USGS Current Conditions for USGS 01105880 HERRING RIVER AT NORTH HARWICH, MA

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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.

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USGS 01105880 HERRING RIVER AT NORTH HARWICH, MA

PROVISIONAL DATA SUBJECT TO REVISION

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LOCATION--Lat 41°41’56", long 70°06’38", Barnstable County, Hydrologic Unit 01090002, on right bank downstream side of bridge on Rt. 6 at North Harwich.
DRAINAGE AREA--9.4 mi².
PERIOD OF RECORD--June 1966 to September 1988, September 2007 to current year.
GAGE--Data Collection Platform with satellite telemeter. Datum of gage is 9.12 ft above NAVD 1988, estimated from topographic map. Datum previously reported as 10 ft above NGVD 1929, estimated from topographic map. Gage located 50 ft upstream at different datum during water years 1966-88.
REMARKS--Occasional regulation by cranberry bog upstream. This stream drains from a ground-water basin which is larger than, and not coincident with, the surface-water basin.
COOPERATION BY--Massachusetts Department of Conservation and Recreation, Office of Water Resources.