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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.



USGS 01097300 NASHOBA BROOK NEAR ACTON, MA

PROVISIONAL DATA SUBJECT TO REVISION

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LOCATION--Lat 42°30’45", long 71°24’17", Middlesex County, Hydrologic Unit 01070005, river-level sensor on right bank, 15 ft above footbridge, 500 ft downstream from old millpond and dam at North Acton, 2.2 mi northeast of Acton, and 5 mi upstream from mouth at Assabet River at West Concord.
DRAINAGE AREA--12.8 mi2.
PERIOD OF RECORD--Discharge: July 1963 to current year.
GAGE--Data Collection Platform with satellite telemeter. Elevation of gage, about 155 ft above National Geodetic Vertical Datum of 1929, from topographic map.
COOPERATION BY--Massachusetts Department of Conservation and Recreation, Office of Water Resources.

Photo of Nashoba Brook and footbridge near Acton

Boating safety tips
This station managed by the Northborough MA Field Office.

Available Parameters Available Period
All 2 Available Parameters for this site
  
00060 Discharge 1990-10-01  2018-01-16
00065 Gage height 2007-10-01  2018-01-16

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


Discharge, cubic feet per second

Most recent instantaneous value: 22.9 01-16-2018   09:45 EST
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Daily discharge, cubic feet per second -- statistics for Jan 16 based on 53 years of record more
Min
(1966)
25th
percen-
tile
Median Mean Most Recent
Instantaneous
Value Jan 16
75th
percen-
tile
Max
(2005)
1.90 7.4 14 21 22.9 27 84.0


Gage height, feet

Most recent instantaneous value: 4.21 01-16-2018   09:45 EST
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