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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 01102000 IPSWICH RIVER NEAR IPSWICH, MA


Essex County, Massachusetts
Hydrologic Unit Code 01090001
Latitude  42°39'35", Longitude  70°53'39" NAD27
Drainage area 125  square miles
Contributing drainage area 125  square miles
Gage datum 19.83 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 1929-10-01 -> 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
1 202 238 326 552 317 176 93 67 36 60 118 189
2 202 228 326 574 306 179 91 60 36 59 118 191
3 201 225 331 581 296 184 89 55 36 57 119 193
4 199 229 335 574 288 187 87 53 37 56 119 193
5 200 231 347 567 281 188 85 50 38 57 120 190
6 196 232 363 564 276 189 83 47 37 58 123 189
7 195 230 379 555 268 195 80 44 35 64 125 193
8 195 227 389 535 259 204 76 42 34 74 126 203
9 195 221 399 506 253 204 74 41 33 77 127 210
10 197 217 405 475 253 198 74 41 33 76 128 219
11 203 215 408 453 256 190 73 41 33 73 134 220
12 208 212 414 439 258 182 73 42 34 71 141 218
13 208 210 417 430 258 175 72 43 37 69 146 220
14 204 213 429 423 265 171 71 43 40 67 149 220
15 203 214 452 413 277 171 68 42 41 67 155 220
16 202 220 474 410 280 168 65 42 41 68 160 216
17 199 228 485 408 277 162 62 41 43 71 164 214
18 193 235 497 408 270 155 58 41 45 74 165 213
19 190 245 508 408 261 145 55 41 48 77 164 210
20 186 252 513 398 250 137 53 42 53 81 163 206
21 185 254 510 382 240 130 52 43 58 94 162 205
22 186 256 518 369 231 124 52 43 61 110 160 203
23 192 257 531 366 222 118 54 42 62 119 161 200
24 201 261 538 357 214 113 61 41 61 120 162 199
25 216 276 529 351 206 110 68 41 59 117 164 200
26 234 297 517 345 207 108 70 40 58 114 169 201
27 253 316 506 340 207 106 69 39 58 112 175 208
28 267 325 500 335 202 102 68 38 59 112 180 212
29 265 328 506 330 195 99 65 36 60 112 186 214
30 262   516 324 186 96 64 36 61 113 187 211
31 250   532   178   64 36   115   206