This paper examines the environmental factors influencing
the die-off and transport of fecal coliform bacteria
present in wastes applied to the land surface. These factors
are examined specifically for dairy waste management systems
and the net effect each system has on runoff water quality.
A model is developed that considers...
Two small adjacent watersheds on the west-central edge of the
Willamette Valley of western Oregon were studied. Information was
gathered on existing conditions to determine the suitability of the two
watersheds for a paired-watershed study design.
A soil survey was conducted using slightly modified soil series
previously established for the...
Diclofop-methyl [me yl 2-(4-(2,4-dichlorophenoxy) phenoxy) propanoate] hydrolysis, degradation, and leaching were studied in field and laboratory experiments. Greater than 75% of the applied diclofop-methyl hydrolyzed to diclofop in 2 days at 4°C, the prevailing soil temperature during western Oregon winters. Degradation beyond the diclofop molecule, also an active herbicide, was...
Research has been completed which identifies qualitatively and
quantitatively the deposition, persistence and fate of polynuclear
aromatic hydrocarbons (PNAH) on burned clear-cut sites in Oregon.
Eight PNAH were identified and quantified in post-burn litter samples
taken from four slash-burned sites. Deposition of lower
molecular weight, 3-4 ring compounds was considerably...
Dumping drilling mud from offshore drilling rigs into the
ocean could have a negative impact on the marine environment. Due
to this possible impact, the Offshore Operators Committee (OOC) has
deemed it necessary to predict the fate of drilling mud discharged
into the ocean. Through the funding of OOC and...