Index Catalog // ScholarsArchive@OSU

Small circle subdivision method for development of global sampling grid

Creator:: Song, Lian
Abstract:: Modern environmental monitoring and modeling requires a good global grid system for survey sampling and accurate, spatially complete data collection of relevant environmental phenomena. A prime requirement for the global grid system is that the global sampling grids be regular and equal in area and have minimal shape distortion. None...
Resource Type:: Masters Thesis

Sensitivity analysis of the Catchment Modeling Framework (CMF) and use in evaluating two agricultural management scenarios

Creator:: Metta, John W. P.
Abstract:: Abstract Watershed-scale fate/transport modeling of contaminants is a tool that scientists and land managers can use to assess pesticide contamination to stream systems. The Catchment Modeling Framework (CMF) is a catchment-scale fate/transport modeling tool. It was developed to help scientists and land managers assess the effects of possible land-use decisions...
Resource Type:: Masters Thesis
Full Text:: simple mathematical techniques derived from Equation 2.4 are invalid methods. 10 (a) Model response

A coupled hydrologic-geomorphic model for evaluating effects of vegetation change on watersheds

Creator:: Duan, Jinfan
Abstract:: This work describes the modeling framework and initial results for CLAWS (Coupled Landscape And Water System), a physically-based, spatially-distributed hydrologicgeomorphic model that has been coupled with a vegetation dynamics simulation. Spatial variability of topography, soil, vegetation, and climate drive a hydrology module that calculates the water budget at given time...
Resource Type:: Dissertation

Post-accident radiocesium uptake in eastern Oregon wheat crops : A preliminary estimate using a modified "PATHWAY" model

Creator:: Palotay, Joshua A.
Abstract:: An experimental environmental uptake model was developed for the purpose of estimating the final harvest concentration of contaminant following an acute accidental release of radiocesium onto an eastern Oregon winter wheat crop. The system was developed using the PATHWAY environmental uptake model as presented by Whicker and Kirchner (1987) for...
Resource Type:: Masters Thesis
Full Text:: experimental environmental uptake model was developed for the purpose of estimating the final harvest

A comparison of selected analyses for estimating environmental variation in early generations and advanced lines of wheat (Triticum aestivum L. em thell)

Creator:: Khan, Noor-ul Islam
Abstract:: This investigation was motivated by the introduction of the new nearest neighbour analyses which reportedly provided a better control of soil gradients than conventional experimental methods. Three nearest neighbour analyses and six other analyses were compared with the completely randomized design or the randomized complete block design in reducing the...
Resource Type:: Dissertation
Full Text:: environmental variation in early generations and advanced lines of wheat (Triticum aestivum L. em thell) AN

Statistical analysis and speciation modeling of copper in Oregon highway runoff

Creator:: Bloomquist, Don J.
Abstract:: Low levels of copper have been shown to impair the olfactory system of threatened and endangered (T&E) salmon, decreasing their predator avoidance behavior and likely increasing mortality. However, only dissolved copper (dissCu) present as the cupric ion (Cu2+) and weakly complexed species are truly bioavailable. Previous studies indicate the vast...
Resource Type:: Masters Thesis
Full Text:: entered into a chemical equilibrium model to predict copper speciation. The results of this study show

Traffic and greenhouse gas modeling in future land use development scenarios of Skagit County

Creator:: Mooney, Abraham A.
Abstract:: Energy use and greenhouse gas emissions are on the forefront of planning policy in the world today. In the U.S., the transportation sector accounts for 50 percent of greenhouse gas (GHG) emissions, the most of any single sector. State and local levels of government have been very proactive in the...
Resource Type:: Masters Thesis
Full Text:: that the scope of the model be the same as that of the Highway Performance Monitoring System (HPMS

Potential impacts of climate change on vegetation distributions, carbon stocks, and fire regimes in the U.S. Pacific Northwest

Creator:: Rogers, Brendan M.
Abstract:: The U.S Pacific Northwest contains a wide variety of ecosystems, all subject to relatively dry summers and wet winters. As has been shown with paleoclimatic and paleoecological data, the region is vulnerable to changes in climate. We assessed the sensitivities of vegetation distributions, carbon stocks, and fire regimes to 21st...
Resource Type:: Masters Thesis
Full Text:: Environmental Sciences presented on July 31, 2009. Title: Potential Impacts of Climate Change on Vegetation

Using a heuristic programming method for incorporating wildlife habitat constraints into spatial harvest scheduling on the Elliott State Forest

Creator:: Lennette, Marie
Abstract:: The Elliott State Forest, located in the Coast Range of Oregon, is currently revising their Habitat Conservation Plan (HCP). Many of the constraints in the HCP are spatial, requiring identification of specific parcels in order to limit activity along habitat reserves, limit harvest opening size, and to coordinate activities within...
Resource Type:: Masters Thesis
Full Text:: harvest units. To model the Elliott, the state forest planning team divided the 93,000 acres into 17

The effects of community composition, landscape structure, and climate on host-pathogen interactions

Creator:: Moore, Sean M.
Abstract:: Like other species interactions in ecological systems, host-pathogen interactions are influenced by environmental factors, landscape characteristics and the broader community context. My thesis explores the potential influences of food-web interactions (Chapter 2), climate change (Chapter 3), landscape structure and host movement patterns (Chapter 4), and the combined influences of local...
Resource Type:: Dissertation
Full Text:: model parameter variables. Sourya Shresta also helped with mathematical analyses and all authors

ScholarsArchive@OSU

Small circle subdivision method for development of global sampling grid

Sensitivity analysis of the Catchment Modeling Framework (CMF) and use in evaluating two agricultural management scenarios

A coupled hydrologic-geomorphic model for evaluating effects of vegetation change on watersheds

Post-accident radiocesium uptake in eastern Oregon wheat crops : A preliminary estimate using a modified "PATHWAY" model

A comparison of selected analyses for estimating environmental variation in early generations and advanced lines of wheat (Triticum aestivum L. em thell)

Statistical analysis and speciation modeling of copper in Oregon highway runoff

Traffic and greenhouse gas modeling in future land use development scenarios of Skagit County

Potential impacts of climate change on vegetation distributions, carbon stocks, and fire regimes in the U.S. Pacific Northwest

Using a heuristic programming method for incorporating wildlife habitat constraints into spatial harvest scheduling on the Elliott State Forest

The effects of community composition, landscape structure, and climate on host-pathogen interactions

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