Index Catalog // ScholarsArchive@OSU

Evaluation of stream temperature spatial variation using distributed temperature sensing

Creator:: O'Donnell, Tara
Abstract:: Water temperature in rivers and streams is an important factor for aquatic ecosystem health. Measurement of stream temperature has traditionally been accomplished by point temperature measurements, continuous point temperature loggers, and more recently, airborne remote sensing techniques such as Forward-Looking Infrared Radar (FLIR) or Thermal Infrared Radiometry. While each of...
Resource Type:: Masters Thesis
Full Text:: : John S. Selker Water temperature in rivers and streams is an important factor for aquatic ecosystem

High frequency water vapor density measurements using the beat frequency method

Creator:: Elorriaga Montenegro, Estefania
Abstract:: This document describes the design and deployment of a first generation water vapor density sensing unit, the HumiSense. This device is based on an open, air-filled capacitor which is part of a resonant circuit. The frequency of the resonant circuit mixed with a fixed frequency oscillator is the basis of...
Resource Type:: Masters Thesis
Full Text:: Major I. Professor John S. Selker ©Copyright by

Mixing and Finger Morphologies in Miscible Non-Newtonian Fluid Displacement

Creator:: Mehr, Nicole
Abstract:: We found unexpected complexities resulting from the miscible displacement of a non-Newtonian fluid for both convergent and divergent flow as observed by displacing a miscible shear-thinning fluid (xanthan gum) in a radial Hele-Shaw cell. Such complex patterns have not been described before for either Newtonian or non- Newtonian fluids. A...
Resource Type:: Masters Thesis
Full Text:: : ______________________________________________________ John Selker We found unexpected complexities resulting from the miscible displacement of a

Drop it like it’s Hot : Combining DTS and Temperature Modeling to Evaluate Stream Restoration on the Middle Fork of the John Day River

Creator:: Hall, Austin
Abstract:: Temperature is a key factor for salmonid health and is an important restoration metric on the Middle Fork of the John Day River in northeast Oregon. In the past century, dredge mining, deforestation, and overgrazing have degraded stream habitat and resulted in greater daytime stream temperatures in the region. Recent...
Resource Type:: Masters Thesis
Full Text:: : _________________________________________________________________ John S. Selker Temperature is a key factor for salmonid health and is an important

Change in Hydraulic Conductivity of Expansive Soils

Creator:: Hesseltine, Johnathon
Abstract:: Swelling soils cause millions of dollars of damage to buildings every year in the Unites States alone. One essential piece to understanding these soils is to understand how water moves through them. Hydraulic conductivity is a measure of how easily water flows through a soil. Currently, the most common method...
Resource Type:: Honors College Thesis
Full Text:: . Abstract approved: ______________________________________________________ John Selker

Preventing the Accumulation of Fine Sediments in Sand Dam Reservoirs: An Analytical Framework and Flume Experiments

Creator:: Ellingson, Joseph M.
Abstract:: Sand dams – low-head dams built in ephemeral streambeds that store water within saturated sediments – are a proven means to increase water supplies for rural communities in arid and semiarid regions. Water percolates into the reservoir-impounded sediments during wet season rains and can subsequently be extracted during the dry...
Resource Type:: Masters Thesis
Full Text:: John S. Selker Sand dams – low-head dams built in ephemeral streambeds that store water within

Africa-Appropriate Urban Stormwater Management: The State of the Art

Creator:: Kahsai, Simon K.
Abstract:: Urban development causes changes in the hydrology, increasing stormwater runoff volumes, which often leads to flooding and ecosystem degradation. This is a common phenomenon in most urban Africa, due to lack of stormwater drainage infrastructures. Green Infrastructure (GI) has been shown to be an effective approach to lessen the effects...
Resource Type:: Masters Thesis
Full Text:: John S. Selker Urban development causes changes in the hydrology, increasing stormwater

Using Recession Analysis to Characterize Watershed Responses to Drought

Creator:: Jachens, Elizabeth R.
Abstract:: In the face of climate change droughts are predicted to become more persistent, further intensifying the need for accurately predicting the timing and magnitude of summer streamflow in rivers. In order to determine the sensitivity of a watershed to drought, there is a need to describe what these drought conditions...
Resource Type:: Dissertation
Full Text:: Drought. Abstract approved: John S. Selker In the face of climate change droughts are

Hyperspectral Disease Detection - Strategies Addressing Time, Space, Machine Learning, and Plant Susceptibility

Creator:: Haagsma, Marja
Abstract:: Finding trees and crops that are resistant to pathogens is key in preparing for current and future disease threats. In this dissertation, we analyzed the potential of using hyperspectral imaging (HSI) to find infection while identifying issues and strategies addressing differences over time, in spatial resolution, the application of machine...
Resource Type:: Dissertation
Full Text:: : ______________________________________________________ John S. Selker Finding trees and crops that are

Surface Water and Groundwater Interactions in the Walla Walla River, Northeast Oregon, USA : A Multi-Method Field-Based Approach

Creator:: Gryczkowski, Landon
Abstract:: Surface water and groundwater interactions are a key component in the functioning of stream ecosystems. Exchange of water between the stream and the hyporheic zone creates habitat for aquatic organisms and serves as a control for stream biogeochemical, thermal, and flow processes. This study takes a multi-method field-based approach to...
Resource Type:: Dissertation
Full Text:: : John S. Selker Surface water and groundwater interactions are a key component in the

ScholarsArchive@OSU

Evaluation of stream temperature spatial variation using distributed temperature sensing

High frequency water vapor density measurements using the beat frequency method

Mixing and Finger Morphologies in Miscible Non-Newtonian Fluid Displacement

Drop it like it’s Hot : Combining DTS and Temperature Modeling to Evaluate Stream Restoration on the Middle Fork of the John Day River

Change in Hydraulic Conductivity of Expansive Soils

Preventing the Accumulation of Fine Sediments in Sand Dam Reservoirs: An Analytical Framework and Flume Experiments

Africa-Appropriate Urban Stormwater Management: The State of the Art

Using Recession Analysis to Characterize Watershed Responses to Drought

Hyperspectral Disease Detection - Strategies Addressing Time, Space, Machine Learning, and Plant Susceptibility

Surface Water and Groundwater Interactions in the Walla Walla River, Northeast Oregon, USA : A Multi-Method Field-Based Approach

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