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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.


* IMPORTANT: Next Generation Station Page

USGS 420610071421402 MA-NXW 54 NORTHBRIDGE, MA

PROVISIONAL DATA SUBJECT TO REVISION

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LOCATION--Lat 42o06'10", long 71o42'14", Worcester County, Hydrologic Unit 01090003, visable from on ramp, exit 5 off RT 146 in Northbridge, Ma.
AQUIFER--Sand and gravel, glaciated regions; ice contact deposits aquifer.
WELL CHARACTERISTICS--Augered observation water-table well, diameter 2.0 in, depth 12.0 ft.
INSTRUMENTATION--Data Collection Platform with celluar telephone telemeter, September 2017 to current year.
Monthly measurement prior to September 2017.
DATUM--Elevation of land-surface datum is 370 ft above National Geodetic Vertical Datum of 1929, from topographic map.
Measuring point: 2.87 ft. top of protective casing.
PERIOD OF RECORD--August 1984 to current year.
COOPERATION BY--Massachusetts Department of Conservation and Recreation, Office of Water Resources.

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Available Parameters Available Period
  
2017-08-31  2020-02-22








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