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

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

Peppermint irrigation and nitrogen management for the reduction of nitrate loading to groundwater

Creator:: Smesrud, Jason K.
Abstract:: The agricultural production of peppermint has been shown to contribute significant quantities of nitrate-nitrogen to groundwater recharge. In an effort to provide new tools for increasing nitrogen efficiency within peppermint production, three research questions were proposed: i) How should plant tissue samples be collected to achieve the greatest precision when...
Resource Type:: Masters Thesis
Full Text:: : John S. Selker The agricultural production of peppermint has been shown to contribute significant

Water content and electrical conductivity profile measurements for dispersive media using enhanced time domain and frequency domain models

Creator:: Flugstad, Benjamin A.
Abstract:: Water conservation and water quality are rapidly increasing in importance in all areas of the world. The ability to accurately measure soil water content and salinity, over a wide variety of conditions, is key to meeting this need. A set of forward prediction models and waveform interpretation algorithms to extract...
Resource Type:: Dissertation
Full Text:: Abstract approved: _____________________________________________________________________ John S. Selker

Investigating One-way Stream-aquifer Connectivity on Streamflow Predictions during Hydrologic Extremes in the National Water Model

Creator:: Jachens, Elizabeth R.
Abstract:: Surface water and groundwater are intimately connected by a two-way flux between the stream and the underlying aquifers; a complicated yet crucial relationship to represent in models. However, the National Water Model currently only considers a one-way flux, where groundwater can enter a stream but cannot return to the aquifer....
Resource Type:: Masters Thesis
Full Text:: : ______________________________________________________ John S. Selker Surface water and groundwater are intimately connected by a two-way flux

Towards autonomous irrigation : comparison of two moisture sensing technologies, irrigation distribution analysis, and wireless network performance at an ornamental container nursery

Creator:: Bailey, Daniel R.
Abstract:: As ornamental container nurseries face diminishing water allocations, many are looking to automated irrigation solutions to increase their water application efficiency. This thesis presents the findings of a study conducted at a commercial container nursery to determine 1) whether a capacitance or load cell sensor was better suited for monitoring...
Resource Type:: Masters Thesis
Full Text:: : John S. Selker As ornamental container nurseries face diminishing water allocations, many are

ScholarsArchive@OSU

Evaluation of stream temperature spatial variation using distributed temperature sensing

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

Peppermint irrigation and nitrogen management for the reduction of nitrate loading to groundwater

Water content and electrical conductivity profile measurements for dispersive media using enhanced time domain and frequency domain models

Investigating One-way Stream-aquifer Connectivity on Streamflow Predictions during Hydrologic Extremes in the National Water Model

Towards autonomous irrigation : comparison of two moisture sensing technologies, irrigation distribution analysis, and wireless network performance at an ornamental container nursery

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