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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°29'18", long 71°32'10",
Washington County, Hydrologic Unit 01090005, in parking lot for Thomas
Ryan Center, University of Rhode Island, and 0.9 mi northwest of South
AQUIFER--Sand and gravel, glaciated regions, stratified deposits.
WELL CHARACTERISTICS--Augered observation water-table well, diameter 10 in, depth 34 ft, open end.
INSTRUMENTATION--Digital recorder with cellular telephone telemeter, March 2014 to current year. Recorded digital data, October 1984 to March 2014. Graphic recorder with 5-day data, September 1976 to May 1988. Monthly measurements prior to September 1976.
DATUM--Elevation of land-surface datum of well is 111.89 ft above National Geodetic Vertical Datum of 1929. Measuring point: top of hole in base of shelter, 3.07 ft above land-surface datum.
PERIOD OF RECORD--February 1955 to current year.
COOPERATION--Rhode Island Water Resources Board.