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USGS Current Conditions for Massachusetts: Build Current Table

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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.



Select sites which meet all of the following criteria:
Define one or more values for each of the following site-selection criteria: --- or select new criteria
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 Available parameters -- select sites that have data for the following parameters:
Enter numbers to choose parameters and order columns in the output --or-- Select all.
  Station name
  Date and time
Water Level/Flow Parameters
  Streamflow, ft³/s   (152 sites)
  Elevation of reservoir water surface above datum, ft   (6 sites)
  Gage height, ft   (141 sites)
  Lake or reservoir water surface elevation above NGVD 1929, ft   (2 sites)
  Estuary or ocean water surface elevation above NAVD 1988, ft   (3 sites)
  Tide stage, above datum, ft   (3 sites)
  Depth to water level, ft below land surface   (86 sites)
  Reservoir storage, Mgal   (3 sites)
  Mean Stream velocity, ft/s   (2 sites)
  Long-term mean daily streamflow, ft³/s
  Long-term median daily streamflow, ft³/s
Water Quality Parameters
  Temperature, water, °C   (44 sites)
  Specific conductance, water, unfiltered, µS/cm at 25 °C   (34 sites)
  Dissolved oxygen, water, unfiltered, mg/L   (20 sites)
  Dissolved oxygen, water, unfiltered, %saturation   (7 sites)
  pH, water, unfiltered, field, standard units   (8 sites)
  Chlorophyll a, fluorometric method, uncorrected, µg/L   (2 sites)
  Colored dissolved organic matter (CDOM), water, in situ, single band excitation, fluorescence emission, ppb QSE   (1 sites)
  Chlorophyll a, estimated, water, in-situ, in-vivo fluorescence, RFU   (1 sites)
  Chlorophylls, water, in situ, fluorometric method, excitation at 470 +-15 nm, emission at 685 +-20 nm, ug/L   (1 sites)
  Phycocyanins (cyanobacteria), water, in situ, fluorometric method, excitation at 590 +-15 nm, emission at 685 +-20 nm, µg/L   (1 sites)
  Chlorophylls, water, in situ, fluorometric method, excitation at 470 +-15 nm, emission at 685 +-20 nm, relative fluorescence units, RFU   (1 sites)
  Chlorophyll, total, water, fluorometric, 650-700 nanometers, in-situ sensor, µg/L   (1 sites)
  Turbidity, water, unfiltered, monochrome near infra-red LED light, 780-900 nm, detection angle 90 +/-2.5 degrees, FNU   (7 sites)
  Salinity, water, unfiltered, practical salinity units at 25 °C   (5 sites)
  Nitrate plus nitrite, water, in situ, mg/L as N   (2 sites)
  Sodium, water, filtered, estimated by regression equation, mg/L   (1 sites)
  Chloride, water, filtered, estimated by regression equation, mg/L   (10 sites)
Meteorological Parameters
  Temperature, air, °C   (8 sites)
  Barometric pressure, mmHg   (3 sites)
  Wind speed, mph   (5 sites)
  Wind direction, degrees clockwise from north   (5 sites)
  Precipitation, total, in   (23 sites)
 
  Relative humidity, percent   (3 sites)
  Snow depth, ft   (1 sites)
Physical Properties Parameters
  Flow, in conduit or through a treatment plant, Mgal/d   (1 sites)
  Barometric pressure, uncorrected, psi   (1 sites)
 
Choose Output Format
Display Summary of Selected Sites
Choose one of the following options for displaying descriptions of the sites meeting the criteria above:
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Show sites on a mapNew
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Table of sites
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Scroll list of sites -- allows selection of data for multiple sites
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Brief descriptions -- allows selection of data for multiple sites
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        (Select fields to include in site-description output)
       
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Save file of selected sites to local disk for future upload

Retrieve Current data for Selected Sites
Choose one of the following options for displaying data for the sites meeting the criteria above
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Table of data
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Tab-separated data *

 * Save compressed files with a .gz file extension.