Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 34 for “"water repellency"”.
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Efficient fabrication of micropillars for water repellency using photolightography
Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2026-12-01
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Water repellency effects on liquid- and vapor-phase water exchange in soil and clay minerals
Drought conditions and wildfires can induce soil water repellency. Precipitation shifts are expected to exacerbate drought and wildfire in regions such as the southeastern United States, making it critical to understand how repellency affects water exchange processes in soil. The objectives of this …
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Field and Laboratory Studies on the Development and Control of Soil Water Repellency of Sand Root Zone Mixes
Localized dry spots (LDS) associated with water repellent (i.e., hydrophobic) soils have detrimental effects on the survival, playability, and aesthetic value of creeping bentgrass (Agrostis palustris) used for golf course putting greens. The development of water-repellent soils, using molarity of …
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Evaluating Five Years of Soil Hydrologic Response Following the 2009 Lockheed Fire in the Coastal Santa Cruz Mountains of California
… km<sup>2</sup> (7,660 acres) of the Scotts Creek watershed in August 2009. 4.5 km<sup>2</sup> (1,100 acres) of California Polytechnic State University’s educational and research facility at Swanton Pacific Ranch. The burned region presented an opportunity for studying the hydrologic response of …
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Tailoring hydrodynamics of non-wetting droplets with nano-engineered surfaces
… studies have focused on how textures induce more water repellency, and how these textures can be manufactured with different methods and materials. However, few studies have shown how these surfaces benefit the real energy processes in which the interaction between liquid droplets and solid …
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Investigation of impregnants for low-cost buildings
… building materials are more or less permeable. Water is the most significant factor in building deterioration by capillary water penetration. Impregnation of masonry with water repellents particularly with silicone impregnants is the most successful method of protection of masonry from capillary …
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The influence of fungi upon soil structure and soil water relations
… of soil structural stability and soil water processes was assessed through the application of laboratory investigations and a field based analysis. The impact of an arbuscular mycorrhizal (AM) fungal exudate glomalin (a glycoprotein), proposed to be hydrophobic was assessed for a …
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Chemical and Physical Characterization of Pre- and Post-Fire Soils for Wildfires in the Western US and Laboratory Burns
… and can cause the formation of post-fire Soil Water Repellency (SWR), which reduces water infiltration into the soil. This may induce cascading disasters including flooding, land and debris slides, and deterioration of water quality. Despite numerous studies, chemical nature of SWR is still …
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Coating Performance on Preservative Treated Wood
… conditions. The parameters measured were water permeability, colour change, general appearance, checking of wood, and the coating‟s ability to reduce preservative leaching. Coatings were characterized in terms of glass transition temperature (Tg), solid content, viscosity, density, contact …
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The impact of bacteria on the biophysics of water retention and flow in soil
… in particular the void spaces through which water, gases and solutes flow and in which organisms exist, is vital to a sustainable future on earth. The investigation of the structural behaviour of soil under different influences is fundamental to understanding and protecting the soil. This …
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Liquid-infused slippery surfaces for air-conditioning and refrigeration applications
… drawn a lot of attention due to their excellent water repellency. A method is presented for creating a durable liquid-infused surface (LISs) on aluminum surfaces to minimize the water retention and enhance thermal-hydraulic performance for air-conditioning and refrigeration (AC&R) applications. …
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Using Anisotropic Micro-Scale Topography to Manipulate the Wettability of Aluminum and Reduce the Retention of Water
Water droplets placed on a micro-grooved aluminum surface using a micro-syringe exhibit significantly increased apparent contact angles, and for water condensed onto an inclined, micro-grooved surface, the droplet volume at incipient sliding is reduced by more than 50% compared to droplets on a …
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Remediation of Soil Hydrophobicity on a Coastal USGA Sand-Based Golf Green
… superintendents and managers, especially as water restrictions intensify. The purpose of this study was to evaluate the effectiveness of thirteen soil surfactants in eliminating LDS and in maximizing root zone soil moisture on a sand based USGA golf green located on the California Central …
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Post-fire Response of Little Creek Watershed: Evaluation of Change in Sediment Production and Suspended Sediment Transport
<p>The Little Creek watershed was assessed to identify changes in event-based suspended sediment export and determine the factors contributing to sediment production the first year following the Lockheed Fire in 2009. The amount and volume of near-stream sediment sources were found to decrease, …
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Engineering physico-chemical interactions across drug delivery, agriculture and carbon capture
… resists fluid flow. In agriculture, the inherent water repellency of plant surfaces causes pesticide sprays to bounce off, resulting in enormous waste and environmental pollution. In post-combustion carbon capture, absorbing gaseous CO₂ into liquids remains prohibitively expensive as reaction …
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Post-Fire Sedimentation and the Risk to Sierra Nevada Water Supply
… Sierra Nevada region is crucial for the state’s water supply. Unfortunately, forested areas in important Sierra Nevada watersheds are being increasingly threatened by the growing risk of large, severe wildfires and in turn so are the water supplies that they support. This paper addresses how …
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Investigating Droplet Impact Dynamics on Engineered Surfaces: Effects of Roughness, Wettability, and Prospects for Anti-Icing Applications
Understanding how water droplets interact with engineered surfaces can help address critical challenges such as ice accumulation on airplanes, wind turbines, and power lines, which can pose safety risks and result in costly damage. This research examines how surface properties, including roughness …
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Assessment of Site and Soil Characteristics of Rill Erosion Following the Lockheed Fire in the Little Creek Watershed, Swanton Pacific Ranch
… fire burned a large portion of the Scotts Creek watershed, including over 90 % of the Little Creek watershed, much of which is on Cal Poly’s Swanton Pacific Ranch (SPR). After intense winter rains in 2010 there was a significant amount of hillslope-derived sediment deposited on the roads and in …
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Carbon dynamics under natural and manipulated meteorological boundary conditions in a forest and a fen ecosystem
… in well-drained soils or a lowering of the water table in water-logged soils. Due to rising temperatures precipitation is more likely to occur as rain rather than snow, resulting in reduced snowpacks in winter. In some regions, this can lead to an increasing frequency of soil frost. In …
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Hydraulic Properties Of Aggregated Oil Sand Material From The Athabasca Deposit
… contain coarse-textured soils, which have poor water retention. Furthermore, many soils naturally contain oil sand, and little is known of its effects on the surrounding soils. The key objectives of this thesis were to assess the soil water repellency (WR) and infiltration rates of aggregated …
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