350
27 395 444 823 730 357 189 160 104 146 284 356 343
28 354 429 911 679 325 187 154 108 155 238 358 351
29 328 433 852 674 316 185 142 145 189 241 388 351
30 309   863 619 314 189 154 162 214 266 365 340
31 296   879   313   143 123   262   323