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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 41° 56’51", long 71°
10’38", Bristol County, Hydrologic Unit 01090004, on left
bank 200 ft downstream from bridge on State Highway 140, 0.9 mi
upstream from confluence with Rumford River, and 1.5 mi southeast of
DRAINAGE AREA--43.3 mi2.
PERIOD OF RECORD--Discharge: June 1925 to current year.
Water-quality records: Water year 1967–68, 1999.
REVISED RECORDS--WSP 871: 1938. WSP 1301: 1929–33(M). WSP 1621: 1925–58 (monthly runoff). WDR MA-RI-84-1: drainage area.
GAGE--Data Collection Platform with satellite telemeter. Datum of gage is 54.35 ft above NAVD 1988. Datum previously reported as 55.14 ft above NGVD 1929. Prior to Oct. 1, 1930, non-recording gage at same site at datum 0.62 ft higher and Oct. 1, 1930, to May 5, 1933, at same site at present datum.
REMARKS--Flow regulated to some extent by Lake Mirimichi and other lakes and reservoirs upstream. Diversion upstream for municipal supply of Attleboro and small diversions to and from basin for other municipal supplies.
COOPERATION BY-- Massachusetts Department of Conservation and Recreation, Office of Water Resources.
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