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ICE EFFECTS ON STREAMFLOW During winter, ice formation may cause stage and discharge values to appear higher than expected. Ice effects may be minor (occurring only at night and early morning) with baseline flows obvious, or the effects may be major (stage constantly increases over several days or weeks) resulting in greatly erroneous discharge. Streamgages experiencing minor ice conditions will continue to display stage and discharge values to enable users to estimate the approximate base-line stage and discharge. Streamgages experiencing major ice conditions will have the discharge record temporarily disabled to prevent use of erroneous discharge values. The discharge record will resume when it is determined that ice conditions are no longer present. Daily mean discharges during periods of ice effect will be estimated after detailed data analysis.

USGS 01103025 ALEWIFE BROOK NEAR ARLINGTON, MA

PROVISIONAL DATA SUBJECT TO REVISION

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LOCATION

LOCATION--Lat 42o24'25", long 71o08'04", Middlesex County, Hydrologic Unit 01090001, on downstream side of Broadway Street bridge, in Arlington, Ma. 0.6 mi upstream from the mouth at the Mystic River.
DRAINAGE AREA--8.36 mi2.
PERIOD OF RECORD--August 2005 to current year. Intermittent discharge measurements, 1973-74, 1999-2000.
GAGE--Data Collection Platform and velocity sensor with high-data-rate satellite telemeter.
REMARKS--Stage is occasionally affected by regulation of the Mystic River from gate changes and lock operations at Amelia Earhart Dam, located about 3.7 mi downstream from the mouth of Alewife Brook at the Mystic River.
COOPERATION BY--A-B-C Stormwater Flooding Board (Arlington, Belmont, Cambridge)

ICE EFFECTS ON STREAMFLOW During winter, ice formation in streams can cause stage and corresponding discharge values to appear higher than expected during periods of no precipitation. Ice effects from partial ice cover or shore ice may be minor, where stage and discharge appear to increase at night and decrease to base-line conditions around midday for one or more days. Major ice effects from complete ice cover appear as constantly increasing stage and discharge over several days during prolonged cold periods. Stage and discharge values for streams experiencing minor ice effects will continue to be displayed on the web to enable the user to estimate the approximate base-line discharges. Note that this method of estimation should only be used when no runoff occurs. During periods of major ice effects, display of discharge data on the web will be temporarily discontinued to prevent misuse of erroneous discharge data. The discharge record will resume when it is determined that ice conditions are no longer present. Display of stage data during periods of minor and major ice effects will continue to be displayed on the web. Daily mean discharges will be estimated for all periods of ice-effected discharges.

Photo of Alewife Brook gage

Boating safety tips
Available Parameters Available Period
All 3 Available Parameters for this site
  
00065 Gage height 2007-10-01  2015-08-30
00055 Stream velocity 2007-10-01  2015-08-30
00060 Discharge 2007-10-01  2015-08-30

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Gage height, feet

Most recent instantaneous value: 2.07   08-30-2015  18:15 EDT
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Discharge, cubic feet per second

Most recent instantaneous value: 3.4   08-30-2015  18:15 EDT
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Daily discharge, cubic feet per second -- statistics for Aug 30 based on 9 years of record more
Min
(2007)
25th
percen-
tile
Most Recent
Instantaneous
Value Aug 30
Median Mean 75th
percen-
tile
Max
(2011)
2.8 3.0 3.4 3.8 6.4 8.1 21