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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 41o49'51", long
71o21'06", Providence County, Hydrologic Unit
01090003, on right bank on upstream side of bridge on State Highways 1A
and 114, and 0.7 mi upstream from mouth at East Providence.
DRAINAGE AREA--53.1 mi2.
PERIOD OF RECORD--October 1986 to current year.
GAGE--Data Collection Platform with satellite telemeter. Datum of gage is 4.18 ft above NAVD 1988, estimated from topographic map. Datum previously reported as 5 ft above NGVD 1929, estimated from topographic map.
REMARKS--Flow affected by regulations and diversions from upstream reservoirs.
COOPERATION--Rhode Island Department of Environmental Management
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Value May 12