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 32 for “"Water collection"”.
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Pressure Swing Assisted Desorption for Atmospheric Water Collection
Ensuring water equity is an urgent and challenging issue in the light of climate change, global conflict, and socioeconomic disparities. Atmospheric water harvesting provides a promising option to collect water from the air, even in considerably dry conditions (RH < 40%), expanding the reach of …
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Atmospheric Water Harvesting: An Experimental Study of Viability and the Influence of Surface Geometry, Orientation, and Drainage
<p>Fresh water collection techniques have gained significant attention due to global dwindling of fresh water resources and recent scares such as the 2011-2017 California drought. This project explores the economic viability of actively harvesting water from fog, and techniques to maximize water …
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Multi-Scale Design, Thermal Simulation, Fabrication, Surface Engineering and Characterization of TPMS Structures for Atmospheric Water Generation
… is to improve the performance of Atmospheric Water Generators (AWG) by engineering the condensation surface across multiple scales. Specifically, this study explores the use of Triply Periodic Minimal Surfaces (TPMS) as condensation surfaces in Peltier-driven AWG systems—an approach that …
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a house on Tee street
… serve many purposes, including structure, rain water collection, and inhabitable space. The house has two volumes overlapped into a large cubic volume to create different spaces which can be reached through overlapping stairs leading to the different levels of the house.
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The influence of contact line dynamics on drop deposition, repellency, and condensation.
… applications, including inkjet printing, water harvesting, and spray coating technologies. In a solid-liquid interface, when a droplet is placed on a solid substrate, the boundary between the solid, the liquid, and the corresponding equilibrium vapor is referred to as the "contact line," …
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“Collecting spring water reminds us how to be human”: in search of an ethic of care for the springs of southern Cape Town
… clear that Cape Town might actually run out of water, thousands of its citizens flocked to the historical springs that flow from Table Mountain's groundwater, which for many of whom it was their first time collecting spring water. However, at the height of the water crisis, the municipality …
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Advanced methods for droplet capture in water recovery systems and agricultural sprays
Water scarcity is one of the important challenges of our century. In this thesis, we investigate advanced methods to mitigate it in two ways: water recovery from fog and reducing chemicals runoff in agriculture. In the first part, we review current fog collector design and identify droplet …
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Household ceramic water filter evaluation using three simple low-cost methods : membrane filtration, 3M Petrifilm and hydrogen sulfide bacteria in northern region, Ghana
Drinking water continues to be a major source of waterborne diseases and death in the world because many points of water collection remain unsafe. This thesis reports high level of fecal contamination found in rivers and ponds that are major sources of drinking water supply for the local …
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Development of a Method to Compare Storm Water Best Management Practices at The University of Toledo
Storm water runoff has become a concern in urban environments. Urban environments have a very large percentage of impermeable area, creating large amounts of surface runoff. This surface runoff carries contaminants (nutrients, sediments, pathogens, oils and greases) into storm water collection …
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High density polyethylene (HDPE) containers as an alternative to polyethylene terephthalate (PET) bottles for solar disinfection of drinking water in northern region, Ghana
… bottles for the solar disinfection of drinking water in the Northern Region of Ghana, in a process know as SOLAIR. This study is in line with the intention of Pure Home Water, a registered non-profit organization in Ghana, to offer a variety of low-cost household water treatment and safe storage …
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Water infrastructure : hybridized architecture along the Arizona canal
… in the 1970s. As a result, 5% of the amount of water diverted from the Colorado River is lost to evaporation and seepage from the exposed aqueduct and Lake Pleasant reservoir. This amount of loss is equivalent to the amount of water required to supply 75,000 households annually. With increasing …
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Ibuyambo: reconnecting rural Xhosa people with the natural environment in the contemporary time
… as religious and traditional rituals, fuel wood collection, water collection, and farming. However, this incredible connection is under threat due to urbanization, environmental conservation strategies, Betterment planning and the introduction of new developments. Betterment planning appears to …
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Designing for experiential access to spring water: focusing on inclusivity, ecology & education
In 2018 water scarcity caused people from all races, cultures and ages to visit allocated springs in Cape Town to collect spring water for everyday use. These water points were insufficient, over-utilized and inappropriately designed causing long queues and disputes about water. The purpose of this …
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Investigating the cause(s) of benthic macroinvertebrate community impairment downstream of two Saskatchewan uranium operations
… addition to significant differences in surface-water, pore-water and whole-sediment chemistry at the immediate down-stream exposure sites at both uranium operations. However, no significant adverse effects were noted in 10-d whole-sediment bioassays with Hyalella azteca, although this lack of …
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Fate and Transport of E. coli Through Appalachian Karst Systems
Karst waters serve as important water sources in rural Appalachia and are well-connected to surface waters, making them susceptible to anthropogenic contamination, including by fecal indicator bacteria which represent a public health risk. This work designed and implemented a watershed-scale …
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Sustainable and energy-efficient development interventions and their application toward net-zero or net-positive energy and water building development
… same buildings use 25% of the world's fresh water resources and contribute 50% of global waste. In order to make the buildings we inhabit more resource-efficient, strategies are being employed through the use of technology, materials, and design in order to achieve a new standard of …
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Drinking Water Quality Monitoring
… detection of microbial contamination in drinking water using intrinsic fluorescence of the microorganisms. The prototype, “Blinky”, uses LEDs that emit light at 365nm, 590nm, and 635nm for ultraviolet, amber, and red light, respectively. At 365 nm, the cellular components excited include reduced …
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Inbetween : a modular, climate-responsive community hub for social cohesion and environmental resilience in Hotazel, South Africa
… passive rock-store cooling, thermal massing, and water collection systems further addresses the harsh local climate while ensuring energy efficiency. The modularity also facilitates community involvement in the construction process, promoting a sense of ownership and long-term adaptability. By …
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Everyday citizenship: people, place and politics in Philippi
… as well as other more basic infrastructure like water, sanitation, and electricity, which are often void in spaces in Philippi. Amin (2014) highlights the politics of community and institution, and visible and invisible infrastructure (Amin, 2014). Networks of social gathering spaces, such as …
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Understanding the Limits of Coupled Condensation and Desorption in Sorption-Based Atmospheric Water Harvesting (SAWH) Devices
Access to clean water is a serious challenge around the world, with almost 2/3 of the global population experiencing water scarcity at some point during the year, especially in dry regions. One solution to this problem is sorbent-based atmospheric water harvesting (SAWH) due to its ability to …
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