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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 41o56'02", long
70o57'25", Plymouth County, Hydrologic Unit
01090004, on right bank at bridge on Titicut Road, 1 mi upstream from
Sawmill Brook, 3.5 mi northwest of Middleboro, and 4.0 mi southeast of
DRAINAGE AREA--261 mi2.
PERIOD OF RECORD--October 1929 to April 1976, April 1985 to May 1988, October 1996 to current year. Published as "at State Farm" October 1929 to September 1969, and as "at State Farm near Bridgewater" October 1969 to April 1976.
REVISED RECORDS--WSP 781: 1934. WSP 1051: 1933. WSP 1201: 1931. WSP 1301: 1930(M), 1933(M), 1935(M). WDR MA-RI-84-1: drainage area.
GAGE--Data Collection Platform with satellite telemeter. Datum of gage is 8.79 ft above NAVD 1988. Datum previously reported as 9.61 ft above NGVD 1929. Prior to October 1996, at sites 40 ft apart about 600 ft upstream: October 1929 to Sept. 30, 1931, inverted non-recording gage with zero of gage at 10.02 ft; Oct. 1, 1931, to June 8, 1934, non-recording gage, and June 9, 1934, to April 1976, April 1985 to May 1988, water-stage recorders, at present datum.
REMARKS--Flow affected by diversions to and from basin for municipal supplies. Flow regulated by reservoirs and, prior to about 1975, by powerplants upstream.
COOPERATION BY-- Massachusetts Department of Conservation and Recreation, Office of Water Resources.
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