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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.
LOCATION--Lat 42° 23'36", long 72° 14'21",
Worcester County, Hydrologic Unit 01080204, on left bank 100 ft above
spillway of regulating dam at Quabbin Reservoir and 4.6 mi northwest of
DRAINAGE AREA--43.7 mi2.
PERIOD OF RECORD--Discharge: January 1937 to current year. Published as "near Dana" January 1937 to September 1939.
Water-quality records: Water year 1957.
GAGE--Data Collection Platform. Data are recorded at 15-minute intervals and updated hourly via satellite. Concrete spillway since March 12, 1940. Datum of gage is 504.70 ft above National Geodetic Vertical Datum of 1929.
This gage is monitored in cooperation with the Massachusetts Department of Conservation and Recreation, Division of Water Supply Protection, Office of Watershed Management, with funding from the Massachusetts Water Resources Authority .
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Value Feb 25