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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° 59’47", long 71°
33’47", Providence County, Hydrologic Unit 01090003, on left
bank, 20 ft upstream from abandoned bridge site, 400 ft downstream from
milldam at Forestdale, 1 mi east of Slatersville, and 1.6 mi upstream
DRAINAGE AREA--91.2 mi2.
PERIOD OF RECORD--Discharge: September to December 1909 and January 1912 to July 1913 (gage heights only; published as "at Branch Village"), January 1940 to current year.
Water-quality records: Water years 1954, 1968, 1979-2002.
REVISED RECORDS--WSP 2101: drainage area.
GAGE--Data Collection Platform with satellite telemeter. Elevation of gage is 180 ft above National Geodetic Vertical Datum of 1929, from topographic map. Prior to July 28, 1913, non-recording gage at site 1 mi downstream at different datum.
REMARKS--Occasional regulation by pond upstream. Prior to 1957, greater regulation by mills and reservoirs upstream.
COOPERATION BY--Rhode Island Department of Environmental Management
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Value Apr 24