USGS - science for a changing world

Oregon Water Science Center

 Home Science Data/Tools Publications News

30-Days of Pre- and Post-Aeration Oxygen Percent Saturation at the Fernhill Wetlands Outfall (453016123052400)

Site has been removed for the winter season. Look for it to be reinstalled in April, 2020.

The Fernhill Wetlands outfall discharges to the Tualatin River downstream of Fern Hill Road at river mile 55.2. Data are collected on the half hour.

Two dissolved-oxygen sensors are installed at this site. One is just upstream of the outfall (pre-aeration) and one is just downstream of a set of aerators located near the outfall's exit pipe (post-aeration). Both dissolved-oxygen sensors have an accuracy of plus or minus 0.1 to 0.2 milligrams per liter. Despite our best efforts to keep these probes calibrated and operating within specifications, some instrumental drift and periodic problems may occur.

Data in the graph below are plotted against the axis of the same color. Percent saturation is estimated as a function of water temperature at this site and barometric pressure at a nearby site.

These data are provisional and are subject to revision.

Graph updated: Sunday - Aug 9, 2020 at 23:08:18 EDT

graph comparing pre- and post-aeration oxygen saturation


Accessibility FOIA Privacy Policies and Notices logo U.S. Department of the Interior | U.S. Geological Survey
Page Contact Information: Stewart Rounds
Page Last Modified: Wednesday - Jun 5, 2019 at 15:37:03 EDT