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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° 00’22", long 71°
30’13", Providence County, Hydrologic Unit 01090003, on
right bank 50 ft upstream from Peters River pressure conduit at
Woonsocket. Records include flow of Peters River.
DRAINAGE AREA--416 mi2.
PERIOD OF RECORD--Discharge: February 1929 to current year.
Water-quality records: Water years 1952–53, 1957–58, 1962–67.
REVISED RECORDS--WSP 756: drainage area. WSP 781: 1931(M). WSP 871: 1938. WSP 1051: 1931.
GAGE--Data Collection Platform with satellite telemeter. Datum of gage is 107.42 ft above sea level.
REMARKS--Flow regulated by powerplants, by West Hill Reservoir since May 1961, and by other reservoirs upstream. Extremes and figures of daily discharge include flow diverted from Nashua River basin and, at times since January 1966, from Quabbin Reservoir for supply of Worcester, MA, and, prior to July 1964, flow diverted around station in Hamlet Trench.
COOPERATION BY--Ocean State Power
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Value Apr 20