River & Stream Flow Monitoring

Station type descriptions

Washington State Department of Ecology

The Stream Hydrology Unit has categorized the operation of Ecology streamflow stations into two types: telemetry and manual stage height. This key determines the availability of data for each streamflow station.

Telemetry

A telemetry streamflow station transmits data every three hours to the Department of Ecology Headquarters in Olympia, Washington. The data is logged every fifteen minutes and transmitted in three hour blocks to Ecology where it is automatically imported into the streamflow database and published to Ecology's web page. The data is transmitted via either a GOES satellite transmitter or a standard dial-up modem.

Manual stage height

A manual-stage-height station does not contain a continuous record. A manual-stage-height station consists of a series of periodic gage readings related to a series of instream flow measurements. Gage readings are from either a standard staff gage, wire weight gage (WWG) or from a reference point (RP). An RP is a point located somewhere over the wetted width of the station cross-section where a measurement can be made to the water surface. The correlation between these gage readings and the instream flow measurements is used to develop a rating table for the site.