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Filtering by: Subject Nitrates -- Environmental aspects -- Oregon -- Morrow County Remove constraint Subject: Nitrates -- Environmental aspects -- Oregon -- Morrow County Subject Groundwater -- Pollution -- Oregon -- Willamette River Valley Remove constraint Subject: Groundwater -- Pollution -- Oregon -- Willamette River Valley

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Quantification of the nitrate attenuation capacity of low-permeability Missoula Flood deposits in the Willamette Valley of Oregon

Creator:

Arighi, Louis M.

Abstract:

Low-permeability geologic units may offer significant chemical and hydraulic protection of adjacent aquifers, and are important for managing groundwater quality, especially in areas with significant non-point source contamination. Nitrate in the Willamette Valley is attenuated across the Willamette Silt, a semi-confining unit overlying a regionally important aquifer. To quantify the...

Resource Type:

Masters Thesis

Full Text:

Survey, the Oregon Department of Environmental Quality, and ChevronTexaco. TABLE OF CONTENTS
Temporal and spatial variability of groundwater nitrate in the southern Willamette Valley of Oregon

Creator:

Mutti, Jeffrey Glenn

Abstract:

Groundwater nitrate contamination is a well-documented issue in the Southern Willamette Valley (SWV) of Oregon, as a Groundwater Management Area (GWMA) has recently been declared. As a GWMA, groundwater nitrate monitoring must occur until regional concentrations are below 7 mg/L NO3-N. However, the presence of temporal variability can make it...

Resource Type:

Masters Thesis

Full Text:

Oregon Abstract approved: Roy D. Haggerty Groundwater nitrate contamination is a well
An eleven year study of nitrate leaching in vegetable production with winter cover crops

Creator:

Feaga, Jeff

Abstract:

The Willamette Valley of Oregon has high rates of winter precipitation that cause leaching losses of residual fertilizer nitrogen (N) as nitrate (NO₃). Cover crops may have potential to mitigate N loss. Shallow groundwater was sampled for 11 years from plots planted in summer vegetables with and without winter cover...

Resource Type:

Masters Thesis
Chemical and isotopic patterns of nitrate variability in the southern Willamette Valley, Oregon

Creator:

Vick, Christopher Flanders

Abstract:

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...

Resource Type:

Masters Thesis

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Academic Affiliation

Geosciences2
Bioresource Engineering1

Advisor

Haggerty, Roy D.2
Selker, John S.2

Commencement Year

Commencement Year range begin – Commencement Year range end

Current results range from 2004 to 2007

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Committee Member

Bolte, John2
Wildenschild, Dorthe2
Cuenca, Richard1
Dick, Richard1
Gamroth, Mike1
more Committee Members »

Creator

Arighi, Louis M.1
Feaga, Jeff1
Mutti, Jeffrey Glenn1
Vick, Christopher Flanders1

Date

Date range begin – Date range end

Current results range from 2003 to 2006

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Decade

2000-20094

Degree Field

Geology2
Bioresource Engineering1
Water Resources Engineering1
Water Resources Science1

Degree Level

Master's4

Degree Name

Master of Science (M.S.)4

File Format

application/pdf1

Language

English [eng]4

License

All rights reserved4

Non-Academic Affiliation

Oregon State University. Graduate School4

Peer Reviewed

No3

Resource Type

Masters Thesis4

Rights Statement

In Copyright4

Subject

Groundwater -- Pollution -- Oregon -- Willamette River Valley[remove]4
Nitrates -- Environmental aspects -- Oregon -- Willamette River Valley4
Agricultural pollution -- Oregon -- Willamette River Valley1
Cover crops -- Oregon -- Willamette River Valley1
Groundwater -- Nitrogen content -- Oregon -- Willamette River Valley1
more Subjects »

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