The Clean Water Act imposes Total Maximum Daily Load (TMDL) limits on pollutant concentrations within wastewater effluent; in Oregon, thermal discharge is one of the pollutants subject to regulation. The City of Woodburn, Oregon, funded a series of pilot scale studies to investigate the utility of natural systems to reduce...
Oregon Revised Statute 541.409, which created the Independent Multidisciplinary Science Team (IMST), specifies that agencies are to respond to the recommendations of the IMST, stating “(3) If the Independent Multidisciplinary Science Team submits suggestions to an agency responsible for implementing a portion of the Oregon Plan [for Salmon and Watersheds],...
The consequences of species introductions into non-native habitats are a major cause of concern in the U.S. An introduced species may alter native habitats, cause economic damage, compete with natives for resources or prey on them. Of particular interest are the effects of predation by introduced fishes on native amphibians....
Fire is a fundamental disturbance that drives terrestrial and atmospheric carbon dynamics. Previous studies have quantified fire effects on carbon cycling from local to global scales but have focused nearly exclusively on high-severity, stand-replacement fire. Since 2002, variable-severity wildfires have burned more than 65 000 ha across the east slope...
A relatively stable, persistent and historical problem with elevated NO₃⁻ concentrations in rural drinking wells in the southern Willamette Valley, Oregon is evident. What is the origin of NO₃⁻ in rural drinking water wells in this area? The answer to the question is not simple. Many non-point sources contribute to...
Esmond Creek is a tributary to the Siuslaw River located in the Oregon Coast Range. It is 18 km in length and drains a watershed area is 48.9 km². Average channel gradient of the study reach is 0.9%. In 1988 a landslide
occurred in the Esmond Creek watershed involving approximately...
The Port of Astoria has proposed to fill a 32.4 hectare inter- and
subtidal area at the mouth of Youngs Bay, Columbia River, Oregon. The
possible effects of this fill on the biota and sedimentation patterns
of this area were studied from 31 August 1975 to 29 February 1976. Part...
Our major effort since initiation of this contract has been directed
toward (1) procuring the gamma-ray spectrometric equipment and integrating
the components into an operational system, and (2) analyzing
the samples obtained from the midwater trawl program of the Department
of Oceanography and evaluating and interpreting the resulting data
Analyses...
This report covers the first full year of operation of our gammaray
spectrometry facility. A part of the contract period was devoted
to calibration of the instrument, and therefore, a brief report on this
procedure is included.