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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 422302071083801 FRESH POND IN GATE HOUSE AT CAMBRIDGE, MA

PROVISIONAL DATA SUBJECT TO REVISION

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LOCATION--Middlesex County, Hydrologic Unit 01090001, Fresh Pond, Cambridge MA.
DRAINAGE AREA--Glacial kettle-hole lake with no natural inputs or outputs.
PERIOD OF RECORD--October 01, 2003 to current year.
GAGE--Reservoir-stage monitor, reservoir water-temperature and specific conductance water-quality monitor, air temperature monitor, and a heated tipping-bucket precipitation gage. Telephone telemeter at station. Datum of gage is referenced to the City of Cambridge datum, subtract 10.84 feet to elevations to adjust to National Geodetic Vertical Datum of 1929.
REMARKS--none
COOPERATION BY--Cambridge Water Department


Daily and unit values precipitation data are calibrated and quality assured prior to publication by the Massachusetts-Rhode Island Water Science Center. Data are available upon request.
Available Parameters Available Period
All 7 Available Parameters for this site
  
00010 Temperature, water 2007-10-01  2018-12-18
00020 Temperature, air 2007-10-01  2018-12-18
00045 Precipitation 2009-10-01  2018-12-18
00062 Elevation, reservoir 2007-10-01  2018-12-18
00095 Specific cond at 25C 2007-10-01  2018-12-18
50050 Flow, conduit or TP 2007-10-01  2018-12-18
72022 Reservoir storage 2007-10-01  2018-12-18

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Temperature, water, degrees Celsius

Most recent instantaneous value: 3.3 12-18-2018   09:45 EST
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Precipitation, total, inches

Most recent instantaneous value: 0.00 12-18-2018   09:45 EST
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Specific conductance, water, unfiltered, microsiemens per centimeter at 25 degrees Celsius

Most recent instantaneous value: 715 12-18-2018   09:45 EST
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