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:: cold patch exceeded 2.31◦C cooler than ambient stream temperature. Tributary inflows provided some of

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:: ”. Uncertainty propagation analysis associated with DTS measurement was calculated to be 0.21 °C. Salt tracer

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:: ............................................................................................................. 67 C Rain Bird Sales Uniformity Evaluation

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:: collected and analyzed the electrical resistivity data. Hamil C. Uribe provided historical, meteorological

Observations of gas flow in porous media using the light transmission technique

Creator:: Parker, Laila Belkov
Abstract:: A novel technique was developed for studying gas phase flow in unsaturated porous media. Carbon dioxide was pumped through a back-lit chamber packed with translucent sand which was variably saturated with water containing the pH indicator dye methyl red. As the carbon dioxide dissolved in the pore water, lowering the...
Resource Type:: Masters Thesis
Full Text:: transmission C /101 [ 1n( I{ j ]Yo. 74 -235.50° 42 2.3 Here C is dye concentration, I/Io is the

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:: of a 4◦C warming scenario, presenting a unique opportunity to test the fundamental hypotheses about

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:: . .......................................................................................................84 3.2: Map of the Walla Walla River study reach showing locations of piezometer sets A, B, and C

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:: content of three sample columns (A, B, and C) of 40/50 grade Accusand

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:: : ............................................................................................................. 388 Appendix C: Supplement to Literature Review of Existing Dielectric Mixing and Propagation

ScholarsArchive@OSU

Evaluation of stream temperature spatial variation using distributed temperature sensing

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

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

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

Observations of gas flow in porous media using the light transmission technique

Using Recession Analysis to Characterize Watershed Responses to Drought

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

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

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

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