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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°27'18", long 72°22'56",
Franklin County, Hydrologic Unit 01080204, on left bank 800 ft
downstream from State Route 202 and 1.4 mi east of
DRAINAGE AREA--12.6 mi2.
PERIOD OF RECORD--November 1983 to September 1985, April 1995 to current year.
GAGE--Data Collection Platform with satellite telemeter. Elevation of gage is 540 ft above National Geodetic Vertical Datum of 1929, from topographic map.
REMARKS--Records greater than about 100 ft3/s are considered poor.
This gage is monitored in cooperation with
the Massachusetts Water Resources
Value Apr 23