Index Catalog // ScholarsArchive@OSU

Headwater stream characterization : an energy and physical approach to stream temperature using distributed temperature sensing

Creator:: Roth, Travis R.
Abstract:: Headwater streams are an integral part of the ecological health of the greater stream network as they provide valuable biological habitat, provide upwards to 95% of total in channel flow, while providing downstream reaches with important constituents such as sediment and woody debris. Small headwater streams are particularly susceptible to...
Resource Type:: Masters Thesis
Full Text:: transfer processes. Stream temperatures tend to increase in the downstream direction as surface water is

Interactions between microbial dynamics and transport processes in soils

Creator:: Rockhold, Mark L.
Abstract:: An experimental and numerical modeling investigation was conducted to study interactions between microbial dynamics and transport processes in variably saturated porous media. These interactions are important in a variety of applied problems such as water and wastewater treatment, bioremediation, and oil-field recovery operations. These processes and interactions also have great...
Resource Type:: Dissertation
Full Text:: between Microbial Dynamics and Transport Processes in Soils. Abstract approved An experimental and

Characterization of hydrologic parameters and processes in shrink-swell clay soils

Creator:: Stewart, Ryan D.
Abstract:: Vertisols and other vertic-intergrade soils are found all over the globe, including many agricultural and urban areas. These soils are characterized by their cyclical shrinking and swelling behaviors, where bulk density and porosity distribution both vary as functions of time and/or soil moisture. In turn, alterations in physical soil parameters...
Resource Type:: Dissertation
Full Text:: : Characterization of Hydrologic Parameters and Processes in Shrink-swell Clay Soils Abstract approved

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 OF THE DISSERTATION OF Benjamin A. Flugstad for the degree of Doctor of Philosophy in

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:: processes in the Walla Walla River, Northeast Oregon, USA, with focus on advancing methodologies

Improving soil water determination in spatially variable field using fiber optic technology and Bayesian decision theory

Creator:: Sayde, Chadi
Abstract:: Achieving and maintaining sustainability in irrigated agriculture production in the era of rapidly increasing stress on our natural resources require, among other essential actions, optimum control and management of the applied water. Thus, a significant upgrade of the currently available soil water monitoring technologies is needed. The primary goal of...
Resource Type:: Dissertation
Full Text:: ................................................................................................... 76 4.2.1 Challenges in monitoring dynamic scales hydraulic processes ............. 77 4.2.2 Soil

Understanding Aquifer Water Retention Dynamics Using Groundwater Head Relaxation Time

Creator:: Jimmie, Jordan A.
Abstract:: Diking and channelizing in the Toppenish Creek basin, associated with irrigated agricultural development, has altered its natural ecosystem function and hydraulic processes. We seek to answer two research questions: if surface waters are diverted for aquifer recharge in the winter, will this water be available for ecosystem function in the...
Resource Type:: Masters Thesis
Full Text:: relationship between streamflow and storage in a nonlinear equation as 𝑄𝑄 = 𝑎𝑎𝑆𝑆𝑛𝑛 [L3/T] (1

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:: DISSERTATION OF Elizabeth R. Jachens for the degree of Doctor of Philosophy in Water Resources Engineering

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:: the degree of Master of Science in Water Resources Engineering and Biological and Ecological

Determining contact angle of solutions with varying surface tension on dry and pre-wetted silica sands

Creator:: McGinnis, Thomas L.
Abstract:: Infiltration of highly concentrated solutions into unsaturated sand is suspected to be affected by the liquid-gas interfacial tension between the resident water and that of the infiltrating solution. The wetting of non-porous solid surfaces by liquids is commonly quantified by contact angle measurements. However, it is well known that wettability...
Resource Type:: Masters Thesis
Full Text:: can be important in subsurface transport processes. The wetting of porous solids however, presents

ScholarsArchive@OSU

Headwater stream characterization : an energy and physical approach to stream temperature using distributed temperature sensing

Interactions between microbial dynamics and transport processes in soils

Characterization of hydrologic parameters and processes in shrink-swell clay soils

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

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

Improving soil water determination in spatially variable field using fiber optic technology and Bayesian decision theory

Understanding Aquifer Water Retention Dynamics Using Groundwater Head Relaxation Time

Using Recession Analysis to Characterize Watershed Responses to Drought

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

Determining contact angle of solutions with varying surface tension on dry and pre-wetted silica sands

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