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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 01104705 CHARLES RIVER AT FIRST ST AT CAMBRIDGE, MA

PROVISIONAL DATA SUBJECT TO REVISION

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LOCATION--Lat 42o21'44", long 71o04'43", Suffolk County, Hydrologic Unit 01090001, on left bank, 100 ft downstream from Longfellow Bridge, at intersection of Broad Canal and First St. Bridge, Cambridge, MA..
DRAINAGE AREA--309 mi2, excludes 23.6 mi2 drained by Stony Brook, from which flow is diverted for municipal supply for Cambridge.
PERIOD OF RECORD--January 2007 to current year.
GAGE--Data Collection Platform with telephone telemeter.
DATUM--Datum of gages are from the Massachusetts Metropolitan District Commission base, which is 105.62 ft higher than NGVD 1929.
REMARKS--Stage may be affected by operation of the New Charles River Dam about 1 mile downstream.
COOPERATION BY--Massachusetts Department of Conservation and Recreation, Division of Planning and Engineering

This station managed by the Northborough MA Field Office.

Available Parameters Available Period
  
2007-10-01  2021-01-21







 (7)
 
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Summary of all available data for this site
Instantaneous-data availability statement

Gage height, feet
Most recent instantaneous value: 107.62 01-21-2021   20:00 EST
Graph of Gage height, feet

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